Adjoint Solver Workshop

Size: px
Start display at page:

Download "Adjoint Solver Workshop"

Transcription

1 Adjoint Solver Workshop

2 Why is an Adjoint Solver useful? Design and manufacture for better performance: e.g. airfoil, combustor, rotor blade, ducts, body shape, etc. by optimising a certain characteristic CFD has the capability to explore the design space Sensitivity analysis may be used to provide insight into how best to optimise the design

3 How can we explore a design space? STAR-CCM+ already used for sensitivity and optimisation using DOE approaches with surface response and optimum search Coupled with ISIGHT, modefrontier, Heeds, Optimus, and Optimate Pros: Straightforward generation of information by solving multiple design points to find optimal set of parameters for given objectives Cons: Prohibitively expensive when the number of parameters goes up i.e. for CCD: 1p-> 5 dp / 2p-> 9 dp / 5p-> 27 dp / 20 -> 553 dp STAR-CCM+ adjoint method provides a more efficient approach to sensitivity analysis where cost is independent of the number of design parameters Gradient method based on differentiating the primal equation Can be used in shape optimisation, flow field insight, uncertainty quantification, and inverse problems

4 What is the Adjoint Method? Helps understand influence of parameter variations on the solution Examples If I change the shape of my duct, what happens to the pressure drop? If I change my inlet conditions, will flow uniformity improve at the outlet? If I change my airfoil shape will it produce more lift? How sensitive is my flow to changes due to manufacturing tolerances The pressure loss of my system is too high, what are the main drivers of this?

5 Traditional Analysis Workflow How do I know the effect on solution if Geometry changes? Mesh changes? Boundary/physics variation? Traditional answer ends up in running many cases N configurations = N Cases Effects of parameter changes only understood after multiple iterations of analysis cycle Setup geometry, physics Run flow solver Analyze results Setup geometry, physics Run flow solver Analyze results Setup geometry, physics Run flow solver Analyze results

6 Adjoint Method Workflow Adjoint provides design insight Offers guidance towards improving system s performance Gives insight into relative influence of variables on objective Adjoint is effective for problems with many design variables Far fewer design iterations needed Faster route to optimised design Setup geometry, physics Run flow solver Analyze results Set Cost Functions Run adjoint solver Analyze results Update model Run flow solver Analyze results STAR-CCM+ Adjoint Solver

7 What the Adjoint Method Provides Input User Data Initial geometry, Surface/volume mesh Physical conditions (boundaries, flow models) Choose how to modify our simulation Deform shape, change boundaries etc Run Flow Solver Provides output data for given inputs Pressures, Velocities, Forces, Drag, Pressure Drop Solve Adjoint Flow & Mesh Take flow solution and provide sensitivity of objectives to flow & geometry parameters Choose Simulation Objectives Reduce pressure drop, maximize lift, velocity uniformity etc Objectives become adjoint cost functions

8 Examples of typical uses Shape optimisation Part design Determine best design based on shape modifications Drive the parametric changes Leverage external optimisation code Coupled with gradient-based optimisation method Examples 1. Car-body shape analysis to improve external aerodynamics behavior 2. Optimise the geometry of three-way catalyst pipes optimisation for satisfying (A) Velocity uniformity in front of catalyst and (B) Velocity value at the specific point conditions Maximizing A, B, A and B Maximizing A and minimizing B Maximizing B and minimizing A

9 STAR-CCM+ Adjoint Solver Available in STAR-CCM+ v8.04 onwards Delivered as a standard feature No additional license Aggressive development schedule lots of new features

10 Compatibility with Primal Flow Solution Adjoint solver provides sensitivities based on the following models: Coupled implicit flow and fluid energy solvers Steady State Moving Reference Frame Multi-region Inviscid, laminar and frozen turbulence Single component gas and liquid Ideal gas (compressible) or constant density (incompressible) Constant material properties Use of the double precision version of STAR-CCM+ is recommended

11 Adjoint Solver Capabilities Flow and mesh adjoint solvers Fully parallel 1st or 2nd order spatial discretisation solution Defect correction solver method GMRES Krylov solver method Optional method for tough to converge cases Arbitrary number of cost functions Force (drag, lift), Moment Pressure drop Flow uniformity Sensitivities of cost functions with respect to Flow residuals Momentum equations, continuity, etc Design points Gradients with respect to user defined design points Mesh morphing based on design point relocation

12 Adjoint Cost Functions Cost functions represent the engineering objectives of the simulation An arbitrary number may be setup It is possible to view the flow and mesh adjoints for each cost function They may be created on physical boundaries or interfaces Force (e.g. Lift, Drag) & Moment Takes information from force or moment report with usual inputs Pressure drop Difference of mass flow averaged total pressure between two groups of boundary surfaces Specify high and low pressure boundaries Uniformity ratio Deviation of local normal velocity from mass flow averaged value

13 Adjoint Outputs Adjoint flow data Sensitivity of cost functions with respect to x, y and z momentum Allows us to understand how a change in the velocity field affects the cost function of interest E.G. Will increasing inlet velocities of my duct harm the uniformity at the outlet? Continuity Sensitivity of cost functions to changes in the mass of the system E.G. if I insert a boundary layer suction device will my drag change? Energy Effects of changing thermal properties on the cost function E.G. How will energy affect my pressure drop as a result of changing my fluid s density?

14 Adjoint Outputs Adjoint mesh data The adjoint mesh solver provides sensitivities with respect to mesh coordinates This allows you to better understand the affect of mesh structure on the cost function of interest E.G. Which areas of mesh have the greatest effect on my lift force and where should I pay attention to adequately capturing flow structures Boundary parameter sensitivity reports These reports return the gradient of the cost function with respect to changes in boundary inputs Gradients are only returned for inputs for the boundary type specified This allows you to better understand the influence of boundary conditions values on the cost function of interest E.G. If I change the velocity on my inlet, how will my uniformity change?

