Validation of the Pressure Code using JHU DNS Database

Size: px
Start display at page:

Download "Validation of the Pressure Code using JHU DNS Database"

Transcription

1 Validation of the Pressure Code using JHU DNS Database JHU turbulence DNS database ( ) The data is from a direct numerical simulation of forced isotropic turbulence on a periodic grid, with energy injected at low wave number modes; The database has 1,024 instantaneous realizations. Data of the 3 components of the velocity as well as the pressure are available. Three adjacent planar areas with grids are selected from the cube for the pressure code validation. Material acceleration is calculated in the Eulerian form (i.e., with the unsteady and convective terms calculated explicitly) based on 3-D plus t velocity data, using central difference scheme. Three adjacent planes selected from the DNS cube JHU DNS Database Parameters Domain (range of x, y and z) [0,2π] Dissipation rate Total number of grid Rms velocity Grid size Taylor Micro. Scale Viscosity Taylor-scale Reynolds number 433 Simulation time-step Kolmogorov time scale Time interval between stored samples Kolmogorov length scale Duration of samples stored [0, 2.048] Integral scale Total kinetic energy Large eddy turnover time: 2.02 Thanks to Mr. Yunke Yang, Dr. Zuoli Xiao and Dr. Minping Wan for their help in retrieving the DNS data from the database.

2 Pressure Reconstruction by Integration of the DNS Pressure Gradient DNS Pressure Distribution Pressure Distribution integrated from the DNS pressure gradient Error of Reconstruction p = p Cal - p DNS Relative error mostly below 0.2% (maximum is about 3%) DNS Pressure distribution overlapped with the in-plane material acceleration Big error is associated with large acceleration, i.e., large pressure gradient Same plot with zoomed scale Conclusion: If the pressure gradient is right, the reconstructed pressure is right. * : DNS pressure gradient is obtained using central difference scheme.

3 (a) Pressure Reconstructed from the Material Acceleration and the Influence of the Viscous Term integration of material acceleration only Error of Reconstruction p = p Cal -p DNS is about 6% Pressure difference between methods (a) and (b) p a - p b integration of material acceleration and the viscous terms (b) Error of Reconstruction p = p Cal -p DNS is about 6% Relative difference mostly below 0.3% (maximum is about 3%) Conclusion: Contribution of the viscous term to pressure is negligible.

4 Forcing Term Plus Error: The Origin of the 6% Error in the Pressure Reconstructed from the Material Acceleration Same Difference between the two (Relative difference mostly below 0.3%) is about 6% Apply the reconstruction code Vector Map of the Forcing Term νδ Vector Map of the DNS Pressure Gradient Conclusion: The 6% error is due to the forcing term plus the error. Reconstruction does not introduce error.

5 Durability of Pressure Reconstruction Code with Artificially Introduced Noise Random error with amplitude of 200% of maximum acceleration introduced to a vertical strip in the DNS pressure gradient field DNS Pressure distribution integration of the noise-added DNS pressure gradient DNS Pressure distribution overlapped with noise-added DNS pressure gradient Error: p = p Cal -p DNS Conclusions: Error is local; Relative error mostly below 0.2% (Maximum is about 17%, i.e., at least one order of magnitude smaller than the error in acceleration). Reconstruction suppresses the error.

6 Durability of Pressure Reconstruction Code with Artificially Introduced Noise Random error with amplitude of 40% of maximum acceleration introduced to the entire DNS pressure gradient field DNS Pressure distribution integration of the noise-added DNS pressure gradient DNS Pressure distribution overlapped with noise-added DNS pressure gradient Error distribution: Perror=pCal-pDNS is about 7%

7 Conclusions The pressure reconstruction code is validated using a DNS database of forced isotropic turbulence. If the pressure gradient (measured acceleration) is right, the reconstructed pressure distribution is right. Reconstruction does not introduce error. Error propagation from acceleration to pressure is slow and mostly remained local. The reconstructed pressure error is al least one order of magnitude smaller than the acceleration error. Reconstruction suppresses the error.

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

MASSACHUSETTS INSTITUTE OF TECHNOLOGY. Analyzing wind flow around the square plate using ADINA Project. Ankur Bajoria

MASSACHUSETTS INSTITUTE OF TECHNOLOGY. Analyzing wind flow around the square plate using ADINA Project. Ankur Bajoria MASSACHUSETTS INSTITUTE OF TECHNOLOGY Analyzing wind flow around the square plate using ADINA 2.094 - Project Ankur Bajoria May 1, 2008 Acknowledgement I would like to thank ADINA R & D, Inc for the full

More information

Non-Newtonian Transitional Flow in an Eccentric Annulus

Non-Newtonian Transitional Flow in an Eccentric Annulus Tutorial 8. Non-Newtonian Transitional Flow in an Eccentric Annulus Introduction The purpose of this tutorial is to illustrate the setup and solution of a 3D, turbulent flow of a non-newtonian fluid. Turbulent

