ansys15 updates for enhancement in geometry meshing

© 2012 ANSYS, Inc. February 6, 2014 1 ANSYS Confidential & Proprietary Information

Updates: Geometry & Meshing ANSYS R15

Anilkumar Sardesai

Application Engineer


Outline Design Modeler: Feature Based Modeler

• Speed • Reduced expense for Shared Topologies (Generalized Booleans)

• Robustness • Transfer to Meshing improvements, parameter’s handling

• Flexibility • Slice plane, units, tolerance

• Latest Standards – Support for Newest CAD software releases

ANSYS SpaceClaim 2014: Direct Modeler

• Interoperability • Support to maximum cad formats with threaded loads

• Modeling • New repair tools with detailing

Workbench Meshing:

• WB Meshing highlights

• Performance

• Robustness

• Usability

ICEM CFD:

• Enhancement in ICEM with WB add-in

Questions & Answers


CAD Geometry

DesignModeler

SpaceClaim Mechanical/Meshing

Common preprocessing bottlenecks

Targeted improvements to reduce/eliminate these bottlenecks

Transferring

large models

Shared

Topology Editing large

models Transferring

large models

Meshing large

assemblies

Swept

Meshing

Large

Meshes

Multizone/

Hybrid

Meshing


Share Topology now supports instancing for multi-body parts using Automatic or Imprint shared topology methods. Significant total preprocessing time can be saved by propagating mesh specifications to all parts in a pattern

Instancing Support for Multi-Body Parts

All parts of a pattern can share specifications


Meshing Instanced Multibody Parts

• Create pattern in DM

• Share topology to enable conformal meshing

• Ask whole pattern to inherit specifications of first part


Users can now apply a Shared Topology Method to bodies within a multi-body part. This allows users to specify sharing setting for individual bodies that are different from the rest of the part, giving much greater flexibility.

Custom Shared Topology for Bodies

Three bodies, one part

Shared Topology for conformal mesh

Sliding contact surface (no shared topology)

Mapped face mesh specification for cyclic symmetry simulation


Users now have an additional option in the face coloring dropdown list to color entities by their Share Topology type. The predefined list includes automatic, imprints, edge joints, and none.

Face Coloring and Display Legends for Shared Topology Type


Details View of Distance Finder in R14.5

XYZ component distances are computed and displayed in R15.0

Distance Finder Enhancement

XYZ components in the plane of interest

The Distance Finder tool now displays global and local XYZ components


Details view in R15.0

Coordinates File Units

• Users now have the option to specify the unit of data in the Coordinate file for the Point & 3D Curve Features.

Details view in R14.5

User specified unit for Coordinate File


Section Plane

• Was there In Meshing application

• Many recent requests to have it in DM

• User workflows in/out just to view cross sections

• Simple UI – Single/Multiple saveable

planes allowed

– New, Edit (dynamically), Delete

Section Plane R15.0


Units

• Units and Model Size settings

can now be changed via Units Menu or Details View

• Working units can now be changed within a session

• Better control via scripting • Set or get length or angle unit

• Set or get model tolerance

• Set or get Large Model Support setting


Geometry Interfaces R15 Geometry Interface Name Supported CAD Versions

ANSYS Geometry Interface for Creo Parametric Pro/E Wildfire 5(Creo Elements/Pro), Creo

Parametric 1, Creo Parametric 2

ANSYS Geometry Interface for Creo Elements/Direct

Modeling Creo Elements/Direct Modeling 17.0, 18.0,

18.1

ANSYS Geometry Interface for NX NX 7.5, NX 8.0, NX 8.5

CADNEXUS/CAPRI CAE Gateway for CATIA V5 CATIA V5-6R2012, V5-6R2013

ANSYS Geometry Interface for CATIA V5 CATIA V5-6R2013

ANSYS Geometry Interface for CATIA V6 CATIA V6-R2010x-R2013

ANSYS Geometry Interface for Autodesk Inventor 2013, 2014; AutoCAD 2013, 2014

ANSYS Geometry Interface for SolidWorks SolidWorks 2012, 2013

ANSYS Geometry Interface for Solid Edge Solid Edge ST5, ST6

ANSYS Geometry Interface for JT JTOpen 6.4 - 9.5

ANSYS Geometry Interface for ACIS ACIS R24

ANSYS Geometry Interface for Parasolid Parasolid 26.0

ANSYS Geometry Interface for Teamcenter Teamcenter 8.1, 8.3, 9.1


Notes:

• Non-associative

• No parameter access

• Supports JT files that contain Boundary Representation(B-Rep) data

• Tessellation data not read

• JT format not ascii, no easy way to know what file contents are, supports up to level 9.5

JT Reader Support Notes


ANSYS Geometry Interface for Teamcenter


• Units can be assigned in the editor, parameters can be suppressed

• New functions have been added to the Parameter Manager:

Parameter Manager

CEILING – rounds up to the nearest integer FLOOR – rounds down to the nearest integer MIN – minimum value of a set MAX – maximum value of a set ROUND – rounds to the nearest integer


• New hotkeys (F8 and F9) which the user may use to hide selected face(s) or selected body.