15 Example Case

16 Front Wing optimisation Goal: Increase the downforce on race car front wing Case Details: 100 kph 700k polyhedra Cost function based on force report on lower element

17 Solution Method Unconstrained steepest decent method used 524 design points created in a net around the wing Gradients calculated at design points Displacements calculated by scaling gradients by an alpha of 5e-5 Run Primal Flow Solution Run Adjoin Flow Solution Calculate Mesh Sensitivities Scale Gradients to Calculate Offset Positions Morph Mesh

18 Results Wing Profile

19 Results - Downforce 480 Front Wing Lower Element Downforce Downforce [N] % Improvement in Downforce Across 10 Design Iterations Design Iteration

20 Using the STAR-CCM+ Adjoint Solver

21 Running an Adjoint Analysis Run primal flow solution Attention must be paid to convergence Enable adjoint flow solver Selection via physics continua model selector Choose cost functions Available via right click on Adjoint cost functions Run adjoint flow solver Right click on adjoint flow model to step or run Run adjoint mesh solver Right click on adjoint mesh compute mesh sensitivity to run Visualize results Scalars and vectors grouped under Adjoint then by cost function

22 Demonstration

23 Summary Sensitivity analysis may be used to provide insight into how best to optimise a design STAR-CCM+ provides an integrated adjoint solver The solver provides both 1st and 2nd order adjoints for improved accuracy Requires no additional licenses Extensive documentation and tutorials CD-adapco is actively involved with our partners to integrate adjoint with optimisation tools Aggressive adjoint development schedule will be maintained, delivering new features

24 Thank You

Shape optimisation using breakthrough technologies

Shape optimisation using breakthrough technologies Shape optimisation using breakthrough technologies Compiled by Mike Slack Ansys Technical Services 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary Introduction Shape optimisation technologies

More information

Mesh Morphing and the Adjoint Solver in ANSYS R14.0. Simon Pereira Laz Foley

Mesh Morphing and the Adjoint Solver in ANSYS R14.0. Simon Pereira Laz Foley Mesh Morphing and the Adjoint Solver in ANSYS R14.0 Simon Pereira Laz Foley 1 Agenda Fluent Morphing-Optimization Feature RBF Morph with ANSYS DesignXplorer Adjoint Solver What does an adjoint solver do,

More information

Verification and Validation of Turbulent Flow around a Clark-Y Airfoil

Verification and Validation of Turbulent Flow around a Clark-Y Airfoil Verification and Validation of Turbulent Flow around a Clark-Y Airfoil 1. Purpose 58:160 Intermediate Mechanics of Fluids CFD LAB 2 By Tao Xing and Fred Stern IIHR-Hydroscience & Engineering The University

More information

Adjoint Solver Advances, Tailored to Automotive Applications

Adjoint Solver Advances, Tailored to Automotive Applications Adjoint Solver Advances, Tailored to Automotive Applications Stamatina Petropoulou s.petropoulou@iconcfd.com 1 Contents 1. Icon s Principal Work in FlowHead 2. Demonstration Cases 3. Icon s Further Development

More information

Introduction to ANSYS CFX

Introduction to ANSYS CFX Workshop 03 Fluid flow around the NACA0012 Airfoil 16.0 Release Introduction to ANSYS CFX 2015 ANSYS, Inc. March 13, 2015 1 Release 16.0 Workshop Description: The flow simulated is an external aerodynamics

More information

RBF Morph An Add-on Module for Mesh Morphing in ANSYS Fluent

RBF Morph An Add-on Module for Mesh Morphing in ANSYS Fluent RBF Morph An Add-on Module for Mesh Morphing in ANSYS Fluent Gilles Eggenspieler Senior Product Manager 1 Morphing & Smoothing A mesh morpher is a tool capable of performing mesh modifications in order

More information

Introduction to Computational Fluid Dynamics Mech 122 D. Fabris, K. Lynch, D. Rich

Introduction to Computational Fluid Dynamics Mech 122 D. Fabris, K. Lynch, D. Rich Introduction to Computational Fluid Dynamics Mech 122 D. Fabris, K. Lynch, D. Rich 1 Computational Fluid dynamics Computational fluid dynamics (CFD) is the analysis of systems involving fluid flow, heat

More information

Introduction to CFX. Workshop 2. Transonic Flow Over a NACA 0012 Airfoil. WS2-1. ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.

Introduction to CFX. Workshop 2. Transonic Flow Over a NACA 0012 Airfoil. WS2-1. ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved. Workshop 2 Transonic Flow Over a NACA 0012 Airfoil. Introduction to CFX WS2-1 Goals The purpose of this tutorial is to introduce the user to modelling flow in high speed external aerodynamic applications.

More information

Introduction to C omputational F luid Dynamics. D. Murrin

Introduction to C omputational F luid Dynamics. D. Murrin Introduction to C omputational F luid Dynamics D. Murrin Computational fluid dynamics (CFD) is the science of predicting fluid flow, heat transfer, mass transfer, chemical reactions, and related phenomena

More information

CFD Optimisation case studies with STAR-CD and STAR-CCM+

CFD Optimisation case studies with STAR-CD and STAR-CCM+ CFD Optimisation case studies with STAR-CD and STAR-CCM+ Summary David J. Eby, Preetham Rao, Advanced Methods Group, Plymouth, MI USA Presented by Fred Mendonça, CD-adapco London, UK Outline Introduction

More information

Aerodynamic optimization using Adjoint methods and parametric CAD models

Aerodynamic optimization using Adjoint methods and parametric CAD models Aerodynamic optimization using Adjoint methods and parametric CAD models ECCOMAS Congress 2016 P. Hewitt S. Marques T. Robinson D. Agarwal @qub.ac.uk School of Mechanical and Aerospace Engineering Queen

More information

State of the art at DLR in solving aerodynamic shape optimization problems using the discrete viscous adjoint method

State of the art at DLR in solving aerodynamic shape optimization problems using the discrete viscous adjoint method DLR - German Aerospace Center State of the art at DLR in solving aerodynamic shape optimization problems using the discrete viscous adjoint method J. Brezillon, C. Ilic, M. Abu-Zurayk, F. Ma, M. Widhalm

