Advances in Pre-Processing
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1 Advances in Pre-Processing Laz Foley Confidence by Design Chicago June 14,
2 Outline ANSYS DesignModeler Modeling Improvements ANSYS SpaceClaim Direct Modeler Workbench Integration and Model Preparation ANSYS Meshing Assembly and General Meshing Improvements ANSYS ICEM CFD and ANSYS TGrid 2
3 ANSYS 14.0 Geometry Advances Focus on enhancing your productivity through new features, increased flexibility, efficiency and usability ANSYS DesignModeler Core modeling improvements Application-specific modeling (e.g. IcePak) ANSYS SpaceClaim Direct Modeler Improved Workbench integration Enhanced Model Preparation Interoperability Support for new CAD releases New CAD file readers 3
4 Direct Entity Input for Modeling Operations Direct entity selections are accepted for Extrude, Revolve, Sweep and Skin/Loft operations Named selections and sketches remain supported as valid inputs for greater automation and flexibility 4 Extrude Revolve Sweep
5 More Hot Keys New set of hot keys (short cuts) for frequently repeated operations F3: Apply F4: Cancel F6: Toggle display (shaded+edges/shaded/wireframe) F7: Zoom to Fit Ctrl-A: Select All Ctrl-P: Toggle Point selection filter Ctrl-E: Toggle Edge selection filter Ctrl-F: Toggle Face selection filter Ctrl-B: Toggle Body selection filter Sketching mode only Ctrl-Z: Undo Ctrl-Y: Redo Ctrl-C: Copy Ctrl-X: Cut Ctrl-V: Paste 5
6 Additional Visualization Controls Improved visualization controls for modeling and topology verifications Available through View options or directly from the Toolbar Edge Direction Display Vertex Display 6
7 Additional Usability Enhancements Single/Box selection toggle RMB + LMB combination to easily toggle between the two selection modes Auto Freeze during slicing Slice feature and Slice Material operations are now available for all bodies Both active and frozen Active bodies involved in the slice are changed to frozen state automatically 7 Active Bodies Bodies involved in the slice are changed to a frozen state automatically
8 Improved Named Selection Transfer and Error Handling Improved Named Selection transfer between ANSYS DesignModeler and other ANSYS Workbench applications Improved Error handling Attach failures Share topology failures A new export property inside DesignModeler to control named selection transfer to other workbench applications Improved error handling to provide appropriate error and warnings in case of failures 8
9 Electronics Tool Improvements - 1 Significant improvements in the custom tool to automate model simplification for flow and thermal analysis by IcePak Display of IcePak icons for IcePak bodies in the feature tree Part structure transfer to IcePak Ability to rename multiple bodies in a single step for easy organization 9
10 Electronics Tool Improvements - 2 Support for additional object types Axis aligned annular cylinder Axis aligned conical frustum Axis aligned annular conical frustum Additional object types and extrusion method for more realistic simplification of complex models Support for Polygonal extrusion 10
11 Performance Improvements Example CAD to Meshing/Mechanical Transfer Time (Sec) R14.0 R13.0 % Diff CAD to DM Transfer Time (Sec) DM to Meshing/Mechanical Transfer Time (Sec) R14.0 R13.0 % Diff R14.0 R13.0 % Diff Model Model Model Model Average Improvements CAD to Meshing/Mechanical 16% 11 CAD to DM 32%; DM to Meshing/Mechanical 10%
12 Improved CAD Interoperability Several new readers to provide two types of interfaces for all major CAD systems for improved productivity and flexibility Associative Interfaces Associative, parametric and Bi-directional Readers Native file readers for users without live CAD access Pro/Engineer GAMBIT reader is enhanced to support non ACIS geometry A new DWG Reader for AutoCAD Improved model processing for faster and targeted updates ANSYS DesignModeler 12
13 CAD Interoperability Options New(updated) Geometry Interfaces at R Associative Interfaces (Associative, bidirectional and parametric) Creo Parametric Creo Elements/Pro Creo Elements/Direct Modeling Inventor 2012 SolidWorks 2011 NX 8.0 Solid Edge ST3 (103) Solid Edge ST4 CATIA V5 R21 Teamcenter , 8.3 CAD Readers AutoCAD 2012* Creo Elements/Pro NX 7.5 Inventor 2011 SolidWorks 2011 Catia V5 R20 Catia V4 IGES and STEP Parasolid 24.0 ACIS R21 GAMBIT 2.4 * Requires an AutoCAD installation
