Introducing HELYX Professional Open Source CFD

Transcription

1 Introducing HELYX Professional Open Source CFD Eugene de Villiers Managing Director, Engys Ltd. October 2014 Tel: +44 (0) Fax: +44 (0)

2 Contents About ENGYS Vision Overview HELYX GUI HELYX Core HELYX Add-on Modules Future

3 Company Overview CAE products and services Focus on Open Source solutions Solution platforms: CFD HELYX / OPENFOAM MDO DAKOTA GUI HELYX-GUI / HELYX-OS History: 2009 founded in the UK 2010 present 5 offices worldwide 2012 Joint Venture with ARC 2013 resellers Japan and Benelux 2013 resellers Korea and China OPENFOAM is a trademark of OPENCFD (ESI Group).

4 Company Locations ENGYS Offices UK, Germany, Italy, USA, Australia Resellers Japan, Benelux, Korea, China

5 Some of our Customers Automotive & Racing HandfordResearch Transport Building & HVAC Process & Manufacturing Energy

6 Contents About ENGYS Vision Overview HELYX GUI HELYX Core HELYX Add-on Modules Future

7 Vision Professional Quality + Open Source Solvers Quality: Fast, accurate, reliable Best in class user support Ease of use Open Core (GPL): Free to examine/critique Free to contribute/modify No restrictions on parallel or number of jobs Any platform, any machine, any time, anywhere

8 Vision Leverage Open Source to improve Quality Integrate contributions from 100 s of community developers Faster update/development cycle Common platform for 3 rd -party add-on s Provide revenue sharing opportunities Resellers Developers

9 Contents About ENGYS Vision Overview HELYX GUI HELYX Core HELYX Add-on Modules Future

10 Products Overview HELYX OS Open Source GUI for OPENFOAM HELYX Advanced CFD Software Suite ELEMENTS CAE Package for Automotive Design Free Download via SourceForge User Support and Documentation Developed by Engys and Auto Research Center OPENFOAM is a trademark of OPENCFD (ESI Group).

11 Overview Comprehensive CFD software solution for industry based on proven Open Source technologies Native read/write of FOAM files Linux and Windows ports Flexible architecture: HELYX, HELYX-Mesh, HELYX-SAS Modular add-on s OPENFOAM is a trademark of OPENCFD (ESI Group).

12 Contents About ENGYS Vision Overview HELYX GUI HELYX Core HELYX Add-on Modules Future

13 Demo

14 Feature List Built on HELYX Core 2.2 Automatic hex-dominant parallel meshing Geometry, mesh & field interactive 3D visualisation Windows and Linux support Custom editor for user defined entries Majority of settings and boundary conditions accessible Comprehensive best practices

15 Solvers: single phase Feature List incompressible/compressible thermal/buoyant/radiation multiphase (VOF/Euler/Lagrangian) Tools: Mesh merging/subsetting Zone definition Field mapping/initialisation Monitoring

16 Contents About ENGYS Vision Overview HELYX GUI HELYX Core Modules Future

17 CORE Overview Fully Open Source and GPL compliant Extension of publicly available repository Improved usability & application specific utility Increased accuracy & speed Better reliability Latest release based on v2.2.x now available v2.3 due Q (now in beta testing)

18 CORE Base Functionality Enhanced automatic parallel hex-based meshing tool Wide range of solvers: Compressible/incompressible RAS/DES/LES Thermal/buoyancy/radiation/passive scalars Multiphase: VOF/Euler-Euler/Lagrangian/Mixtures Multi-physics: CHT/Stress-FSI/Chemistry/Combustion Extensive toolset Pre-processing, mesh manipulation, monitoring, post-processing Comprehensive list of source terms and boundaries UDF capability

19 CORE Extensions (1) Single file parallel casesetup utility for batch execution Extensive built-environment and HVAC specific features 3 rd party module integration and coupling Improved solver speed and stability (DES, VOF, CHT) Improved, fully integrated radiation (thermal and solar) 50+ new and improved boundary conditions Transparent baffle CHT Speed-up > x50

20 CORE Extensions (2) Improved SIMPLE algorithm 2 nd -order accurate p-u boundaries Knop model consistent wall functions (Spalart-Allmaras, k-omegasst) Improved LES/DES convection schemes New post-processing and monitoring options Multiple bug fixes and core system enhancements... Std. Rhie-Chow U = 0.3 Choi s MMIM

21 Contents About ENGYS Vision Overview HELYX GUI HELYX Core HELYX Add-on Modules Future

22 Modules Overview Advanced add-on solver packages for HELYX & ELEMENTS Developed by specialists independent development partners Full GUI/User support Currently available: Fully implicit block coupled solvers Adjoint: topology and shape optimisation Hydro: enhanced multi-phase environment EcoMarine: rapid ship evaluation PEM (Polyhedral Element Method)

23 Contents About ENGYS Vision Overview HELYX GUI HELYX Core HELYX Add-on Modules Coupled Solver Future

24 Coupled Features Fully implicit block coupled solver Profs. L. Mangani & M. Darwish Block GAMG, Block pre-conditioning, Block turbulence Incompressible single phase Steady/Transient Mesh motion, MRF, Porous Fully integrated with GUI and core setup tools Heavily validated and optimised Verified best practices

25 Coupled Single Channel Pump Performance characterisation Steady state + frozen rotor 4 mesh sizes Parallel scaling Transient with sliding interface 5 time-step sizes 2 rotation speeds

26 Speed-up vs. Segregated Steady state + MRF Coupled Single Channel Pump k- SST Min scaling >8x Max scaling ~13.5x Mean scaling ~10x Similar parallel scaling to segregated Results comparable 83% (S) vs. 84% (C) pump efficiency k 750k 4 1.9M 2 4.7M CPU cores