More information

Turbulencja w mikrokanale i jej wpływ na proces emulsyfikacji

Turbulencja w mikrokanale i jej wpływ na proces emulsyfikacji Polish Academy of Sciences Institute of Fundamental Technological Research Turbulencja w mikrokanale i jej wpływ na proces emulsyfikacji S. Błoński, P.Korczyk, T.A. Kowalewski PRESENTATION OUTLINE 0 Introduction

More information

Possibility of Implicit LES for Two-Dimensional Incompressible Lid-Driven Cavity Flow Based on COMSOL Multiphysics

Possibility of Implicit LES for Two-Dimensional Incompressible Lid-Driven Cavity Flow Based on COMSOL Multiphysics Possibility of Implicit LES for Two-Dimensional Incompressible Lid-Driven Cavity Flow Based on COMSOL Multiphysics Masanori Hashiguchi 1 1 Keisoku Engineering System Co., Ltd. 1-9-5 Uchikanda, Chiyoda-ku,

More information

ALE Seamless Immersed Boundary Method with Overset Grid System for Multiple Moving Objects

ALE Seamless Immersed Boundary Method with Overset Grid System for Multiple Moving Objects Tenth International Conference on Computational Fluid Dynamics (ICCFD10), Barcelona,Spain, July 9-13, 2018 ICCFD10-047 ALE Seamless Immersed Boundary Method with Overset Grid System for Multiple Moving

More information

High-Fidelity Simulation of Unsteady Flow Problems using a 3rd Order Hybrid MUSCL/CD scheme. A. West & D. Caraeni

High-Fidelity Simulation of Unsteady Flow Problems using a 3rd Order Hybrid MUSCL/CD scheme. A. West & D. Caraeni High-Fidelity Simulation of Unsteady Flow Problems using a 3rd Order Hybrid MUSCL/CD scheme ECCOMAS, June 6 th -11 th 2016, Crete Island, Greece A. West & D. Caraeni Outline Industrial Motivation Numerical

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

Coastal impact of a tsunami Review of numerical models

Coastal impact of a tsunami Review of numerical models Coastal impact of a tsunami Review of numerical models Richard Marcer 2 Content Physics to simulate Different approaches of modelling 2D depth average Full 3D Navier-Stokes 3D model Key point : free surface

More information

The Spalart Allmaras turbulence model

The Spalart Allmaras turbulence model The Spalart Allmaras turbulence model The main equation The Spallart Allmaras turbulence model is a one equation model designed especially for aerospace applications; it solves a modelled transport equation

More information

A Direct Simulation-Based Study of Radiance in a Dynamic Ocean

A Direct Simulation-Based Study of Radiance in a Dynamic Ocean 1 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. A Direct Simulation-Based Study of Radiance in a Dynamic Ocean LONG-TERM GOALS Dick K.P. Yue Center for Ocean Engineering

More information

MAE 3130: Fluid Mechanics Lecture 5: Fluid Kinematics Spring Dr. Jason Roney Mechanical and Aerospace Engineering

MAE 3130: Fluid Mechanics Lecture 5: Fluid Kinematics Spring Dr. Jason Roney Mechanical and Aerospace Engineering MAE 3130: Fluid Mechanics Lecture 5: Fluid Kinematics Spring 2003 Dr. Jason Roney Mechanical and Aerospace Engineering Outline Introduction Velocity Field Acceleration Field Control Volume and System Representation

More information

Tutorial: Modeling Liquid Reactions in CIJR Using the Eulerian PDF transport (DQMOM-IEM) Model

Tutorial: Modeling Liquid Reactions in CIJR Using the Eulerian PDF transport (DQMOM-IEM) Model Tutorial: Modeling Liquid Reactions in CIJR Using the Eulerian PDF transport (DQMOM-IEM) Model Introduction The purpose of this tutorial is to demonstrate setup and solution procedure of liquid chemical

More information

HPC Usage for Aerodynamic Flow Computation with Different Levels of Detail

HPC Usage for Aerodynamic Flow Computation with Different Levels of Detail DLR.de Folie 1 HPCN-Workshop 14./15. Mai 2018 HPC Usage for Aerodynamic Flow Computation with Different Levels of Detail Cornelia Grabe, Marco Burnazzi, Axel Probst, Silvia Probst DLR, Institute of Aerodynamics

More information

Turbulent Premixed Combustion with Flamelet Generated Manifolds in COMSOL Multiphysics

Turbulent Premixed Combustion with Flamelet Generated Manifolds in COMSOL Multiphysics Turbulent Premixed Combustion with Flamelet Generated Manifolds in COMSOL Multiphysics Rob J.M Bastiaans* Eindhoven University of Technology *Corresponding author: PO box 512, 5600 MB, Eindhoven, r.j.m.bastiaans@tue.nl

More information

Transition Flow and Aeroacoustic Analysis of NACA0018 Satish Kumar B, Fred Mendonç a, Ghuiyeon Kim, Hogeon Kim