14 CAD Configuration Manager Configure to select a Reader or an Associative Interface 14
15 ANSYS SpaceClaim Enhancements Improved Workbench Integration Improved Associativity and data transfer Support for multiple design points Enhanced Model Preparation Tools for Simulation Preview options for Topology Sharing Volume Extract Tool Improvements Additional Selection and Repair Options 15
16 ANSYS SpaceClaim: Improved Integration Improved ANSYS Workbench Integration Improved Associativity and data transfer Support for multiple design points Preview options for Topology Sharing Preview sharing to view topology sharing before transferring the model into Workbench Help detect and fix topology sharing issues before transfer 16
17 ANSYS SpaceClaim: Volume Extract Tool Improvements Progress reporting Options to specify multiple faces as seeds to create more than one volume in a single step Option to preview face selection propagation to detect leaks during volume extraction 17
18 ANSYS SpaceClaim: Improved Selection and Repair Improved Selection and Repair Options More Selection Options Select Parents Select Children ClipView option to isolate and examine selected region Multi-face patch option for fixing missing faces ClipView Without multi-face patch on With multi-face patch on 18
19 ANSYS 14.0 Meshing Advances Focus on enhancing your productivity through new features, increased flexibility, efficiency and usability Rapid Meshing Reduce time spent in CAD and Meshing Improved handling of complicated geometries Extract flow volume during meshing General Improvements in Meshing Process Improved meshing algorithms Improved process and flexibility Improved robustness Improved speed 19
20 Assembly Meshing Assembly meshing is a top-down meshing approach to mesh all parts at 1 time: Use of virtual bodies (material points) to extract flow regions from dirty geometry Support for: Meshing solids from sheet bodies Conformal mesh between parts w/out having multi-body parts Support for overlapping bodies Handling face-edge connectivity Assembly Capping Face Material point 20
21 Assembly Meshing: Characteristics Assembly meshing replaces 13.0 CutCell Meshing at the GUI level Supports both CutCell and Tetrahedral meshes CutCell meshing maintains characteristics from 13.0 High fraction of hex and prismatic cells Supports global size functions, feature capture, tessellation, etc. controls Operates on parts, multi-body parts, etc. with new option to define virtual bodies Patch independent: Eliminates the need for pinch control and VT operations Creates conformal meshes across parts in contact Eliminates the need for multi-body part generation in CAD Ability to create flow volumes from a closed set of bodies (sheet or solid) Eliminates the need for Boolean/Fill operations in CAD 21
22 Assembly Meshing: Flow Volume Extraction 1. Define Coordinate system inside the Fluid Void 2. Insert a Virtual body 3. Assign the proper Coordinate System to the Material Point in the details of the Virtual Body 4. Done #2 #3 22 #1
23 Assembly Meshing: Keep Solid Mesh In the Assembly Meshing panel, you can choose to keep or discard the mesh in all solids Parts can be marked as Fluids/Solids 23
24 Inflation Improvements Speed and Flexibility of inflation: Several improvements to both assembly and part meshing Better quality during stair stepping Better handling of high aspect ratio inflation Improved speed of inflation creation ~30-100% Industrial Example: 68 Million cells, 5 inflation layers Total Mesh Time: R13: 6 hrs 39 mins R14: 3 hrs 38 mins Assembly Meshing Flexibility CutCell: Full support of 2-stage inflation CutCell and inflation in two separate steps Within the working session Tetrahedron: Uses pre-inflation Faster, more layers, and better quality 24
25 Assembly Meshing: Automatic Inflation Also supported for Virtual Bodies Program controlled inflation acts only on Fluid Bodies CutCell + Inflation Tetrahedron + Inflation 25
26 Assembly Meshing: Sharp Angle Tool A special cell cutting algorithm has been developed to properly capture sharp 3D angles Can be used to improve feature capturing in general Insert a Sharp Angle and pick adjacent faces Example: Sharp angles in the Flow volume of drill bit Mesh without Sharp Angle Mesh with Sharp Angle 26