• Brings DesignModeler hotkeys into consistency with hotkeys in Mechanical.

DesignModeler Hot Key Additions

Ctrl+ F8: Hide All Other Faces Ctrl+ F9: Hide All Other Bodies F8: Hide/Show Faces F9: Suppress/Hide Part and Body Shift+ F8: Show All Faces Shift+ F9: Show All Bodies


DM Tolerance Setting Option – Default Tolerance Setting

– New option to change settings, which may improve:

• Boolean and regeneration success rates

• Meshing success


SpaceClaim 2014 (Direct modeler)

Inter-Operability • New 3D PDF import/export support

• SolidEdge support (multi-threaded)

• Import from AutoCAD layout space

• Import Creo/NX simplified reps/family table parts

• Multi-threaded Load of assemblies

• Direct mesh/STL-to-OBJ (reverse engineering tools)

• Added File Locking in SC


SpaceClaim 2014 Continued

Modeling • New Blend tool w/ additional blend creation features • New Repair tools: alignment & reduce surface complexity • Parameter/dimension improved integration with Excel • Flatten command for assemblies • Pinned datum's/axes/points that follow geometry

Detailing • Assembly explode option • True semantic GD&T/Dimensions/Annotations • Barcodes • Baffle support in shared topology • Pull/Move pivot operations can be driving parameters


SpaceClaim 2014 Continued

Pin-able Datum's • Planes, Axes and Points can follow placement

references through changes

• Works for both placement and orientation

Standard Holes follow placements

Measurement enhancements: • Improved measurement display

• Can drive Pulled and Moved objects to measured quantities (Vol., Min. Dist., etc.)

• Improved Excel integration with dimension-driven groups


Meshing & ICEM CFD ANSYS R15


General-purpose meshing • Enables Simulation Driven

Product Development – Parametric, Persistent, Highly-

Automated, Flexible, Physics-aware

• CAD-based meshing for moderately-complex geometries

• Strong, automated capabilities for tet/prism, hex, or hybrid tet/prism/hex meshing

• General meshing tool with special features for Mechanical, Fluids, Explicit Dynamics, and Electromagnetics

• Best tool for assemblies of parts w/non-conformal interfaces

Workbench Meshing


Improvements in many areas: – Serial Improvements: • Size Function:

– especially proximity SF and reduced memory

• Improved Body of Influence (BOI)

• Mesh Methods: – Patch Conforming Tet

– Sweep/Thin Sweep

– MultiZone

– Parallel part by part meshing

– Improved memory limits

Performance Improvements


Parallel part by part meshing

Parallel Part meshing

• Simultaneously meshes multiple parts on multiple CPU’s

• Works for all part mesh methods

• For mesh methods that mesh in parallel will utilize cores for both part meshing and body meshing (user should set Number of CPUs for meshing methods and Number of CPUs for part meshing appropriately)

• Program controlled will attempt to use all cores on the machine provided there is enough RAM


Robustness Improvements

• Mesh failure handling

• Improved PI topology checking

• Improved match mesh robustness

• Improved hex meshing


Mesh Failure Handling

Improved failure handling: – Better user indication

• Markers to help find problematic faces

On inspection, use single/multiple

edge display to see holes in mesh



If Meshing fails, user can export mesh and edit in Fluent Meshing or ICEM CFD (File->Export)

Overlapping faces exist

Mesh editing tools in ICEM

CFD/Fluent Meshing can quickly fix


Better user indication: – When mesh sizes are changed, and mesh goes

out of date, bodies are indicated in yellow



PI Topology Checking Control (while meshing)

Why is this failing?

Mesher is often stricter

than it needs to be.

Is this a problem?

Meshing success for Patch Independent (PI) mesh methods requires respecting all topologies that have Named selections, loads, etc. applied.


PI Topology Checking Control (while meshing)

User has 2 options:

1) Improve sizing controls to capture feature and re-mesh

2) Turn off Topology checking:

Mesher will respect most topology, but user should validate important features are in the named selections.

Min size was too

large originally


PI Topology Checking Control (after meshing)

PI Tet mesh methods only have mesh association for topology defined prior to meshing.