Transition Flow and Aeroacoustic Analysis of NACA0018 Satish Kumar B, Fred Mendonç a, Ghuiyeon Kim, Hogeon Kim Transition Flow and Aeroacoustic Analysis of NACA0018 Satish Kumar B, Fred Mendonç a, Ghuiyeon Kim, Hogeon Kim Transition Flow and Aeroacoustic Analysis of NACA0018 Satish Kumar B, Fred Mendonç a, Ghuiyeon

More information

Aeroacoustic computations with a new CFD solver based on the Lattice Boltzmann Method

Aeroacoustic computations with a new CFD solver based on the Lattice Boltzmann Method Aeroacoustic computations with a new CFD solver based on the Lattice Boltzmann Method D. Ricot 1, E. Foquet 2, H. Touil 3, E. Lévêque 3, H. Machrouki 4, F. Chevillotte 5, M. Meldi 6 1: Renault 2: CS 3:

More information

Modeling Evaporating Liquid Spray

Modeling Evaporating Liquid Spray Tutorial 16. Modeling Evaporating Liquid Spray Introduction In this tutorial, FLUENT s air-blast atomizer model is used to predict the behavior of an evaporating methanol spray. Initially, the air flow

More information

Second Symposium on Hybrid RANS-LES Methods, 17/18 June 2007

Second Symposium on Hybrid RANS-LES Methods, 17/18 June 2007 1 Zonal-Detached Eddy Simulation of Transonic Buffet on a Civil Aircraft Type Configuration V.BRUNET and S.DECK Applied Aerodynamics Department The Buffet Phenomenon Aircraft in transonic conditions Self-sustained

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

Simulation of Turbulent Flow over the Ahmed Body

Simulation of Turbulent Flow over the Ahmed Body Simulation of Turbulent Flow over the Ahmed Body 58:160 Intermediate Mechanics of Fluids CFD LAB 4 By Timur K. Dogan, Michael Conger, Maysam Mousaviraad, and Fred Stern IIHR-Hydroscience & Engineering

More information

Direct Numerical Simulation of a Low Pressure Turbine Cascade. Christoph Müller

Direct Numerical Simulation of a Low Pressure Turbine Cascade. Christoph Müller Low Pressure NOFUN 2015, Braunschweig, Overview PostProcessing Experimental test facility Grid generation Inflow turbulence Conclusion and slide 2 / 16 Project Scale resolving Simulations give insight

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

Effect of initial turbulence intensity and velocity profile on liquid jets for IFE beamline protection

Effect of initial turbulence intensity and velocity profile on liquid jets for IFE beamline protection Effect of initial turbulence intensity and velocity profile on liquid jets for IFE beamline protection A. Konkachbaev, N.B. Morley and M. A. Abdou Mechanical and Aerospace Engineering Department, UCLA

More information

ITTC Recommended Procedures and Guidelines

ITTC Recommended Procedures and Guidelines Page 1 of 9 Table of Contents 1. OVERVIEW... 2 2. CHOICE OF MODEL OR FULL SCALE... 2 3. NOMINAL WAKE IN MODEL SCALE... 3 3.1 Pre-processing... 3 3.1.1 Geometry... 3 3.1.2 Computational Domain and Boundary

More information

Use 6DOF solver to calculate motion of the moving body. Create TIFF files for graphic visualization of the solution.

Use 6DOF solver to calculate motion of the moving body. Create TIFF files for graphic visualization of the solution. Introduction The purpose of this tutorial is to provide guidelines and recommendations for setting up and solving a moving deforming mesh (MDM) case along with the six degree of freedom (6DOF) solver and

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

Ail implicit finite volume nodal point scheme for the solution of two-dimensional compressible Navier-Stokes equations

Ail implicit finite volume nodal point scheme for the solution of two-dimensional compressible Navier-Stokes equations Ail implicit finite volume nodal point scheme for the solution of two-dimensional compressible Navier-Stokes equations Vimala Dutta Computational and Theoretical Fluid Dynamics Division National Aerospace

More information

Flat-Plate As stated earlier, the purpose of the flat-plate study was to create an opportunity for side-by-side comparison of ÒfastÓ RNG and

Flat-Plate As stated earlier, the purpose of the flat-plate study was to create an opportunity for side-by-side comparison of ÒfastÓ RNG and Chapter Six: Comparison of Turbulence Models Performance Comparisons There are a number of criteria by which to judge turbulence models. One criterion sometimes important to mathematicallyminded model

More information

A TSTT integrated FronTier code and its applications in computational fluid physics

A TSTT integrated FronTier code and its applications in computational fluid physics Institute of Physics Publishing Journal of Physics: Conference Series 16 (2005) 471 475 doi:10.1088/1742-6596/16/1/064 SciDAC 2005 A TSTT integrated FronTier code and its applications in computational