More information

Tutorial 17. Using the Mixture and Eulerian Multiphase Models

Tutorial 17. Using the Mixture and Eulerian Multiphase Models Tutorial 17. Using the Mixture and Eulerian Multiphase Models Introduction: This tutorial examines the flow of water and air in a tee junction. First you will solve the problem using the less computationally-intensive

More information

THE EFFECTS OF THE PLANFORM SHAPE ON DRAG POLAR CURVES OF WINGS: FLUID-STRUCTURE INTERACTION ANALYSES RESULTS

THE EFFECTS OF THE PLANFORM SHAPE ON DRAG POLAR CURVES OF WINGS: FLUID-STRUCTURE INTERACTION ANALYSES RESULTS March 18-20, 2013 THE EFFECTS OF THE PLANFORM SHAPE ON DRAG POLAR CURVES OF WINGS: FLUID-STRUCTURE INTERACTION ANALYSES RESULTS Authors: M.R. Chiarelli, M. Ciabattari, M. Cagnoni, G. Lombardi Speaker:

More information

CFD Topological Optimization of a Car Water-Pump Inlet using TOSCA Fluid and STAR- CCM+

CFD Topological Optimization of a Car Water-Pump Inlet using TOSCA Fluid and STAR- CCM+ CFD Topological Optimization of a Car Water-Pump Inlet using TOSCA Fluid and STAR- CCM+ Dr. Anselm Hopf Dr. Andrew Hitchings Les Routledge Ford Motor Company CONTENTS Introduction/Motivation Optimization

More information

Coupled Analysis of FSI

Coupled Analysis of FSI Coupled Analysis of FSI Qin Yin Fan Oct. 11, 2008 Important Key Words Fluid Structure Interface = FSI Computational Fluid Dynamics = CFD Pressure Displacement Analysis = PDA Thermal Stress Analysis = TSA

More information

Solution Recording and Playback: Vortex Shedding

Solution Recording and Playback: Vortex Shedding STAR-CCM+ User Guide 6663 Solution Recording and Playback: Vortex Shedding This tutorial demonstrates how to use the solution recording and playback module for capturing the results of transient phenomena.

More information

High-Lift Aerodynamics: STAR-CCM+ Applied to AIAA HiLiftWS1 D. Snyder

High-Lift Aerodynamics: STAR-CCM+ Applied to AIAA HiLiftWS1 D. Snyder High-Lift Aerodynamics: STAR-CCM+ Applied to AIAA HiLiftWS1 D. Snyder Aerospace Application Areas Aerodynamics Subsonic through Hypersonic Aeroacoustics Store release & weapons bay analysis High lift devices

More information

Isotropic Porous Media Tutorial

Isotropic Porous Media Tutorial STAR-CCM+ User Guide 3927 Isotropic Porous Media Tutorial This tutorial models flow through the catalyst geometry described in the introductory section. In the porous region, the theoretical pressure drop

More information

Computational Study of Laminar Flowfield around a Square Cylinder using Ansys Fluent

Computational Study of Laminar Flowfield around a Square Cylinder using Ansys Fluent MEGR 7090-003, Computational Fluid Dynamics :1 7 Spring 2015 Computational Study of Laminar Flowfield around a Square Cylinder using Ansys Fluent Rahul R Upadhyay Master of Science, Dept of Mechanical

More information

Streamlining Aircraft Icing Simulations. D. Snyder, M. Elmore

Streamlining Aircraft Icing Simulations. D. Snyder, M. Elmore Streamlining Aircraft Icing Simulations D. Snyder, M. Elmore Industry Analysis Needs / Trends Fidelity Aircraft Ice Protection Systems-Level Modeling Optimization Background Ice accretion can critically

More information

Debojyoti Ghosh. Adviser: Dr. James Baeder Alfred Gessow Rotorcraft Center Department of Aerospace Engineering

Debojyoti Ghosh. Adviser: Dr. James Baeder Alfred Gessow Rotorcraft Center Department of Aerospace Engineering Debojyoti Ghosh Adviser: Dr. James Baeder Alfred Gessow Rotorcraft Center Department of Aerospace Engineering To study the Dynamic Stalling of rotor blade cross-sections Unsteady Aerodynamics: Time varying

More information

Accurate and Efficient Turbomachinery Simulation. Chad Custer, PhD Turbomachinery Technical Specialist

Accurate and Efficient Turbomachinery Simulation. Chad Custer, PhD Turbomachinery Technical Specialist Accurate and Efficient Turbomachinery Simulation Chad Custer, PhD Turbomachinery Technical Specialist Outline Turbomachinery simulation advantages Axial fan optimization Description of design objectives

More information

Steady Flow: Lid-Driven Cavity Flow

Steady Flow: Lid-Driven Cavity Flow STAR-CCM+ User Guide Steady Flow: Lid-Driven Cavity Flow 2 Steady Flow: Lid-Driven Cavity Flow This tutorial demonstrates the performance of STAR-CCM+ in solving a traditional square lid-driven cavity

More information

Recent & Upcoming Features in STAR-CCM+ for Aerospace Applications Deryl Snyder, Ph.D.

