Multiphysics for Thermal Analysis: A Holistic Approach to Process Optimization

Transcription

1 > Multiphysics for Thermal Analysis: A Holistic Approach to Process Optimization Thomas Kessling, Stefan Hildenbrand, Victor Fässler 5th - 6th July 2007 Renault Technocentre at Guyancourt, France TWT GmbH Information & Engineering Technologies

2 TWT Short Profile Task: Technical-Scientific Transfer Domain: Information & Engineering Technologies Services: > Product Development: Design, Digital Mock-Up, EDM/CAx-Training and Method Development > Simulation: CFD, MBA, FE-Methods for Product Optimisation > Information Technologies: Software Development and Mechatronics > Technical Consulting > Research Staff: 120 Employees Sectors: Automotive and Aerospace Industry, Medical Engineering Locations: Stuttgart, Friedrichshafen, Ioannina 2

3 Process Overview Thermal Analysis Download Pre-Processing Simulation Post-Processing CATProduct BoM (.ass or.plmxml or.csv) Continuous Process Optimisation 3

4 Process Overview Download Pre-Processing Simulation Post-Processing CATProduct BoM (.ass or.plmxml or.csv) Continuous Process Optimisation 4

5 Data Management Interface Creation of common data basis Crash simulation Data provided in CATIA V4/V5 Customer-specific Conversion in application specific output format Thermal simulation Validation of results CFD Customer 5 TWT Customer

6 Motivation and Objectives > Provision of common data-basis for all simulation sections > Central data manager receives/delivers requests by sections > Conversion of requested extent from single part to entire vehicle > Largely automated conversion process > Validation of conversion output and visualisation of checks 6

7 Flow Diagram of Process Parts Database Data-freeze by construction 7 Download via Partlist/Request CATProduct s Metainfo Output format as requested According to respective simulation tool Extracting of meta-information Material data, positioning, phys. properties Pre-meshing of data possible Surfaces, Solids, Tri-/Quad-Meshes Generation of result-partlist For comparison with original request Local copy of s For later re-design

8 Checking of Output Results > Extent of output is determined from run results > Matching of original request and output per run > Validation of logfiles from conversion process > Determination of input data with/without corresponding output files > Visualisation of checks for entire extent > Re-conversion of missing parts 8

9 Process Optimization by TWT > Optimized input of extents/parameters in batch mode Instead of manual conversion of single parts > Automatic run of process/load balancing Instead of manual run/manual allocation of computational resources > Automatic run of checks Plus visualisation of approx. 70 lead engineering groups and to single parts > Saving approx. 98% of original process time 9

10 Process Overview Download Pre-Processing Simulation Post-Processing CATProduct BoM (.ass or.plmxml or.csv) Continuous Process Optimisation 10

11 Pre-Processing > Programming of individual tools: > Boole algorithms for part connection > Mesh cleaning > Property definition > Boundary conditions > Quality certification

12 Process Optimization by TWT Present: > Semi automatic part connection Instead of manual conversion of single parts > Fully automatic tetraeder meshing Seperate Meshes for all materials in one run > Automatic run of checks model certification > Saving approx. 50% of original process time Outlook: > Fully automatic model building 12

13 Process Overview Download Pre-Processing Simulation Post-Processing CATProduct BoM (.ass or.plmxml or.csv) Continuous Process Optimisation 13

14 Multiphysics for Thermal Simulation > Objective: Accurate, reliable temperature prediction for critical components > Combining the strenths of each code > Different computational grids for each simulation Need for coupling and interfacing the solvers 14

15 Partially coupled Simulation Convective heat transfer as boundary condition Permas Conduction Q W T Film, Star-CD MPCCI T W Posrad Convection Interface Radiation 15

16 Fully coupled Simulation Continuous update of wall temperatures during simulation Permas Conduction T W Q W Star-CD T Film, MPCCI T W Posrad Convection Interface Radiation 16

17 Process Overview Download Pre-Processing Simulation Post-Processing CATProduct BoM (.ass or.plmxml or.csv) Continuous Process Optimisation 17

18 Post-Processing Outlook: > Result overview by automatic post-processing > Automatic temperature image creation for hot spots and standard views of each component and its parts > Temperature listing for every part material > Comparison of computed temperatures with critical temperatures stored in database > Result handling in Simulation Manager 18