More information

Driven Cavity Example

Driven Cavity Example BMAppendixI.qxd 11/14/12 6:55 PM Page I-1 I CFD Driven Cavity Example I.1 Problem One of the classic benchmarks in CFD is the driven cavity problem. Consider steady, incompressible, viscous flow in a square

More information

P. K. Yeung Georgia Tech,

P. K. Yeung Georgia Tech, Progress in Petascale Computations of Turbulence at high Reynolds number P. K. Yeung Georgia Tech, pk.yeung@ae.gatech.edu Blue Waters Symposium NCSA, Urbana-Champaign, May 2014 Thanks... NSF: PRAC and

More information

On the coupling of advanced modelling methods for big data generation on realistic aerodynamics flows

On the coupling of advanced modelling methods for big data generation on realistic aerodynamics flows On the coupling of advanced modelling methods for big data generation on realistic aerodynamics flows Pierre-Elie WEISS Applied Aerodynamics Department Missiles Hypersonic Launchers Unit Multiphysics and

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

High-order solutions of transitional flow over the SD7003 airfoil using compact finite-differencing and filtering

High-order solutions of transitional flow over the SD7003 airfoil using compact finite-differencing and filtering High-order solutions of transitional flow over the SD7003 airfoil using compact finite-differencing and filtering Daniel J. Garmann and Miguel R. Visbal Air Force Research Laboratory, Wright-Patterson

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

Large Eddy Simulation of Flow over a Backward Facing Step using Fire Dynamics Simulator (FDS)

Large Eddy Simulation of Flow over a Backward Facing Step using Fire Dynamics Simulator (FDS) The 14 th Asian Congress of Fluid Mechanics - 14ACFM October 15-19, 2013; Hanoi and Halong, Vietnam Large Eddy Simulation of Flow over a Backward Facing Step using Fire Dynamics Simulator (FDS) Md. Mahfuz

More information

Flow Over Cylinder. Gönül Öykü Güngör Department of Mechanical Engineering Bilkent University Ankara, Turkey

Flow Over Cylinder. Gönül Öykü Güngör Department of Mechanical Engineering Bilkent University Ankara, Turkey Flow Over Cylinder Gönül Öykü Güngör Department of Mechanical Engineering Bilkent University Ankara, Turkey Abstract CFD analysis of flow over a cylinder for different Reynolds Numbers is explained in

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

Quantifying the Dynamic Ocean Surface Using Underwater Radiometric Measurement

Quantifying the Dynamic Ocean Surface Using Underwater Radiometric Measurement DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Quantifying the Dynamic Ocean Surface Using Underwater Radiometric Measurement Lian Shen Department of Mechanical Engineering

More information

Numerical Simulation of Coastal Wave Processes with the Use of Smoothed Particle Hydrodynamics (SPH) Method

Numerical Simulation of Coastal Wave Processes with the Use of Smoothed Particle Hydrodynamics (SPH) Method Aristotle University of Thessaloniki Faculty of Engineering Department of Civil Engineering Division of Hydraulics and Environmental Engineering Laboratory of Maritime Engineering Christos V. Makris Dipl.

More information

A Study of the Development of an Analytical Wall Function for Large Eddy Simulation of Turbulent Channel and Rectangular Duct Flow

A Study of the Development of an Analytical Wall Function for Large Eddy Simulation of Turbulent Channel and Rectangular Duct Flow University of Wisconsin Milwaukee UWM Digital Commons Theses and Dissertations August 2014 A Study of the Development of an Analytical Wall Function for Large Eddy Simulation of Turbulent Channel and Rectangular

More information

MULTIRESOLUTION. APPROACHES in TURBULENCE. MULHSCALf and. Applications. LES, DES and Hybrid. 2nd Edition. RANS/LES Methods and Guidelines

MULTIRESOLUTION. APPROACHES in TURBULENCE. MULHSCALf and. Applications. LES, DES and Hybrid. 2nd Edition. RANS/LES Methods and Guidelines 2nd Edition MULHSCALf and MULTIRESOLUTION APPROACHES in TURBULENCE LES, DES and Hybrid Applications RANS/LES Methods and Guidelines Pierre Sagaut Uniuersite Pierre et Marie Curie-Paris 6, France Sebastien

More information

Modeling Evaporating Liquid Spray

Modeling Evaporating Liquid Spray Tutorial 17. Modeling Evaporating Liquid Spray Introduction In this tutorial, the air-blast atomizer model in ANSYS FLUENT is used to predict the behavior of an evaporating methanol spray. Initially, the

More information

Simulations of the vortex in the Dellenback abrupt expansion, resembling a hydro turbine draft tube operating at part-load

Simulations of the vortex in the Dellenback abrupt expansion, resembling a hydro turbine draft tube operating at part-load Simulations of the vortex in the Dellenback abrupt expansion, resembling a hydro turbine draft tube operating at part-load H Nilsson Chalmers University of Technology, SE-412 96 Gothenburg, Sweden E-mail:

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 Investigation of Transonic Shock Oscillations on Stationary Aerofoils