Recent & Upcoming Features in STAR-CCM+ for Aerospace Applications Deryl Snyder, Ph.D. Recent & Upcoming Features in STAR-CCM+ for Aerospace Applications Deryl Snyder, Ph.D. Outline Introduction Aerospace Applications Summary New Capabilities for Aerospace Continuity Convergence Accelerator

More information

Modeling Flow Through Porous Media

Modeling Flow Through Porous Media Tutorial 7. Modeling Flow Through Porous Media Introduction Many industrial applications involve the modeling of flow through porous media, such as filters, catalyst beds, and packing. This tutorial illustrates

More information

STAR-CCM+: Wind loading on buildings SPRING 2018

STAR-CCM+: Wind loading on buildings SPRING 2018 STAR-CCM+: Wind loading on buildings SPRING 2018 1. Notes on the software 2. Assigned exercise (submission via Blackboard; deadline: Thursday Week 3, 11 pm) 1. NOTES ON THE SOFTWARE STAR-CCM+ generates

More information

Commercial Implementations of Optimization Software and its Application to Fluid Dynamics Problems

Commercial Implementations of Optimization Software and its Application to Fluid Dynamics Problems Commercial Implementations of Optimization Software and its Application to Fluid Dynamics Problems Szymon Buhajczuk, M.A.Sc SimuTech Group Toronto Fields Institute Optimization Seminar December 6, 2011

More information

Speed and Accuracy of CFD: Achieving Both Successfully ANSYS UK S.A.Silvester

Speed and Accuracy of CFD: Achieving Both Successfully ANSYS UK S.A.Silvester Speed and Accuracy of CFD: Achieving Both Successfully ANSYS UK S.A.Silvester 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary Content ANSYS CFD Introduction ANSYS, the company Simulation

More information

I. Introduction. Optimization Algorithm Components. Abstract for the 5 th OpenFOAM User Conference 2017, Wiesbaden - Germany

I. Introduction. Optimization Algorithm Components. Abstract for the 5 th OpenFOAM User Conference 2017, Wiesbaden - Germany An Aerodynamic Optimization Framework for the Automotive Industry, based on Continuous Adjoint and OpenFOAM E. Papoutsis-Kiachagias 1, V. Asouti 1, K. Giannakoglou 1, K. Gkagkas 2 1) National Technical

More information

Fluent User Services Center

Fluent User Services Center Solver Settings 5-1 Using the Solver Setting Solver Parameters Convergence Definition Monitoring Stability Accelerating Convergence Accuracy Grid Independence Adaption Appendix: Background Finite Volume

More information

Multi-objective adjoint optimization of flow in duct and pipe networks

Multi-objective adjoint optimization of flow in duct and pipe networks Multi-objective adjoint optimization of flow in duct and pipe networks Eugene de Villiers Thomas Schumacher 6th OPENFOAM Workshop PennState University, USA 13-16 June, 2011 info@engys.eu Tel: +44 (0)20

More information

Validation of an Unstructured Overset Mesh Method for CFD Analysis of Store Separation D. Snyder presented by R. Fitzsimmons

Validation of an Unstructured Overset Mesh Method for CFD Analysis of Store Separation D. Snyder presented by R. Fitzsimmons Validation of an Unstructured Overset Mesh Method for CFD Analysis of Store Separation D. Snyder presented by R. Fitzsimmons Stores Separation Introduction Flight Test Expensive, high-risk, sometimes catastrophic

More information

Calculate a solution using the pressure-based coupled solver.

Calculate a solution using the pressure-based coupled solver. Tutorial 19. Modeling Cavitation Introduction This tutorial examines the pressure-driven cavitating flow of water through a sharpedged orifice. This is a typical configuration in fuel injectors, and brings

More information

ANSYS FLUENT. Airfoil Analysis and Tutorial

ANSYS FLUENT. Airfoil Analysis and Tutorial ANSYS FLUENT Airfoil Analysis and Tutorial ENGR083: Fluid Mechanics II Terry Yu 5/11/2017 Abstract The NACA 0012 airfoil was one of the earliest airfoils created. Its mathematically simple shape and age

More information

STAR-CCM+ User Guide 6922

STAR-CCM+ User Guide 6922 STAR-CCM+ User Guide 6922 Introduction Welcome to the STAR-CCM+ introductory tutorial. In this tutorial, you explore the important concepts and workflow. Complete this tutorial before attempting any others.

More information

McNair Scholars Research Journal

McNair Scholars Research Journal McNair Scholars Research Journal Volume 2 Article 1 2015 Benchmarking of Computational Models against Experimental Data for Velocity Profile Effects on CFD Analysis of Adiabatic Film-Cooling Effectiveness

More information

Multi-Mesh CFD. Chris Roy Chip Jackson (1 st year PhD student) Aerospace and Ocean Engineering Department Virginia Tech

Multi-Mesh CFD. Chris Roy Chip Jackson (1 st year PhD student) Aerospace and Ocean Engineering Department Virginia Tech Multi-Mesh CFD Chris Roy Chip Jackson (1 st year PhD student) Aerospace and Ocean Engineering Department Virginia Tech cjroy@vt.edu May 21, 2014 CCAS Program Review, Columbus, OH 1 Motivation Automated

More information

Co-Simulation von Flownex und ANSYS CFX am Beispiel einer Verdrängermaschine

Co-Simulation von Flownex und ANSYS CFX am Beispiel einer Verdrängermaschine Co-Simulation von Flownex und ANSYS CFX am Beispiel einer Verdrängermaschine Benoit Bosc-Bierne, Dr. Andreas Spille-Kohoff, Farai Hetze CFX Berlin Software GmbH, Berlin Contents Positive displacement compressors

More information

Compressible Flow in a Nozzle

Compressible Flow in a Nozzle SPC 407 Supersonic & Hypersonic Fluid Dynamics Ansys Fluent Tutorial 1 Compressible Flow in a Nozzle Ahmed M Nagib Elmekawy, PhD, P.E. Problem Specification Consider air flowing at high-speed through a

More information

A B C D E. Settings Choose height, H, free stream velocity, U, and fluid (dynamic viscosity and density ) so that: Reynolds number

A B C D E. Settings Choose height, H, free stream velocity, U, and fluid (dynamic viscosity and density ) so that: Reynolds number Individual task Objective To derive the drag coefficient for a 2D object, defined as where D (N/m) is the aerodynamic drag force (per unit length in the third direction) acting on the object. The object

More information

Automated Design Exploration and Optimization. Clinton Smith, PhD CAE Support and Training PADT April 26, 2012

Automated Design Exploration and Optimization. Clinton Smith, PhD CAE Support and Training PADT April 26, 2012 Automated Design Exploration and Optimization Clinton Smith, PhD CAE Support and Training PADT April 26, 2012 1 Agenda The path to robust design A closer look at what DX offers Some examples 2 The Path

