130 geometry and meshing update 10-27-10

© 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary© 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary

ANSYS R13 Update:

Geometry and Meshing

© 2010 ANSYS, Inc. All rights reserved. 2 ANSYS, Inc. Proprietary

Simulation-focused

Specialized tools for engineering

simulation

Physics-aware meshing methods

Workbench-integrated

Seamlessly integrated into

engineering workflows

Automated update

CAD-neutral

Works with all major CAD

systems and file standards

CAD interfaces and file readers

Highly automated

Parametric and persistent

Advanced meshing methods

which automatically capture detail

Feature Rich

Connected to CAD parameters

and attributes

DesignModeler, SpaceClaim

Extensive meshing methods and

controls

Flexible

History-based and direct modeling

Automatic to hand-crafted mesh

WB Meshing and Extended

Meshing tools

ANSYS Geometry and Meshing

Advantages


ANSYS 13.0

Geometry and Meshing

• Feature release driven by customer requests

• Focused on providing value for:

– More automated and flexible CFD

modeling/meshing process

– More automated and flexible Beams & Shells

modeling/meshing process

– More robust hex modeling/meshing

– Improved performance


ANSYS Geometry

- 13.0 Update

Shyam KishorAnsys Inc.


13.0 Geometry Enhancements

• DesignModeler Improvements

– Beam and Shell Modeling

– Model Preparation Tools

– Usability and Performance

– Analysis Specific Tools

• SpaceClaim Integration

• Geometry Interface Improvements

– New CAD Readers

– Support for new CAD releases

– Geometry Interface Performance


DesignModeler

Improvements


Automatic Surface Extension

• Improved shell modeling:

– Extension groups are

identified based on

user specified gap

– Initial value for the

gap is prefilled

– Visual feedback for

selecting gap

– View and edit options

similar to repair tools


Joints and Mid-Surface

Improvements

• Improved joint handling

– Joint feature now allows selection of both surface and lines

– Easy to form shared topology between line and surface bodies

• Improved Mid-Surfacing

– Surface thickness can be assigned at the body level or at the face level

– Thickness assignment for multiple faces in a single step


Visualization Tool to Display

Connectivity

• Edge color based on number of faces sharedFree – 0 face - Blue

Single – 1 face – Red

Double – 2 faces – Black

Triple – 3 faces – Pink

Multiple – 4 faces – Yellow

• Color choices can be customized

• Use Share topology to see MultiBody Part connections


Easy Visualization of Edge

Connectivity

• Thickness control for

specific edge types

• View options to control

display of specific types

Thick Multiple

Display only Single edges


Improved Selection

• Both sides

highlighting during

selection

– Easy to view selection

in complex models

Single Side Highlighted Both Sides Highlighted


Face Split by Points and Edges

• Easy and flexible options

for geometry

decompositions

• Multiple splits in a single

stepFace Splits by Points and

Edges


Edge Split by Locations

• Split locations can be

specified by mouse click

• Edge direction display is

available for split by

fraction method

• Multiple locations on one

or more edges are

supported

• Split locations can be

modified after the split, by

dragging the split points

Edge Split by Locations


Additional Decomposition Tools

Slice a solid by selecting edge loops Splitting a face by screen locations


Face Connect

• Ensures shared topology

among faces within user

specified tolerance

– Support for partial

overlap

Connect Faces


NS Propagation for Improved

Persistence

• Yes – Selection

propagates to

the resultant

entity

• No – The

selection is

destroyed by the

operation

Original Selection

No

Yes

Yes

Yes

No

No

Original Selection


Instancing Support in DM

• Instancing support at

the part level

– Instances imported

from external CAD

– Instances can be

defined in DM

• Benefits

– Improved performance

– Identical mesh on

similar parts


DM Electronics

• Custom tools to

automate model

preparation for

Icepack

– Four levels of

simplification

supported

– Ability to specify

Icepack

primitives


SpaceClaim Direct

Modeler


ANSYS SpaceClaim Direct Modeler

SCDM Compliments DesignModeler

SCDM: Direct Modeling

DM: Feature Based Modeling


Improved Integration with WB

• Data-integrated with Workbench

– SC launched directly from the

project schematic

– Geometry cell now offers two

choices for editing


Geometry Interface

Improvements


Supported CAD Versions at 13.0

• Windows (Associative Interfaces)