Numerical Investigation of Transonic Shock Oscillations on Stationary Aerofoils Numerical Investigation of Transonic Shock Oscillations on Stationary Aerofoils A. Soda, T. Knopp, K. Weinman German Aerospace Center DLR, Göttingen/Germany Symposium on Hybrid RANS-LES Methods Stockholm/Sweden,

More information

A Direct Simulation-Based Study of Radiance in a Dynamic Ocean

A Direct Simulation-Based Study of Radiance in a Dynamic Ocean A Direct Simulation-Based Study of Radiance in a Dynamic Ocean Lian Shen Department of Civil Engineering Johns Hopkins University Baltimore, MD 21218 phone: (410) 516-5033 fax: (410) 516-7473 email: LianShen@jhu.edu

More information

COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF ORIFICE PLATE METERING SITUATIONS UNDER ABNORMAL CONFIGURATIONS

COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF ORIFICE PLATE METERING SITUATIONS UNDER ABNORMAL CONFIGURATIONS COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF ORIFICE PLATE METERING SITUATIONS UNDER ABNORMAL CONFIGURATIONS Dr W. Malalasekera Version 3.0 August 2013 1 COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF ORIFICE PLATE

More information

DES Turbulence Modeling for ICE Flow Simulation in OpenFOAM

DES Turbulence Modeling for ICE Flow Simulation in OpenFOAM 2 nd Two-day Meeting on ICE Simulations Using OpenFOAM DES Turbulence Modeling for ICE Flow Simulation in OpenFOAM V. K. Krastev 1, G. Bella 2 and G. Campitelli 1 University of Tuscia, DEIM School of Engineering

More information

LES Analysis on Shock-Vortex Ring Interaction

LES Analysis on Shock-Vortex Ring Interaction LES Analysis on Shock-Vortex Ring Interaction Yong Yang Jie Tang Chaoqun Liu Technical Report 2015-08 http://www.uta.edu/math/preprint/ LES Analysis on Shock-Vortex Ring Interaction Yong Yang 1, Jie Tang

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

Continued Investigation of Small-Scale Air-Sea Coupled Dynamics Using CBLAST Data

Continued Investigation of Small-Scale Air-Sea Coupled Dynamics Using CBLAST Data Continued Investigation of Small-Scale Air-Sea Coupled Dynamics Using CBLAST Data Dick K.P. Yue Center for Ocean Engineering Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge,

More information

The viscous forces on the cylinder are proportional to the gradient of the velocity field at the

The viscous forces on the cylinder are proportional to the gradient of the velocity field at the Fluid Dynamics Models : Flow Past a Cylinder Flow Past a Cylinder Introduction The flow of fluid behind a blunt body such as an automobile is difficult to compute due to the unsteady flows. The wake behind

More information

WALL Y + APPROACH FOR DEALING WITH TURBULENT FLOW OVER A SURFACE MOUNTED CUBE: PART 2 HIGH REYNOLDS NUMBER

WALL Y + APPROACH FOR DEALING WITH TURBULENT FLOW OVER A SURFACE MOUNTED CUBE: PART 2 HIGH REYNOLDS NUMBER Seventh International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia 9- December 9 WALL Y + APPROACH FOR DEALING WITH TURBULENT FLOW OVER A SURFACE MOUNTED CUBE: PART

More information

URANS and SAS analysis of flow dynamics in a GDI nozzle

URANS and SAS analysis of flow dynamics in a GDI nozzle , 3rd Annual Conference on Liquid Atomization and Spray Systems, Brno, Czech Republic, September 010 J.-M. Shi*, K. Wenzlawski*, J. Helie, H. Nuglisch, J. Cousin * Continental Automotive GmbH Siemensstr.

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

Direct Numerical Simulation of Turbulent Boundary Layers at High Reynolds Numbers.

Direct Numerical Simulation of Turbulent Boundary Layers at High Reynolds Numbers. Direct Numerical Simulation of Turbulent Boundary Layers at High Reynolds Numbers. G. Borrell, J.A. Sillero and J. Jiménez, Corresponding author: guillem@torroja.dmt.upm.es School of Aeronautics, Universidad

More information

Tutorial 1. Introduction to Using FLUENT: Fluid Flow and Heat Transfer in a Mixing Elbow

Tutorial 1. Introduction to Using FLUENT: Fluid Flow and Heat Transfer in a Mixing Elbow Tutorial 1. Introduction to Using FLUENT: Fluid Flow and Heat Transfer in a Mixing Elbow Introduction This tutorial illustrates the setup and solution of the two-dimensional turbulent fluid flow and heat

More information

A Direct Simulation-Based Study of Radiance in a Dynamic Ocean

A Direct Simulation-Based Study of Radiance in a Dynamic Ocean A Direct Simulation-Based Study of Radiance in a Dynamic Ocean Dick K.P. Yue Center for Ocean Engineering Massachusetts Institute of Technology Room 5-321, 77 Massachusetts Ave, Cambridge, MA 02139 phone:

