RadTherm – Advanced Thermal Modeling& Coupling with HWPAAltair EATC 2013, Turin, ItalyAntti JussilaYour Partner in Thermal...
2 Total Thermal SolutionsAgenda ThermoAnalytics RadTherm Introduction Fast Transient Thermal Solver Coupling with HWPA...
3 Total Thermal Solutions3 Total Thermal SolutionsHeadquarters in UP Michigan• Service & Training Office in Detroit• Distr...
4 Total Thermal Solutions4Total Thermal SolutionsRadTherm Thermal Simulation Software CAE Software forVirtual ProductDeve...
5 Total Thermal SolutionsAmbient AirSolarLoadingConduction ALONG & THROUGHElementsComplete Thermal Analysis Environmental...
6 Total Thermal SolutionsNatural Environment Modeling
7 Total Thermal Solutions7 Total Thermal SolutionsCAE Thermal Simulation System Tools Concept 1D Models Long Transients...
8 Total Thermal Solutions8 Total Thermal SolutionsHuman Thermal Model Fiala, Berkeley, TAIphysiology 20 body segments,ea...
9 Total Thermal Solutions9 Total Thermal SolutionsBattery Electrical & Thermal Scenarios0.010.020.030.040.050.060.070.080....
10 Total Thermal SolutionsCoupling with HyperWorks Hypermesh RADIOSS AcuSolve
11 Total Thermal SolutionsHyperMesh Geometry Export Complex surface descriptions of component systemscan be imported usin...
12 Total Thermal SolutionsCoupling with RADIOSS RadTherm Thermal Model (temperatures) RADIOSS FEA/Stress Model
13 Total Thermal Solutions13 13Transient Brake Thermal Analysis Goal: Brake Assembly and Component ThermalPerformance Co...
14 Total Thermal SolutionsRadTherm Thermal model 20 min Transient brake model 10 stops / vehicle velocity 0 to 96 km/hr...
15 Total Thermal SolutionsRadioss Coupled Simulation Comprehensive modeling approach Heat absorbed by the rotor during t...
16 Total Thermal SolutionsRadTherm - AcuSolve Coupling RadTherm calculates surface to surface radiation,conduction, and c...
17 Total Thermal SolutionsRadTherm - AcuSolve Coupling AcuSolve CFD model – 30 minute cool-down scenario Initial interio...
18 Total Thermal SolutionsCFD Coupling:Transient RadTherm + Multiple Steady-State CFDCFDSteady-state repr. t=0RadThermStea...
19 Total Thermal SolutionsThank You! Antti Jussila Email: aj@thermoanalytics.com Tel: 906-482-9560 ext. 107 Please, vi...
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RadTherm – Advanced Thermal Modeling & Coupling with HWPA

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RadTherm – Advanced Thermal Modeling & Coupling with HWPA