More information

Turbomachinery Applications with STAR-CCM+ Turbomachinery Sector Manager

Turbomachinery Applications with STAR-CCM+ Turbomachinery Sector Manager Turbomachinery Applications with STAR-CCM+ Fred Mendonça Fred Mendonça Turbomachinery Sector Manager An Integrated Solution The applications of the software seem to be infinite. The user-friendly A single

More information

Shape optimization and active flow control for improved aerodynamic properties Siniša Krajnovic

Shape optimization and active flow control for improved aerodynamic properties Siniša Krajnovic Shape optimization and active flow control for improved aerodynamic properties Siniša Krajnovic HPC resources used Computer resources at C3SE at Chalmers in Göteborg Computer cluster: Neolith NSC Linköping

More information

Shape Optimization for Aerodynamic Efficiency Using Adjoint Methods

Shape Optimization for Aerodynamic Efficiency Using Adjoint Methods White Paper Shape Optimization for Aerodynamic Efficiency Using Adjoint Methods Adjoint solvers take a Computational Fluid Dynamics (CFD) flow solution and calculate the sensitivity of performance indicators

More information

Studies of the Continuous and Discrete Adjoint Approaches to Viscous Automatic Aerodynamic Shape Optimization

Studies of the Continuous and Discrete Adjoint Approaches to Viscous Automatic Aerodynamic Shape Optimization Studies of the Continuous and Discrete Adjoint Approaches to Viscous Automatic Aerodynamic Shape Optimization Siva Nadarajah Antony Jameson Stanford University 15th AIAA Computational Fluid Dynamics Conference

More information

Analysis Comparison between CFD and FEA of an Idealized Concept V- Hull Floor Configuration in Two Dimensions

Analysis Comparison between CFD and FEA of an Idealized Concept V- Hull Floor Configuration in Two Dimensions 2010 NDIA GROUND VEHICLE SYSTEMS ENGINEERING AND TECHNOLOGY SYMPOSIUM MODELING & SIMULATION, TESTING AND VALIDATION (MSTV) MINI-SYMPOSIUM AUGUST 17-19 DEARBORN, MICHIGAN Analysis Comparison between CFD

More information

ANSYS Fluid Structure Interaction for Thermal Management and Aeroelasticity

ANSYS Fluid Structure Interaction for Thermal Management and Aeroelasticity ANSYS Fluid Structure Interaction for Thermal Management and Aeroelasticity Phil Stopford Duxford Air Museum 11th May 2011 2011 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary Fluid Structure

More information

Aero-Vibro Acoustics For Wind Noise Application. David Roche and Ashok Khondge ANSYS, Inc.

Aero-Vibro Acoustics For Wind Noise Application. David Roche and Ashok Khondge ANSYS, Inc. Aero-Vibro Acoustics For Wind Noise Application David Roche and Ashok Khondge ANSYS, Inc. Outline 1. Wind Noise 2. Problem Description 3. Simulation Methodology 4. Results 5. Summary Thursday, October

More information

Simulation of Turbulent Flow in an Asymmetric Diffuser

Simulation of Turbulent Flow in an Asymmetric Diffuser Simulation of Turbulent Flow in an Asymmetric Diffuser 1. Purpose 58:160 Intermediate Mechanics of Fluids CFD LAB 3 By Tao Xing and Fred Stern IIHR-Hydroscience & Engineering The University of Iowa C.

More information

김태희, 권형일 1, 최성임 2* T.H. Kim, H.I. Kwon, and S.I. Choi

김태희, 권형일 1, 최성임 2* T.H. Kim, H.I. Kwon, and S.I. Choi 김태희, 권형일 1, 최성임 2* A STUDY ON INVERSE DESIGN OF AIRFOIL USING e-science BASED AERODYNAMICS DESIGN OPTIMIZATION FRAMEWORK T.H. Kim, H.I. Kwon, and S.I. Choi Recently, with advanced computational performance,

More information

Flow in an Intake Manifold

Flow in an Intake Manifold Tutorial 2. Flow in an Intake Manifold Introduction The purpose of this tutorial is to model turbulent flow in a simple intake manifold geometry. An intake manifold is a system of passages which carry

More information

Express Introductory Training in ANSYS Fluent Workshop 04 Fluid Flow Around the NACA0012 Airfoil

Express Introductory Training in ANSYS Fluent Workshop 04 Fluid Flow Around the NACA0012 Airfoil Express Introductory Training in ANSYS Fluent Workshop 04 Fluid Flow Around the NACA0012 Airfoil Dimitrios Sofialidis Technical Manager, SimTec Ltd. Mechanical Engineer, PhD PRACE Autumn School 2013 -

More information

Constrained Aero-elastic Multi-Point Optimization Using the Coupled Adjoint Approach

Constrained Aero-elastic Multi-Point Optimization Using the Coupled Adjoint Approach www.dlr.de Chart 1 Aero-elastic Multi-point Optimization, M.Abu-Zurayk, MUSAF II, 20.09.2013 Constrained Aero-elastic Multi-Point Optimization Using the Coupled Adjoint Approach M. Abu-Zurayk MUSAF II

More information

Advanced Applications of STAR- CCM+ in Chemical Process Industry Ravindra Aglave Director, Chemical Process Industry

Advanced Applications of STAR- CCM+ in Chemical Process Industry Ravindra Aglave Director, Chemical Process Industry Advanced Applications of STAR- CCM+ in Chemical Process Industry Ravindra Aglave Director, Chemical Process Industry Outline Notable features released in 2013 Gas Liquid Flows with STAR-CCM+ Packed Bed

More information

SPC 307 Aerodynamics. Lecture 1. February 10, 2018

SPC 307 Aerodynamics. Lecture 1. February 10, 2018 SPC 307 Aerodynamics Lecture 1 February 10, 2018 Sep. 18, 2016 1 Course Materials drahmednagib.com 2 COURSE OUTLINE Introduction to Aerodynamics Review on the Fundamentals of Fluid Mechanics Euler and

More information

A study of Jumper FIV due to multiphase internal flow: understanding life-cycle fatigue. Alan Mueller & Oleg Voronkov