More information

INTERACTION BETWEEN TURBULENT DYNAMICAL PROCESSES AND STATISTICS IN DEFORMED AIR-LIQUID INTERFACES, VIA DNS

INTERACTION BETWEEN TURBULENT DYNAMICAL PROCESSES AND STATISTICS IN DEFORMED AIR-LIQUID INTERFACES, VIA DNS INTERACTION BETWEEN TURBULENT DYNAMICAL PROCESSES AND STATISTICS IN DEFORMED AIR-LIQUID INTERFACES, VIA DNS Yoshinobu Yamamoto Department of Nuclear Engineering, Kyoto University Yoshida Sakyo Kyoto, 66-85,

More information

Animation of Fluids. Animating Fluid is Hard

Animation of Fluids. Animating Fluid is Hard Animation of Fluids Animating Fluid is Hard Too complex to animate by hand Surface is changing very quickly Lots of small details In short, a nightmare! Need automatic simulations AdHoc Methods Some simple

More information

Numerical Simulation Study on Aerodynamic Characteristics of the High Speed Train under Crosswind

Numerical Simulation Study on Aerodynamic Characteristics of the High Speed Train under Crosswind 2017 2nd International Conference on Industrial Aerodynamics (ICIA 2017) ISBN: 978-1-60595-481-3 Numerical Simulation Study on Aerodynamic Characteristics of the High Speed Train under Crosswind Fan Zhao,

More information

Large Eddy Simulation of Turbulent Flow Past a Bluff Body using OpenFOAM

Large Eddy Simulation of Turbulent Flow Past a Bluff Body using OpenFOAM Large Eddy Simulation of Turbulent Flow Past a Bluff Body using OpenFOAM A Thesis Presented By David Joseph Hensel To The Department of Mechanical and Industrial Engineering in partial fulfillment of the

More information

Chapter 1 Introduction

Chapter 1 Introduction Chapter 1 Introduction Ibrahim Sezai Department of Mechanical Engineering Eastern Mediterranean University Fall 2009-2010 What is CFD? CFD is the simulation of fluids engineering systems using modeling

More information

intermittency, mixing, and dispersion High-Resolution Simulations of Turbulence: Supported by NSF (CTS)

intermittency, mixing, and dispersion High-Resolution Simulations of Turbulence: Supported by NSF (CTS) High-Resolution Simulations of Turbulence: intermittency, mixing, and dispersion P.K. Yeung and Diego A. Donzis School of Aero. Engr., Georgia Tech, Atlanta, GA pk.yeung@ae.gatech.edu Close collaborators:

More information

Optimizing Building Geometry to Increase the Energy Yield in the Built Environment

Optimizing Building Geometry to Increase the Energy Yield in the Built Environment Cornell University Laboratory for Intelligent Machine Systems Optimizing Building Geometry to Increase the Energy Yield in the Built Environment Malika Grayson Dr. Ephrahim Garcia Laboratory for Intelligent

More information

VI Workshop Brasileiro de Micrometeorologia

VI Workshop Brasileiro de Micrometeorologia Validation of a statistic algorithm applied to LES model Eduardo Bárbaro, Amauri Oliveira, Jacyra Soares November 2009 Index Objective 1 Objective 2 3 Vertical Profiles Flow properties 4 Objective 1 The

More information

Probing urban canopy dynamics using direct numerical simulations (DNS) O. Coceal1a, T.G. Thomas2 & S.E. Belcher1 1Department aemail: of Meteorology, University of Reading, UK, 2School of Engineering Sciences,

More information

Using the Eulerian Multiphase Model for Granular Flow

Using the Eulerian Multiphase Model for Granular Flow Tutorial 21. Using the Eulerian Multiphase Model for Granular Flow Introduction Mixing tanks are used to maintain solid particles or droplets of heavy fluids in suspension. Mixing may be required to enhance

More information

Flow structure and air entrainment mechanism in a turbulent stationary bore

Flow structure and air entrainment mechanism in a turbulent stationary bore Flow structure and air entrainment mechanism in a turbulent stationary bore Javier Rodríguez-Rodríguez, Alberto Aliseda and Juan C. Lasheras Department of Mechanical and Aerospace Engineering University

More information

Modeling Supersonic Jet Screech Noise Using Direct Computational Aeroacoustics (CAA) 14.5 Release

Modeling Supersonic Jet Screech Noise Using Direct Computational Aeroacoustics (CAA) 14.5 Release Modeling Supersonic Jet Screech Noise Using Direct Computational Aeroacoustics (CAA) 14.5 Release 2011 ANSYS, Inc. November 7, 2012 1 Workshop Advanced ANSYS FLUENT Acoustics Introduction This tutorial

More information

Introduction To FLUENT. David H. Porter Minnesota Supercomputer Institute University of Minnesota

Introduction To FLUENT. David H. Porter Minnesota Supercomputer Institute University of Minnesota Introduction To FLUENT David H. Porter Minnesota Supercomputer Institute University of Minnesota Topics Covered in this Tutorial What you can do with FLUENT FLUENT is feature rich Summary of features and

More information

Comparison of a two-dimensional viscid and inviscid model for rotating stall analysis

Comparison of a two-dimensional viscid and inviscid model for rotating stall analysis Comparison of a two-dimensional viscid and inviscid model for rotating stall analysis S. LJEVAR, H.C. DE LANGE, A.A. VAN STEENHOVEN Department of Mechanical Engineering Eindhoven University of Technology

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

Artificial diffusivity/viscosity in Eulerian models. Models in intrinsic coordinate?