27 Assembly Meshing Leak Handling: Leakage Path Find leaks using material points: Any time you are using material points (for internal flow), and it is leaking to the outside, you can automatically see the leak-path together with the surface mesh There is a small gap between the valve plug and the valve seat 27
28 Assembly Meshing Leak Handling: Contact (Interface) Regions Using Contacts for Assembly meshing: Workbench has extensive capabilities to detect contact (interfaces) between parts. Until now, that contact information has been of little use to FLUENT users, but that has changed at 14.0 Contacts have several purposes for Assembly Meshing: Closing of small gaps using contact sizing Find thin sections Find Contacts Features at contact pairs are preserved Contacts are also used in Fluid Surface picker helper For example, in this image the circled edges would be removed without contact defined since the feature angle is below the default (40 degrees) 28
29 Assembly Meshing Leak Handling: Closing Leaks up to 1/5 of min size Contact sizing: Three simple steps 1. Insert a Face-Face Contact between the entities that are leaking Face/Face or Face/Edge 2. Drag and drop the contact on top of the Mesh Icon Creates a Contact sizing 3. Adjust Contact sizing Should be bigger than the gap Limited to gaps up to 1/5 of min-size 4. Generate Mesh Pick the face of the valve plug (blue) and the edge of the valve seat (red) #3 #1 #2 29
30 Assembly Meshing: Finding Thin Sections Why locate thin sections (3D bodies)? Avoid Leakage The assembly meshing method produces better quality meshes if thin baffles and fins are well resolved By using the Find Thin Sections tool, these can be found in advance and appropriate sizing can be applied 30
31 Assembly Meshing: Fluid Surfaces Creating Fluid Surfaces for Flow Volume meshing Description Pick all faces that make up the wetted surface of the flow volume Applications Mainly used when only flow volume is needed No conjugate heat transfer Advantage Faster Less memory Reduction of leakages Approach Insert Virtual Body Insert Fluid Surface (select faces) 31
32 Assembly Meshing: Fluid Surfaces To manually select all the faces making up all the flow volume is in many assemblies too time consuming To help out with this task, we have added a new picker helper: Extend to Connection! To use this, you need to have proper connections defined Connections are created automatically in WB, so to start with: delete all the old connections! Create New Connections Make sure min-size is properly set! RMB Find Contacts 32
33 Assembly Meshing: Miscellaneous Features Size Function improvements Separate Min size for Curvature and Proximity Less mesh clustering Support for Body of Influence Mesh Unite Fluid or Solid bodies using Mesh Groups Improve quality of the mesh by releasing geometry constraints at interfaces 33
34 Selective Meshing Worksheet For Example: User wants an all hex mesh on quarter piston model Controls order of body meshing: Allows selective body meshing to remain persistent User can record meshing operations, or add steps manually Due to complexity in meshing, user may want to control sequence of meshing steps If recording, steps will be automatically created. 34
35 Selective Meshing Worksheet: Recording Meshing steps relate to Named Selection: When recording, named selections are created for user For example, if recording meshing steps, and user meshes 1 body: 1. Step will be added to Worksheet 2. Named selection will automatically be created 3. Step will not be included in output to solver unless Send to Solver is changed to Yes #2 #3 #1 35
36 Selective Meshing Worksheet: Editing When meshing, if the order in Worksheet needs to be adjusted, this can be done in 1 of several ways: 1. Add, Delete steps 2. Change Contents of Named Selection Note: Add will only append to end of Worksheet, so option #2 is often better. Also, use Active/Inactive options for more flexibility, see following slides 36
37 Virtual Topologies: Interactive editing Tree view is replaced with graphical selections: Select objects and RMB Operate, or use icon palette to: Merge Edges or Faces Split Edges or Faces Create Hard Vertex Shuffle through VTs (order depicts order of creation) Edit VTs to see VT options Delete Virtual Topology Detail View: Global behavior Statistics view added 37
