proceedings of 25th european workshop on thermal and ecls … · 2012-03-09 · esatan thermal...
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Appendix I
ESATAN Thermal Modelling SuiteProduct Developments
Chris Kirtley(ITP Engines UK Ltd, United Kingdom)
25th European Workshop on Thermal and ECLS Software 8–9 November 2011
146 ESATAN Thermal Modelling Suite — Product Developments
Abstract
ESATAN-TMS provides a powerful, integrated thermal modelling environment. Since the release ofESATAN-TMS r3 in January 2011, major developments have been undertaken in the area of importingCAD geometry and interactive geometry creation. New functionality include an automated facility todefine and generate contact conductances between surfaces, the ability to include wavelength dependentthermo-optical properties and a mechanism to perform axisymmetric analysis. This presentation outlinesthe developments going into the next release of the product.
25th European Workshop on Thermal and ECLS Software 8–9 November 2011
ESATAN Thermal Modelling Suite
Product Status
Author: Chris J Kirtley Date: 8th November 2011
25th European Thermal & ECLS Software Workshop ESA/Estec, Noordwijk, the Netherlands
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Introduction
– Provide a complete and effective thermal modelling
environment • Functionality to meet your current & future modelling
requirements
• Provide a high-quality and fully validated product
– Efficient end-to-end integration within a multi-disciplinary engineering environment
– Backing this up with professional customer support services
• Our vision remains unchanged,
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Introduction
r1 • Time & Temperature Dependency
• Time Dependent Steering
• Shell Assignment
• Non-orbital Analysis
• Extension of Picking
• Coordinate Output
• ESATAN Double Precision
• Transient Solver Improvements
• Performance & Scalability
• User-defined Feature Requests
2009 2010 2011
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Introduction
r1 r2 • Support for Groups
• Extension of Nastran Import
• Performance & Scalability
• User-defined Feature Requests
2009 2010 2011
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Introduction
r3
• Improved Import of CAD Geometry
• Combined FE / LP Analysis
• Enhanced Model Tree Component
• New Conjugate Gradient Thermal Solver
• Contour Plotting
• Extension of Post-processing (ThermNV)
• Post-processing ThermNV derived data in Workbench
• User-defined Feature Requests
r2 r1
2009 2010 2011
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Introduction
• Current developments – Improved Geometry Modelling – Performance Enhancement
– Face-to-Face Conduction Support
– Wavelength Dependent Thermo-optical Properties
– Axisymmetric Analysis
– User-defined Feature Requests
• ESATAN-TMS r4 is now available
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Improved Geometry Modelling
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Improved Geometry Modelling
• Aim - Reduce the model creation time • Geometry created in Workbench or imported from CAD • Last year presented developments to CAD import
– Mesh refinement – Shape recognition – De-feature geometry
• Focus on geometry creation process within Workbench
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Improved Geometry Modelling
• Additional construction points to facilitate creation of geometry – Construction points at Shell centres & Face vertices – Concept of literal Points
• No name assigned • Specify coordinate position • Not listed on the model tree • Not associated with a shell • Can be deleted by picking
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Improved Geometry Modelling
• Additional construction points to facilitate creation of geometry – Construction points at Shell centres & Face vertices – Additional Point construction methods
• Point of intersection of 2 lines
• Literal or Named Point • Closest point, line 1 if do not intersect
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Improved Geometry Modelling
• Additional construction points to facilitate creation of geometry – Construction points at Shell centres & Face vertices – Additional Point construction methods
• Point of intersection of 2 lines • Points on a line
• Literal Points • Defined by No. points or positions
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Improved Geometry Modelling
• New shell definition method “Define by Circle” – 3 points to define a circle
• Disc, sphere – Height
• Cylinder, Paraboloid, Cone
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Improved Geometry Modelling
• Shell Transformation – Enhanced user interface
Axis & Vector Move Origin – New transform methods
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Improved Geometry Modelling
• Simplified data entry – Auto-completion of “Define by Direction” fields
Direction
Origin & Length
Origin, Height & Radius
Origin & Radius
Box, Rectangle, Triangle & Triangular_Prism
Disc & Sphere
Cone, Cylinder & Paraboloid
– Auto-highlight field values on tabbing
– Picking of points even when points not displayed
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Improved Geometry Modelling
• Control of displayed shells on Groups, Bulks & Opticals
Multiple Bulks Selected
New Display Options
Undisplay Icon
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Performance Enhancements
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Performance Enhancements