A study of Jumper FIV due to multiphase internal flow: understanding life-cycle fatigue. Alan Mueller & Oleg Voronkov A study of Jumper FIV due to multiphase internal flow: understanding life-cycle fatigue Alan Mueller & Oleg Voronkov Case description Main structural dimensions [1]: deformable jumper [2] in Mixture on

More information

Use of CFD in Design and Development of R404A Reciprocating Compressor

Use of CFD in Design and Development of R404A Reciprocating Compressor Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 2006 Use of CFD in Design and Development of R404A Reciprocating Compressor Yogesh V. Birari

More information

Optimisationfor CFD. ANSYS R14 Fluids Update Seminar. Milton Park, February 16 th, 2012 Sheffield, February 29 th, 2012 Aberdeen, March 8 th, 2012

Optimisationfor CFD. ANSYS R14 Fluids Update Seminar. Milton Park, February 16 th, 2012 Sheffield, February 29 th, 2012 Aberdeen, March 8 th, 2012 Optimisationfor CFD ANSYS R14 Fluids Update Seminar David Mann, ANSYS UK Ltd. Milton Park, February 16 th, 2012 Sheffield, February 29 th, 2012 Aberdeen, March 8 th, 2012 1 Agenda Optimisation Tools for

More information

Impact of STAR-CCM+ v7.0 in the Automotive Industry Frederick J. Ross, CD-adapco Director, Ground Transportation

Impact of STAR-CCM+ v7.0 in the Automotive Industry Frederick J. Ross, CD-adapco Director, Ground Transportation Impact of STAR-CCM+ v7.0 in the Automotive Industry Frederick J. Ross, CD-adapco Director, Ground Transportation Vehicle Simulation Components Vehicle Aerodynamics Design Studies Aeroacoustics Water/Dirt

More information

Missile External Aerodynamics Using Star-CCM+ Star European Conference 03/22-23/2011

Missile External Aerodynamics Using Star-CCM+ Star European Conference 03/22-23/2011 Missile External Aerodynamics Using Star-CCM+ Star European Conference 03/22-23/2011 StarCCM_StarEurope_2011 4/6/11 1 Overview 2 Role of CFD in Aerodynamic Analyses Classical aerodynamics / Semi-Empirical

More information

Using a Single Rotating Reference Frame

Using a Single Rotating Reference Frame Tutorial 9. Using a Single Rotating Reference Frame Introduction This tutorial considers the flow within a 2D, axisymmetric, co-rotating disk cavity system. Understanding the behavior of such flows is

More information

Modeling External Compressible Flow

Modeling External Compressible Flow Tutorial 3. Modeling External Compressible Flow Introduction The purpose of this tutorial is to compute the turbulent flow past a transonic airfoil at a nonzero angle of attack. You will use the Spalart-Allmaras

More information

NUMERICAL 3D TRANSONIC FLOW SIMULATION OVER A WING

NUMERICAL 3D TRANSONIC FLOW SIMULATION OVER A WING Review of the Air Force Academy No.3 (35)/2017 NUMERICAL 3D TRANSONIC FLOW SIMULATION OVER A WING Cvetelina VELKOVA Department of Technical Mechanics, Naval Academy Nikola Vaptsarov,Varna, Bulgaria (cvetelina.velkova1985@gmail.com)

More information

Simulating Sinkage & Trim for Planing Boat Hulls. A Fluent Dynamic Mesh 6DOF Tutorial

Simulating Sinkage & Trim for Planing Boat Hulls. A Fluent Dynamic Mesh 6DOF Tutorial Simulating Sinkage & Trim for Planing Boat Hulls A Fluent Dynamic Mesh 6DOF Tutorial 1 Introduction Workshop Description This workshop describes how to perform a transient 2DOF simulation of a planing

More information

Application of Wray-Agarwal Turbulence Model for Accurate Numerical Simulation of Flow Past a Three-Dimensional Wing-body

Application of Wray-Agarwal Turbulence Model for Accurate Numerical Simulation of Flow Past a Three-Dimensional Wing-body Washington University in St. Louis Washington University Open Scholarship Mechanical Engineering and Materials Science Independent Study Mechanical Engineering & Materials Science 4-28-2016 Application

More information

Strömningslära Fluid Dynamics. Computer laboratories using COMSOL v4.4

Strömningslära Fluid Dynamics. Computer laboratories using COMSOL v4.4 UMEÅ UNIVERSITY Department of Physics Claude Dion Olexii Iukhymenko May 15, 2015 Strömningslära Fluid Dynamics (5FY144) Computer laboratories using COMSOL v4.4!! Report requirements Computer labs must

More information

S-ducts and Nozzles: STAR-CCM+ at the Propulsion Aerodynamics Workshop. Peter Burns, CD-adapco

S-ducts and Nozzles: STAR-CCM+ at the Propulsion Aerodynamics Workshop. Peter Burns, CD-adapco S-ducts and Nozzles: STAR-CCM+ at the Propulsion Aerodynamics Workshop Peter Burns, CD-adapco Background The Propulsion Aerodynamics Workshop (PAW) has been held twice PAW01: 2012 at the 48 th AIAA JPC

More information

AERODYNAMIC OPTIMIZATION OF A FORMULA STUDENT CAR

AERODYNAMIC OPTIMIZATION OF A FORMULA STUDENT CAR AERODYNAMIC OPTIMIZATION OF A FORMULA STUDENT CAR 1 Argyrios Apostolidis *, 2 Athanasios Mattas, 3 Aggelos Gaitanis, 4 Nikolaos Christodoulou 1 Aristotle Racing Team, Greece, 4 BETA CAE Systems S.A., Greece

More information

ADJOINT OPTIMIZATION OF 2D-AIRFOILS IN INCOMPRESSIBLE FLOWS

ADJOINT OPTIMIZATION OF 2D-AIRFOILS IN INCOMPRESSIBLE FLOWS 11th World Congress on Computational Mechanics (WCCM XI) 5th European Conference on Computational Mechanics (ECCM V) 6th European Conference on Computational Fluid Dynamics (ECFD VI) E. Oñate, J. Oliver