1. If a user creates a Named Selection, Load, etc. after meshing, the mesh goes out of date if Topology checking is Yes. Mesh does not necessarily need to be re-generated, but user must generate mesh to ensure associations are correct.

2. If user turns Topology checking to No, Named Selections, Loads, etc. can be applied w/out having to re-check associations. User should check on their own.


Improved match mesh robustness

• Mesher more tolerant – Warning given when geometry is out of tolerance

– Mesher comes off geometry to make mesh periodic


Improved match mesh robustness

• Improved for cyclic and arbitrary match controls

• High side is respected, and low side is adjusted to match

High side faces

are meshed

LCS is not positioned

exactly right

Low side mesh is matched

exactly, but needs to come

off geometry to

accommodate this


Improved hex meshing: MultiZone

MultiZone

• Option to use MultiZone as default Sweep mesh method

• Improved: – Consistency (common controls, etc)

– Robustness

– Mapped meshing

• Support for internal loops

• GAMBIT submapper

– Feature capturing


MultiZone: Use MultiZone for Sweepable bodies

MultiZone w/Automatic method:

• MultiZone is used in place of Sweep for Sweepable bodies

• Program controlled inflation works in 3D


MultiZone: Improved consistency

• Support for Body/Sphere of Influence (BOI/SOI)

• Support for inside out biasing

Line BOI

Solid BOI

SOI


MultiZone: Improved consistency

Mapped Mesh: Internal Number of Divisions

• Radial Number of Divisions becomes Internal Number of divisions: – Now supports radial cases and axial cases

– Used for MultiZone, Sweep, and PC-Tet


MultiZone: Improved robustness

• Improved robustness for swept mesh along varying profiles (blades, etc.)


MultiZone: Improved robustness

• Improved robustness/quality in inflation

• Improved robustness for thin and high aspect ratio models

• Improved robustness in imprinting and side face handling


MultiZone: Preserve boundaries option

MultiZone, by default only captures sharp features:

Default Default when named selections or BCs are defined

Mesh captures respected topology

Mesh captures sharp features,

Ignores cutout features

unless protected

Mesh captures all topology, regardless of

whether it is in a named selection, BC, etc.


Usability Improvements

• Support for local min size control

• Reverse edge bias

• Hotkeys

• Node/Element Selections


• Local control for curvature sizing for body, face, and edge sizing controls

Local min size control

The global min size limits curvature everywhere

except for areas where local controls override


Reverse edge bias

• Option in edge sizing for biasing to reverse edge direction for selected edges


• Ctrl+ A: Select All Objects

• Ctrl+ B: Body Filter Selection

• Ctrl+ E: Edge Filter Selection

• Ctrl+ F: Face Filter Selection

• Ctrl+ P: Point Filter Selection

• F6: Toggle Model Apperance

• F7: Zoom to Fit

• F8: Hide Selected Face

• F9: Hide Selected Object

Hotkeys


Use Named Selections of geometry to find attached nodes and elements

Grow layers of mesh using criterion based selections


ICEM CFD WB Add-in

•Import ICEM CFD projects into Workbench

•Added “Duplicate” option for ICEM CFD system

•Added support for “Use Associativity” geometry cell option

•Added option to create Subsets (instead of Parts) from Named Selections


ICEM CFD WB Add-in

•ICEM CFD now works with RSM and the HPC Parametric Packs

• Part by Part input parameters for Part Mesh Setup

• Prisms created without a script if the Prism Workbench Input Parameter is set.


ICEM CFD WB Add-in

•New Output Parameters • Check Mesh, Premessh Quality & Number of

Blocks • New Workbench Replay Control

• Use the Mesh cell of Meshing application as a source for ICEM CFD to edit the mesh


•Some Beta options were released

– Popular Delaunay “Smooth Mesh” option

– Effective “Enable Smooth Movement” display option

– Downstream transfer to Mechanical APDL

General Enhancements

• Geometry Import options

– Streamlined for better integration with Workbench interfaces

– Accelerated Workbench Readers

– Improved entity recognition when importing from UG files



•Improved “Check Mesh => Periodicity” for easier diagnosis and more

• “Translate and Rotate” transformation for blocking or mesh

• Added support for blocking without geometry

• Added “Aspect Ratio (Fluent)” quality metric


•Documentation is under continuous enhancement

– ICEM CFD Doc and several tutorials are now using the ANSYS Help Viewer.


• Improved Error messages

• Mesh Import improvements

– Nastran

• Output improvements

– Polyflow, CGNS, CFD++, ANSYS Input file,


Question and Answers

Thank You..!!

ansys15 updates for enhancement in geometry meshing

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