• General performance improvements ≈ Doubling of speed over r3
• Reduction of memory requirements
– Limit on Reporting & Command window buffer • Buffer size user preference (default 10,000)
• Redirect reports to a named file
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Performance Enhancements
• New solution parameters to control of analysis – Limit the REFs via “Ray Total Cutoff” (default 0.005 / 0.5%)
• Percentage of the total energy emitted from a face • VFs/REFs omitted after the radiative run • Reduces the memory usage • Improve the performance of the Analysis Case • Reduced thermal analysis file size • Reduced thermal solution time
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Performance Enhancements
• New solution parameters to control of analysis – Analysis Case parameter “HF Minimum Deviation” – HF assumed constant if deviation < HF Minimum Deviation
timeHF
timeHF
– Default 0.005 / 0.5% – Reduced thermal analysis file size – Reduced thermal solution time – File Optimisation parameters
grouped
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Face-to-Face Conduction Support
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Face-to-Face Conduction Support
• Automatically generate conductances between surfaces in contact – New variable Contact Zones
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Face-to-Face Conduction Support
• Automatically generate conductances between surfaces in contact – New variable Contact Zones
• Define surfaces in contact – Select a Shell side, Face or Group (of Faces or Shell Sides) – Congruent mesh not required
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Face-to-Face Conduction Support
• Automatically generate conductances between surfaces in contact – New variable Contact Zones
• Define contact conductance – Literal or a Property
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Face-to-Face Conduction Support
• Automatically generate conductances between surfaces in contact – New variable Contact Zones
• Ray-trace to determine Faces in contact / associated area – Define sample points (default 10,000) – Define maximum gap (default 0.01m)
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Face-to-Face Conduction Support
• Automatically generate conductances between surfaces in contact – New variable Contact Zones
• Report Contact Zone data – Node pairs & calculated contact area – Total contact area
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Wavelength Dependent Thermo-optical Properties
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Wavelength Dependent Thermo-optical Properties
– Piece-wise Grey Body method – IR spectrum divided into bands – Steady state and transient
analysis supported – Moving or non-moving geometry
supported
• For systems with significantly varying temperatures the “semi-grey body” idealisation no longer sufficient
• Support definition of wavelength dependent optical properties
Wavelength
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Wavelength Dependent Thermo-optical Properties
• Optical data defined using Property Environments
• Run radiative analysis for each waveband
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Wavelength Dependent Thermo-optical Properties
• Run thermal analysis – Define Analysis Case – Wavelength Dependent – Associate Radiative Cases
– Define waveband array – Run analysis
• Post-process thermal results in Workbench
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Axisymmetric Analysis
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Axisymmetric Analysis
• Development to meet customer requirements
– Workbench used to perform axisymmetric analysis
– Model defined within the X-Y plane • Y – Axial direction • X – Radial direction
– Planar shells used to represent the section geometry
– Thermal model generated representing the 3D model
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Axisymmetric Analysis
• Additional boundary conditions supported – Volumetric heat load
• Shell side, Face or Group – Convection to an edge
• Edge defined by a contiguous Group of Thermal Nodes
• First release of functionality – Further GUI support – Input on further requirements
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User-defined Feature Requests
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User-defined Feature Requests
• Focus on addressing user-defined Feature Requests – Ability to set the default overlay
• Model Preferences • Default changed to Colour
Recursive attribute editing on Label Label per Shell side
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User-defined Feature Requests
• Focus on addressing user-defined Feature Requests – Clear button on Command History window
• Clears specified area
– Auto-section of results / time steps on pre- & post-process – Run directly parametric solution from Workbench – Default Analysis File name – Contract Above menu item
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Conclusion
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Conclusion
• ESATAN-TMS r3 extended CAD Import capability
• ESATAN-TMS r4 extends the interactive geometry modelling capability
• Process still requires a clean CAD geometry CADConverter
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Conclusion
• Need the ability to visualise the CAD geometry
• Need the ability to edit the CAD geometry
CADConverter
Henri will talk more about this
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25th European Workshop on Thermal and ECLS Software 8–9 November 2011