Artificial diffusivity/viscosity in Eulerian models. Models in intrinsic coordinate? Energetics of mixing Artificial diffusivity/viscosity in Eulerian models Models in intrinsic coordinate? Rui Xin Huang Woods Hole Oceanographic Institution Woods Hole, USA Ocean circulation is maintained

More information

Express Introductory Training in ANSYS Fluent Workshop 07 Tank Flushing

Express Introductory Training in ANSYS Fluent Workshop 07 Tank Flushing Express Introductory Training in ANSYS Fluent Workshop 07 Tank Flushing Dimitrios Sofialidis Technical Manager, SimTec Ltd. Mechanical Engineer, PhD PRACE Autumn School 2013 - Industry Oriented HPC Simulations,

More information

ON THE NUMERICAL MODELING OF IMPINGING JET HEAT TRANSFER

ON THE NUMERICAL MODELING OF IMPINGING JET HEAT TRANSFER ON THE NUMERICAL MODELING OF IMPINGING JET HEAT TRANSFER Mirko Bovo 1,2, Sassan Etemad 2 and Lars Davidson 1 1 Dept. of Applied Mechanics, Chalmers University of Technology, Gothenburg, Sweden 2 Powertrain

More information

LES Applications in Aerodynamics

LES Applications in Aerodynamics LES Applications in Aerodynamics Kyle D. Squires Arizona State University Tempe, Arizona, USA 2010 Tutorial School on Fluid Dynamics: Topics in Turbulence Center for Scientific Computation and Mathematical

More information

Surge Protector. Esma Khatun

Surge Protector. Esma Khatun Surge Protector Esma Khatun 1.04.17 Overall Size Electronic Usage Use of electronic equipment has increased Overall size of the equipment has decreased TIME Smaller more compact electronic devices have

More information

Investigation of Lagrangian Coherent Structures. - To Understand and Identify Turbulence JOHAN JAKOBSSON

Investigation of Lagrangian Coherent Structures. - To Understand and Identify Turbulence JOHAN JAKOBSSON Investigation of Lagrangian Coherent Structures - To Understand and Identify Turbulence JOHAN JAKOBSSON Department of Chemical and Biological Engineering Division of Chemical Reaction Engineering CHALMERS

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

EVALUATION OF A GENERAL CFD-SOLVER FOR A MICRO-SCALE URBAN FLOW

EVALUATION OF A GENERAL CFD-SOLVER FOR A MICRO-SCALE URBAN FLOW EVALATION OF A GENERAL CFD-SOLVER FOR A MICRO-SCALE RBAN FLOW Jarkko Saloranta and Antti Hellsten Helsinki niversity of Technology, Laboratory of Aerodynamics, Finland INTRODCTION In this work we study

More information

Reproducibility of Complex Turbulent Flow Using Commercially-Available CFD Software

Reproducibility of Complex Turbulent Flow Using Commercially-Available CFD Software Reports of Research Institute for Applied Mechanics, Kyushu University No.150 (71 83) March 2016 Reproducibility of Complex Turbulent Flow Using Commercially-Available CFD Software Report 3: For the Case

More information

Modeling a Nozzle in a Borehole

Modeling a Nozzle in a Borehole Modeling a Nozzle in a Borehole E. Holzbecher, F. Sun Georg-August Universität Göttingen *Goldschmidtstr. 3, 37077 Göttingen, GERMANY; E-mail: eholzbe@gwdg.de Abstract: A nozzle, installed in an injecting

More information

CFD Analysis of a Fully Developed Turbulent Flow in a Pipe with a Constriction and an Obstacle

CFD Analysis of a Fully Developed Turbulent Flow in a Pipe with a Constriction and an Obstacle CFD Analysis of a Fully Developed Turbulent Flow in a Pipe with a Constriction and an Obstacle C, Diyoke Mechanical Engineering Department Enugu State University of Science & Tech. Enugu, Nigeria U, Ngwaka

More information

THE INFLUENCE OF ROTATING DOMAIN SIZE IN A ROTATING FRAME OF REFERENCE APPROACH FOR SIMULATION OF ROTATING IMPELLER IN A MIXING VESSEL