38 Virtual Topologies Example: Blunt body Flexibility: Allows user to get mapped or swept mesh for nonmappable/non-sweepable bodies 38
39 Virtual Topologies Example: Intersecting Pipes Use Virtual Splits for hex meshing 39
40 Hexahedral Meshing Robustness Improvements: MultiZone, Sweep and Thin Sweep Improved case handling for MultiZone MultiZone improvements: Performance improvements Support for match mesh control All Prisms option 40
41 MultiZone: Robustness Improvements Support for: Handling of cylindrical side faces Imprinting Through bodies Through long stretches of connected side faces Through side faces General improvements Support for edge splits 41
42 MultiZone: Mesh Matching Added Support for Mesh Matching: Cyclic/Periodic Symmetry and/or match mesh control 42
43 MultiZone: Performance Improvements Speed Improvements: Better performance for swept blocks Improved multi-body part handling 14:24 12:00 9:36 7:12 4:48 2:24 0:
44 Tetrahedral Meshing Robustness and Quality improvements in tri surface meshing, inflation and tetrahedral meshing Separated Min Size for Curvature and Proximity Added new option for Advancing Front Triangle Surface Meshing 44
45 Connections for Fluent In 14.0, information in the contact folder will be written as mesh interfaces for Fluent If you have contacts/connections in an old database, the user is asked to remove the contact information A new WB option to NOT generate contacts automatically is available 45
46 Connections for Fluent Start Workbench and open Tools Options Go to Either Meshing or Mechanical Unselect Auto Detect Contact on Attach 46
47 ANSYS ICEM CFD 14.0 Update Productivity enhancements through increased robustness, flexibility, and efficiency Over 200 defects and feature requests resolved User interface Selection and Display Enhancements Model tree enhancements Enhanced Subsets Mesh Editing Enhanced Prism editing, refinement, etc. Output Enhanced output to CGNS, ANSYS FLUENT 47
48 ANSYS ICEM CFD 14.0 Update Enhanced Core Meshing Technology Hexa Blocking Improved interaction Enhanced Create, Split, Move, Link, Smooth, Index control, etc. MultiZone Enhanced Robustness, Sweep, Periodicity, etc. 48
49 ANSYS ICEM CFD Update Enhanced Core Meshing Technology Tetra/Prism TGrid Implementation Refactored New Batch Refinement Tool 49
50 TGrid 14.0 Update Driven by Assembly meshing technology exposed in ANSYS Meshing Assembly Meshing features Material points /mesh/cutcell/set/create-material-points Sharp angle and feature capturing /mesh/cutcell/set/set-thin-cut-faces /mesh/cutcell/set/set-thin-cut-edges Leak path, CutCell-to-Tet conversion, etc. Prism speedup (~2x) Defect fixing Wrapper, CutCell, surface meshing, tet meshing, topology handling, prisms, etc. Updated wrapper templates Contact support for latest version, tutorials 50
51 Interactive TGrid in ANSYS Meshing Interactive TGrid through Assembly meshing (Beta) Beta option enabled and TGrid (or Extended) license available The current geometry will be read into TGrid in a faceted format and Size Function, CutCell Objects, Features and Inflation controls will be transferred to the TGrid session In TGrid the faceted geometries can be checked, SF controls modified, CutCell mesh generated, checked and improved For Tetrahedron, necessary commands to convert CutCell to a tetrahedral mesh are listed in the transcript window Scroll back and cut and paste in the commands Session is returned to ANSYS Meshing upon exit 51
52 Summary ANSYS 14.0 Geometry advances greatly improve productivity through new features, increased flexibility, efficiency and usability ANSYS DesignModeler Core modeling improvements Application-specific modeling ANSYS SpaceClaim Direct Modeler Improved Workbench integration Enhanced Model Preparation Interoperability Support for new CAD releases New CAD file readers 52
53 Summary ANSYS 14.0 Meshing advances greatly improve productivity through new features, increased flexibility, efficiency and usability Rapid Meshing Reduce time spent in CAD and Meshing Improved handling of complicated geometries Extract flow volume during meshing General Improvements in Meshing Process Improved meshing algorithms Improved process and flexibility Improved robustness Improved speed 53
54 Advances in Pre-Processing 54
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