27 Coupled Single Channel Pump Transient with sliding interface 500k cells, 12 cores, different time step sizes = rads/s Case name [ ] Max Effici ency [%] Mean Efficiency (final 3 revs) [%] Clock Time [s] Speedup Segregated X1 Coupled X Coupled X Coupled X Coupled X Coupled X

28 Coupled Single Channel Pump Transient with sliding interface 1.9 M cells = rads/s ~accuracy and >speed vs. commercial coupled solver

29 Grid size scaling Coupled Generic F1 3D incompressible U = 70 m/s k- SST Rotating wheels Moving ground 16, 24, 33 & 66 M cells Symmetry plane 120 cores Thanks to Samuel Silva for providing the model

30 Coupled Generic F1 Comparative results: C p & w Coupled Segregated

31 Speed-up vs. Segregated Relative Run Time Coupled Generic F1 Grid size scaling Coupled Segregated Linear Relative Grid Size Slightly better for large mesh 13-15x speed-up Mesh Size (millions)

32 Coupled Summary Now available as plug-in for HELYX Up to 200x faster convergence than segregated (esp. high aspect ratio cells, e.g. wings) Excellent grid size and parallel scaling More accurate, more robust (fewer failed runs) Competitive with best-in-class commercial alternatives

33 Contents About ENGYS Vision Overview HELYX GUI HELYX Core Modules Adjoint Future

34 Adjoint Fast gradient based optimisation 2 nd order accuracy Turbulence handling: Spalart Allmaras, k-eps, frozen turbulence MRF and porous media support Immersed boundary for interface tracking Multi-objective: forces & moments, uniformity, pressure loss, massflow split, swirl, wall shear stress, etc No expert knowledge required

35 Adjoint Topology: Simple Duct Specify design space and inlet/outlet interfaces Define optimisation objectives Run single simulation Output optimised shape 50% Pressure Loss

36 Adjoint Topology: Simple Duct

37 Adjoint Topology: Examples Volkswagen Group [U. Giffhorn] [M. Tomecki] [R. Niederlein] [N. Peller] [C. Ehlers, K. Arntz] [U. Giffhorn] [M. Towara]

38 DRIVAER example Adjoint Shape Generic car shape based on BMW and Audi cars Steady state RANS Drag force minimisation Output surface sensitivity Vehicle Optimisation available for ELEMENTS (Thanks to TU Munich for providing the geometry*) * A. I. Heft, T. Indinger, N. A. Adams: Introduction of a New Realistic Generic Car Model for Aerodynamic Investigations, SAE 2012 World Congress, April 23-26, 2012, Detroit, Michigan, USA, Paper

39 Adjoint Shape: DRIVAER

40 Adjoint Shape: DRIVAER 2 nd order 1 st order

41 Adjoint Shape: Examples Volkswagen Group red: inwards for smaller drag blue: outwards

42 Adjoint Roadmap Integrated Surface morphing Carat++ plug-inn from FEMopt Revolutionary FEM based surface morphing framework smart filtering & feature preservation proven performance Improved immersed boundaries Adjoint Turbulence Adjoint thermal and species Adjoint CHT

43 Contents About ENGYS Vision Overview HELYX GUI HELYX Core Modules EcoMarine Future

44 ECOMARINE Fast ship resistance, sinkage and trim predictor Kevin Maki (U. Michigan) & Engys Wave and viscous drag >100 times faster than VOF based methods DAKOTA/Blender for optimisation Robustness and accuracy enhancements unstructured grids Automated stabilisation Extensive validation Robust best practices

45 ECOMARINE KCS Hull Validation Gothenburg Case 2.2a Fn 0.26, grids: 448K, 949K 3019K cells Wave Elevation (Fn 0.26)

46 Contents About ENGYS Vision Overview HELYX GUI HELYX Core Modules Hydro Future

47 Hydro Enhanced VOF Solver CSIR South Africa Features: Compressible gas phase New density intensive pressure interpolation Level-set based curvature calculation for improved surface tension prediction Heterogeneous porosity implementation Thermal/Evaporation Enhanced Mesh Motion

48 Hydro Features Density intensive pressure interpolation Improved stability Reduces non-physical velocities on non-orthogonal meshes Parasitic current reduced by order of magnitude

49 Hydro Features Level-set based surface tension Reduced parasitic currents Improved surface tension accuracy

50 Example applications: Micro-fluidics Costal engineering Marine engineering Sea-keeping Tank sloshing Structure loading Rheology... Hydro Applications

51 Contents About ENGYS Vision Overview HELYX GUI HELYX Core Modules PEM Future

52 PEM

53 Feature Summary PEM Features Up to 100x faster than DEM methods Any shape Speed surface facets Any Lagrangian system GPU acceleration real-time performance Meshing integration for fluid solutions

54 Contents About ENGYS Vision Overview HELYX GUI HELYX Core Modules Future

55 Future Continue Building Partnerships Technology leverage Open Source Platform Local Sales/Support Internal: Focus on core technology Core Solvers/Code GUI Accuracy/Speed/Reliability Functionality Client-Server More application supported

56 Disclaimer This document is the property of ENGYS. Its contents, in whole or in part, are supplied in confidence and may not be copied, reproduced, translated, transferred, or reduced to any form, including electronic medium or machine-readable form, or transmitted or publicly performed by any means, electronic or otherwise, without written authorisation issued by ENGYS. Unauthorised distribution or use may give rise to a claim for damages and/or be a criminal offence under the laws of England and Wales. info@engys.com Tel: +44 (0) Fax: +44 (0)