More information

Parameter based 3D Optimization of the TU Berlin TurboLab Stator with ANSYS optislang

Parameter based 3D Optimization of the TU Berlin TurboLab Stator with ANSYS optislang presented at the 14th Weimar Optimization and Stochastic Days 2017 Source: www.dynardo.de/en/library Parameter based 3D Optimization of the TU Berlin TurboLab Stator with ANSYS optislang Benedikt Flurl

More information

Adjoint Optimization combined with mesh morphing for CFD applications

Adjoint Optimization combined with mesh morphing for CFD applications Adjoint Optimization combined with mesh morphing for CFD applications Alberto Clarich*, Luca Battaglia*, Enrico Nobile**, Marco Evangelos Biancolini, Ubaldo Cella *ESTECO Spa, Italy. Email: engineering@esteco.com

More information

Analysis of an airfoil

Analysis of an airfoil UNDERGRADUATE RESEARCH FALL 2010 Analysis of an airfoil using Computational Fluid Dynamics Tanveer Chandok 12/17/2010 Independent research thesis at the Georgia Institute of Technology under the supervision

More information

Supersonic Flow Over a Wedge

Supersonic Flow Over a Wedge SPC 407 Supersonic & Hypersonic Fluid Dynamics Ansys Fluent Tutorial 2 Supersonic Flow Over a Wedge Ahmed M Nagib Elmekawy, PhD, P.E. Problem Specification A uniform supersonic stream encounters a wedge

More information

Using STAR-CCM+ for Catalyst Utilization Analysis

Using STAR-CCM+ for Catalyst Utilization Analysis Using STAR-CCM+ for Catalyst Utilization Analysis Amsterdam Netherlands March 19-21 2012 W.U. A. Leong Dunton Technical Centre Ford Motor Company S. Eroglu and S. Guryuva Gebze Engineering Ford Otosan

More information

Optimization of under-relaxation factors. and Courant numbers for the simulation of. sloshing in the oil pan of an automobile

Optimization of under-relaxation factors. and Courant numbers for the simulation of. sloshing in the oil pan of an automobile Optimization of under-relaxation factors and Courant numbers for the simulation of sloshing in the oil pan of an automobile Swathi Satish*, Mani Prithiviraj and Sridhar Hari⁰ *National Institute of Technology,

More information

Tutorial: Hydrodynamics of Bubble Column Reactors

Tutorial: Hydrodynamics of Bubble Column Reactors Tutorial: Introduction The purpose of this tutorial is to provide guidelines and recommendations for solving a gas-liquid bubble column problem using the multiphase mixture model, including advice on solver

More information

A COUPLED FINITE VOLUME SOLVER FOR THE SOLUTION OF LAMINAR TURBULENT INCOMPRESSIBLE AND COMPRESSIBLE FLOWS

A COUPLED FINITE VOLUME SOLVER FOR THE SOLUTION OF LAMINAR TURBULENT INCOMPRESSIBLE AND COMPRESSIBLE FLOWS A COUPLED FINITE VOLUME SOLVER FOR THE SOLUTION OF LAMINAR TURBULENT INCOMPRESSIBLE AND COMPRESSIBLE FLOWS L. Mangani Maschinentechnik CC Fluidmechanik und Hydromaschinen Hochschule Luzern Technik& Architektur

More information

Simulation of Flow Development in a Pipe

Simulation of Flow Development in a Pipe Tutorial 4. Simulation of Flow Development in a Pipe Introduction The purpose of this tutorial is to illustrate the setup and solution of a 3D turbulent fluid flow in a pipe. The pipe networks are common

More information

ANSYS AIM Tutorial Turbulent Flow Over a Backward Facing Step

ANSYS AIM Tutorial Turbulent Flow Over a Backward Facing Step ANSYS AIM Tutorial Turbulent Flow Over a Backward Facing Step Author(s): Sebastian Vecchi, ANSYS Created using ANSYS AIM 18.1 Problem Specification Pre-Analysis & Start Up Governing Equation Start-Up Geometry

More information

Swapnil Nimse Project 1 Challenge #2

Swapnil Nimse Project 1 Challenge #2 Swapnil Nimse Project 1 Challenge #2 Project Overview: Using Ansys-Fluent, analyze dependency of the steady-state temperature at different parts of the system on the flow velocity at the inlet and buoyancy-driven

More information

Computational Fluid Dynamics (CFD) Simulation in Air Duct Channels Using STAR CCM+

Computational Fluid Dynamics (CFD) Simulation in Air Duct Channels Using STAR CCM+ Available onlinewww.ejaet.com European Journal of Advances in Engineering and Technology, 2017,4 (3): 216-220 Research Article ISSN: 2394-658X Computational Fluid Dynamics (CFD) Simulation in Air Duct

More information

The Continuous Adjoint Method for the Computation of First- and Higher-Order Sensitivities

The Continuous Adjoint Method for the Computation of First- and Higher-Order Sensitivities NATIONAL TECHNICAL UNIVERSITY OF ATHENS Parallel CFD & Optimization Unit Laboratory of Thermal Turbomachines The Continuous Adjoint Method for the Computation of First- and Higher-Order Sensitivities (Activities,

More information

How to Enter and Analyze a Wing

How to Enter and Analyze a Wing How to Enter and Analyze a Wing Entering the Wing The Stallion 3-D built-in geometry creation tool can be used to model wings and bodies of revolution. In this example, a simple rectangular wing is modeled

More information

Adjoint-Based Sensitivity Analysis for Computational Fluid Dynamics

Adjoint-Based Sensitivity Analysis for Computational Fluid Dynamics Adjoint-Based Sensitivity Analysis for Computational Fluid Dynamics Dimitri J. Mavriplis Max Castagne Professor Department of Mechanical Engineering University of Wyoming Laramie, WY USA Motivation Computational