  1. 1. RadTherm – Advanced Thermal Modeling& Coupling with HWPAAltair EATC 2013, Turin, ItalyAntti JussilaYour Partner in ThermalManagement Solutions
  2. 2. 2 Total Thermal SolutionsAgenda ThermoAnalytics RadTherm Introduction Fast Transient Thermal Solver Coupling with HWPA Hypermesh, RADIOSS, AcuSolve
  3. 3. 3 Total Thermal Solutions3 Total Thermal SolutionsHeadquarters in UP Michigan• Service & Training Office in Detroit• Distributors Worldwide• European OfficeThermoAnalytics
  4. 4. 4 Total Thermal Solutions4Total Thermal SolutionsRadTherm Thermal Simulation Software CAE Software forVirtual ProductDevelopment Thermal Analysis/Heat Protection ofComponents,Materials, and FullVehicle. Integration of testingand simulation
  5. 5. 5 Total Thermal SolutionsAmbient AirSolarLoadingConduction ALONG & THROUGHElementsComplete Thermal Analysis Environmental Effects Solar: Direct, Diffuse & Reflected Global Position and Weather Sky and Wind Models Radiation Multi-bounce Surface-to-Surface Thermal and Solar Radiation Automatic View Factors Convection Automatic Convection Library 1D Fluid Flow (Advection) Import CFD Results Conduction Automatic Vertical and LateralConduction Different Part Types handle specialcases (e.g. Multi-layer, Transparent) Solid & Shell Element SupportRadiationExchangewith Sky
  6. 6. 6 Total Thermal SolutionsNatural Environment Modeling
  7. 7. 7 Total Thermal Solutions7 Total Thermal SolutionsCAE Thermal Simulation System Tools Concept 1D Models Long Transients Solved Quickly RadTherm Simple 2D or Detailed 3DGeometry Radiation, Conduction, &Convection Long Transient CFD Highly Detailed 3D Geometry Steady State or Short TransientOptimizationGeometryDetailSimulated TimeSystemToolsCFD RadTherm
  8. 8. 8 Total Thermal Solutions8 Total Thermal SolutionsHuman Thermal Model Fiala, Berkeley, TAIphysiology 20 body segments,each with three sectorsand four layers. Thermal Model Metabolic Heating Shivering Respiration Sweating Peripheral Vasomotion Solves Bio-HeatTransfer Equation Predicts Skin Temp,Interior Tissue Temps,Blood Pool Temp,Core Temp
  9. 9. 9 Total Thermal Solutions9 Total Thermal SolutionsBattery Electrical & Thermal Scenarios0.010.020.030.040.050.060.070.080.090.00 60 120 180 240 300 360 420 480 540 600Speed(mph)Time (seconds)US 06 Drive Cycle Goal: Thermal & Electrical Modelingof Battery Cells & PacksSAE Paper #2012-01-0117 &2012-01-0332 Scope: Transient drive cycle with thermal &electrical simulation Transient hot soak & pre-heating simulationin natural environments Evaluate battery packaging performance(insulation, cooling, etc) RadTherm standalone OR coupled withCFD Benefits: Simulate Packaging & design options underreal transient vehicle operation Quantified relative benefits of variousindividual changes (insulation, materials,etc.) and combined effects Determine Cooling & Packaging, HeatingCapability Combine with Total Energy Use in a vehiclee.g. HVAC study
  10. 10. 10 Total Thermal SolutionsCoupling with HyperWorks Hypermesh RADIOSS AcuSolve
  11. 11. 11 Total Thermal SolutionsHyperMesh Geometry Export Complex surface descriptions of component systemscan be imported using Nastran or Patran file types Triangular and quadrilateral elements – shell conduction Hexahedral, prism, tetrahedral and pyramid elements – solidconduction HyperMesh generated mesh export Generate shell and/or solid mesh from starting geometry Use “Export Solver Deck” option Select File Type – Nastran Save file to be imported to RadTherm
  12. 12. 12 Total Thermal SolutionsCoupling with RADIOSS RadTherm Thermal Model (temperatures) RADIOSS FEA/Stress Model
  13. 13. 13 Total Thermal Solutions13 13Transient Brake Thermal Analysis Goal: Brake Assembly and Component ThermalPerformance Common Scope: Brake thermal performance 3D conduction, radiation, convection Material sensitivity study Transient drive cycle and stop condition Fluid flow library or coupled with CFD Benefits: Understand design performance Brake fluid line thermal analysis Identify & eliminate problems before prototypes Develop thermal verification processthat works with testing process
  14. 14. 14 Total Thermal SolutionsRadTherm Thermal model 20 min Transient brake model 10 stops / vehicle velocity 0 to 96 km/hr The brake converts the kinetic energy of a vehicle into heat generatedby friction between the pads and the disc rotor Extreme rotor heating scenario commonly used in testing The thermal model is coupled with a CFD model to capture theconvection explicitly due to the flow complexity of a multiple stopscenario Brake geometry Rotor, pads, caliper Heat applied to pad surface 276,000 total elements (solid conduction)2nd Braking event10th Braking eventCool-off while movingSimulation Start
  15. 15. 15 Total Thermal SolutionsRadioss Coupled Simulation Comprehensive modeling approach Heat absorbed by the rotor during the high multiple stop scenarios can cause thermalcracking Significant thermal stresses by the temperature variation within the assembly It is important to be able to capture the physics of this complex problem RadTherm used to determine the temperature distribution of the disc brake Radioss used to analyze the Von-Mises stress distribution using the importedtemperatures Coupling Approach RadTherm exports geometry with mapped temperature results in Nastran format The geometry with temperature boundary conditions is imported to solve a bulkRadioss case Temperature data is used as a load collector which is added to the subcase Von-Misses stresses are calculated based on the temperature distributionInboard Surface Outboard Surface
  16. 16. 16 Total Thermal SolutionsRadTherm - AcuSolve Coupling RadTherm calculates surface to surface radiation,conduction, and convection to the surfaces CFD calculates flow characteristics and the heattransfer to the air Calculated values are passed between each codeRadTherm CFDHTC & TfluidTwall
  17. 17. 17 Total Thermal SolutionsRadTherm - AcuSolve Coupling AcuSolve CFD model – 30 minute cool-down scenario Initial interior temperature is set to 55°C A/C discharge temperature profile is used at inlet Air entering the cabin through 10 ducts Patran format is used for data exchange Ntl file is written containing H coefficient and fluid temperature data One or multiple time step result outputs can be appended through CFD managerin RadTherm Imported data is used as boundary conditions RadTherm Human Thermal module Human Thermal Comfort model used to predict occupant comfort based onenvironmental factorsConvection Coefficient, W/m^2-K
  18. 18. 18 Total Thermal SolutionsCFD Coupling:Transient RadTherm + Multiple Steady-State CFDCFDSteady-state repr. t=0RadThermSteady-state at t=0CFDSteady-state repr. t=40 1 2 3 4 5 6 7 8 9TimeCFDSteady-state repr. t=9RadTherm Initial Thermal Model (estimated convection)RadThermTransient from t=0 to t=4RadThermTransient from t=0 to t=9
  19. 19. 19 Total Thermal SolutionsThank You! Antti Jussila Email: aj@thermoanalytics.com Tel: 906-482-9560 ext. 107 Please, visit our booth!

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