THE INFLUENCE OF ROTATING DOMAIN SIZE IN A ROTATING FRAME OF REFERENCE APPROACH FOR SIMULATION OF ROTATING IMPELLER IN A MIXING VESSEL Journal of Engineering Science and Technology Vol. 2, No. 2 (2007) 126-138 School of Engineering, Taylor s University College THE INFLUENCE OF ROTATING DOMAIN SIZE IN A ROTATING FRAME OF REFERENCE APPROACH

More information

CFD STUDY OF MIXING PROCESS IN RUSHTON TURBINE STIRRED TANKS

CFD STUDY OF MIXING PROCESS IN RUSHTON TURBINE STIRRED TANKS Third International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia 10-12 December 2003 CFD STUDY OF MIXING PROCESS IN RUSHTON TURBINE STIRRED TANKS Guozhong ZHOU 1,2,

More information

Module 3: Velocity Measurement Lecture 14: Analysis of PIV data. The Lecture Contains: Flow Visualization. Test Cell Flow Quality

Module 3: Velocity Measurement Lecture 14: Analysis of PIV data. The Lecture Contains: Flow Visualization. Test Cell Flow Quality The Lecture Contains: Flow Visualization Test Cell Flow Quality Influence of End-Plates Introduction To Data Analysis Principle of Operation of PIV Various Aspects of PIV Measurements Recording of the

More information

Coupling of STAR-CCM+ to Other Theoretical or Numerical Solutions. Milovan Perić

Coupling of STAR-CCM+ to Other Theoretical or Numerical Solutions. Milovan Perić Coupling of STAR-CCM+ to Other Theoretical or Numerical Solutions Milovan Perić Contents The need to couple STAR-CCM+ with other theoretical or numerical solutions Coupling approaches: surface and volume

More information

Lab 8: FLUENT: Turbulent Boundary Layer Flow with Convection

Lab 8: FLUENT: Turbulent Boundary Layer Flow with Convection Lab 8: FLUENT: Turbulent Boundary Layer Flow with Convection Objective: The objective of this laboratory is to use FLUENT to solve for the total drag and heat transfer rate for external, turbulent boundary

More information

Using Multiple Rotating Reference Frames

Using Multiple Rotating Reference Frames Tutorial 9. Using Multiple Rotating Reference Frames Introduction Many engineering problems involve rotating flow domains. One example is the centrifugal blower unit that is typically used in automotive

More information

CHAPTER 3 WAVEFRONT RECONSTRUCTION METHODS. 3.1 Spatial Correlation Method

CHAPTER 3 WAVEFRONT RECONSTRUCTION METHODS. 3.1 Spatial Correlation Method CHAPTER 3 WAVEFRONT RECONSTRUCTION METHODS Pierce [9] defines a wavefront as any moving surface along which a waveform feature is being simultaneously received. The first step in performing ray tracing

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

Turbulence et Génération de Bruit Equipe de recherche du Centre Acoustique LMFA, UMR CNRS 5509, Ecole Centrale de Lyon Simulation Numérique en Aéroacoustique Institut Henri Poincaré - 16 novembre 2006

More information

Interpolation error in DNS simulations of turbulence: consequences for particle tracking

Interpolation error in DNS simulations of turbulence: consequences for particle tracking Journal of Physics: Conference Series Interpolation error in DNS simulations of turbulence: consequences for particle tracking To cite this article: M A T van Hinsberg et al 2011 J. Phys.: Conf. Ser. 318

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

LAGRANGIAN PARTICLE TRACKING IN ISOTROPIC TURBULENT FLOW VIA HOLOGRAPHIC AND INTENSITY BASED STEREOSCOPY. By Kamran Arjomand

LAGRANGIAN PARTICLE TRACKING IN ISOTROPIC TURBULENT FLOW VIA HOLOGRAPHIC AND INTENSITY BASED STEREOSCOPY. By Kamran Arjomand LAGRANGIAN PARTICLE TRACKING IN ISOTROPIC TURBULENT FLOW VIA HOLOGRAPHIC AND INTENSITY BASED STEREOSCOPY By Kamran Arjomand I. Background A. Holographic Imaging 1. Acquire Hologram 3. Numerical Reconstruction

More information

Investigation of cross flow over a circular cylinder at low Re using the Immersed Boundary Method (IBM)

Investigation of cross flow over a circular cylinder at low Re using the Immersed Boundary Method (IBM) Computational Methods and Experimental Measurements XVII 235 Investigation of cross flow over a circular cylinder at low Re using the Immersed Boundary Method (IBM) K. Rehman Department of Mechanical Engineering,

More information

Inviscid Flows. Introduction. T. J. Craft George Begg Building, C41. The Euler Equations. 3rd Year Fluid Mechanics

Inviscid Flows. Introduction. T. J. Craft George Begg Building, C41. The Euler Equations. 3rd Year Fluid Mechanics Contents: Navier-Stokes equations Inviscid flows Boundary layers Transition, Reynolds averaging Mixing-length models of turbulence Turbulent kinetic energy equation One- and Two-equation models Flow management

More information