More information

Flow and Heat Transfer in a Mixing Elbow

Flow and Heat Transfer in a Mixing Elbow Flow and Heat Transfer in a Mixing Elbow Objectives The main objectives of the project are to learn (i) how to set up and perform flow simulations with heat transfer and mixing, (ii) post-processing and

More information

CFD Simulation of a dry Scroll Vacuum Pump including Leakage Flows

CFD Simulation of a dry Scroll Vacuum Pump including Leakage Flows CFD Simulation of a dry Scroll Vacuum Pump including Leakage Flows Jan Hesse, Rainer Andres CFX Berlin Software GmbH, Berlin, Germany 1 Introduction Numerical simulation results of a dry scroll vacuum

More information

Comparison Between Numerical & PIV Experimental Results for Gas-Solid Flow in Ducts

Comparison Between Numerical & PIV Experimental Results for Gas-Solid Flow in Ducts Fabio Kasper Comparison Between Numerical & PIV Experimental Results for Gas-Solid Flow in Ducts Rodrigo Decker, Oscar Sgrott Jr., Henry F. Meier Waldir Martignoni Agenda Introduction The Test Bench Case

More information

Research and Design working characteristics of orthogonal turbine Nguyen Quoc Tuan (1), Chu Dinh Do (2), Quach Thi Son (2)

Research and Design working characteristics of orthogonal turbine Nguyen Quoc Tuan (1), Chu Dinh Do (2), Quach Thi Son (2) GSJ: VOLUME 6, ISSUE 6, JUNE 018 116 Research and Design working characteristics of orthogonal turbine Nguyen Quoc Tuan (1), Chu Dinh Do (), Quach Thi Son () (1) Institute for hydro power and renewable

More information

CFD MODELING FOR PNEUMATIC CONVEYING

CFD MODELING FOR PNEUMATIC CONVEYING CFD MODELING FOR PNEUMATIC CONVEYING Arvind Kumar 1, D.R. Kaushal 2, Navneet Kumar 3 1 Associate Professor YMCAUST, Faridabad 2 Associate Professor, IIT, Delhi 3 Research Scholar IIT, Delhi e-mail: arvindeem@yahoo.co.in

More information

EXPERIMENTAL VALIDATION OF STAR-CCM+ FOR LIQUID CONTAINER SLOSH DYNAMICS

EXPERIMENTAL VALIDATION OF STAR-CCM+ FOR LIQUID CONTAINER SLOSH DYNAMICS EXPERIMENTAL VALIDATION OF STAR-CCM+ FOR LIQUID CONTAINER SLOSH DYNAMICS Brandon Marsell a.i. solutions, Launch Services Program, Kennedy Space Center, FL 1 Agenda Introduction Problem Background Experiment

More information

OpenFOAM GUIDE FOR BEGINNERS

OpenFOAM GUIDE FOR BEGINNERS OpenFOAM GUIDE FOR BEGINNERS Authors This guide has been developed by: In association with: Pedro Javier Gamez and Gustavo Raush The Foam House Barcelona ETSEIAT-UPC June 2014 2 OPENFOAM GUIDE FOR BEGINNERS

More information

Grid. Apr 09, 1998 FLUENT 5.0 (2d, segregated, lam) Grid. Jul 31, 1998 FLUENT 5.0 (2d, segregated, lam)

Grid. Apr 09, 1998 FLUENT 5.0 (2d, segregated, lam) Grid. Jul 31, 1998 FLUENT 5.0 (2d, segregated, lam) Tutorial 2. Around an Airfoil Transonic Turbulent Flow Introduction: The purpose of this tutorial is to compute the turbulent flow past a transonic airfoil at a non-zero angle of attack. You will use the

More information

Gradient-based Optimization of Parameterized CAD Geometries

Gradient-based Optimization of Parameterized CAD Geometries 11 th World Congress on Structural and Multidisciplinary Optimization 7 th - 12 th, June 2015, Sydney Australia Gradient-based Optimization of Parameterized CAD Geometries Timothée Leblond 1,2, Pierre

More information

Ryian Hunter MAE 598

Ryian Hunter MAE 598 Setup: The initial geometry was produced using the engineering schematics provided in the project assignment document using the ANSYS DesignModeler application taking advantage of system symmetry. Fig.

More information

CD-adapco STAR Global Conference, Orlando, 2013, March 18-20

CD-adapco STAR Global Conference, Orlando, 2013, March 18-20 Transient Radial Blower Simulation as Part of the Development Process W. Kühnel, M. Weinmann, G. Apostolopoulos, S. Larpent Behr GmbH & Co. KG, Germany CD-adapco STAR Global Conference, Orlando, 2013,

More information

CFD Analysis of conceptual Aircraft body

CFD Analysis of conceptual Aircraft body CFD Analysis of conceptual Aircraft body Manikantissar 1, Dr.Ankur geete 2 1 M. Tech scholar in Mechanical Engineering, SD Bansal college of technology, Indore, M.P, India 2 Associate professor in Mechanical

More information

Verification and Validation of Turbulent Flow around a Clark-Y Airfoil

Verification and Validation of Turbulent Flow around a Clark-Y Airfoil 1 Verification and Validation of Turbulent Flow around a Clark-Y Airfoil 1. Purpose ME:5160 Intermediate Mechanics of Fluids CFD LAB 2 (ANSYS 19.1; Last Updated: Aug. 7, 2018) By Timur Dogan, Michael Conger,

More information

ANSYS AIM Tutorial Compressible Flow in a Nozzle

ANSYS AIM Tutorial Compressible Flow in a Nozzle ANSYS AIM Tutorial Compressible Flow in a Nozzle Author(s): Sebastian Vecchi Created using ANSYS AIM 18.1 Problem Specification Pre-Analysis & Start Up Pre-Analysis Start-Up Geometry Import Geometry Mesh

More information

Modeling Unsteady Compressible Flow

Modeling Unsteady Compressible Flow Tutorial 4. Modeling Unsteady Compressible Flow Introduction In this tutorial, FLUENT s density-based implicit solver is used to predict the timedependent flow through a two-dimensional nozzle. As an initial

More information