– Pro/Engineer Wildfire 3, Wildfire 4 and WF 5

– Autodesk Inventor 2010, 2011

– CATIA V5 R18, R19, R20

– SolidWorks 2009 and 2010

– Solid Edge ST1 and Solid Edge ST2

– UG NX 6, NX 7, NX 7.5

– CoCreate Modeling 2008 and CoCreate Modeling 17

– Teamcenter Engineering 2005, 2007, 2008 with UG NX 5 and UG NX 6

• Windows (Readers)

– CATIA V5 R18, R19, R20

– CATIA V4

– IGES, STEP, ACIS, Parasolid

– Pro/Engineer WF 3, WF 4 and WF 5

– JT Open

• LINUX

– Pro/Engineer WF3

– UG NX 6 and NX 7.5

– IGES, STEP, ACIS, Parasolid


Gambit Reader for Workbench

• Legacy model support for

GAMBIT databases

– Reads Real (ACIS) geometry

from a Gambit database

– Does not include reading

meshing information

– Edit the geometry in DM

– Mesh the geometry in ANSYS

Meshing


Faster and Targeted Update

• Model state is compared to

identify changes

• Only changed bodies and

parts are refreshed

• Meshing update is required

only for the changed bodies

• Significant reduction in time

for updating the mesh after

modifying the model


ANSYS Meshing

- 13.0 Update

Ben KlinkhammerAnsys Inc.

Erling EklundAnsys France.


ANSYS 13.0 Meshing Advances

13

.0 M

es

hin

g D

eve

lop

men

t

Meshing Framework Improvements

►Direct meshing

►Selective body updates

►Parallel meshing (SMP)

►Improved memory utilization

►Parameter handling

►Improved Virtual Topologies

►Mesh-based Connections

►Improved Named Selections

►Improved speed

Mesh Controls

►Improved inflation controls

►Improved diagnostics tools

►Improved mapped meshing

►Improved defeaturing controls

Mesh Methods

►Improvements in Shell meshing

►Improvements in Hex meshing

►Cartesian meshing

►Swept/MultiZone meshing

►Improvements in Tet meshing

►Extended meshing:

►Interactive meshing

►Interactive blocking


Direct Meshing


Direct Meshing:

• Direct Meshing :

– Bodies can be meshed individually (user has

sequence control)

– Mesh matching across bodies in Multibody-Parts

– Automated meshing can be used at any time to

finish rest of meshing

• Add local control where you want it while keeping the

automation

– When controls are added, only affected body

meshes go out of date

– More extensive mesh method interoperability


Direct Meshing: Local Meshing

• Individual bodies can be meshed (no need for

suppression as in 12.1)

• Subsequent bodies use the attached face mesh

Direct Meshing allows for more combinations of how to handle the

common interface between bodies


Direct Meshing: Local Remeshing

• Automated meshing:

– Mesh methods and order

defined automatically

– Good starting mesh

• Direct meshing:

– On inspection, would like

more mesh in some spots:

Add method, inflation or

sizing control and upon

Generate Mesh, only this

body (and any affected

bodies) are re-meshed


Direct Meshing:

Selective body updating

• Similarly if only part of the geometry changes:

– Only affected bodies need

to be updated/remeshed

– Significant time savings

on model change

Face Delete in DM

Geometry Refresh –only 1 body is out of date

Generate mesh –only 1 body is meshed


Direct Meshing:

State Management

• State management: The part/body tree will

indicate which bodies need to be remeshed:

State icons indicate status of bodies.

Body is meshed

Body is not meshed

When mesh controls are added you

will notice that the state changes,

even though the mesh remains

visible.

Body meshes can be

generated or cleared at

body level from the tree

You can also pick the body to

be meshed from the screen


Direct Meshing:

Ordered Meshing

• Automated meshing

Layer of tet

mesh required

as topology

changes

• Direct meshing

With Direct Meshing:

Mesh thin sweep first,

then mesh rest of model with

Automated meshing

Direct meshing complements the

automated meshingThin Sweep Mesh Method can handle this, but the

order the mesh is generated in is critical


Direct Meshing:

Method interoperability

• Method interoperability between:

– Volume meshing:• Patch Conforming Tet

• Patch Independent Tet*

• Sweep

• Thin Sweep

• MultiZone*

• Hex dominant

– Shell meshing:• Default

• Uniform*

* New in 13.0


Shell Modeling

Improvements


Shell modeling improvements

• Seam welding

– Edge/Mesh connectivity display

– Mesh connections

• Edge/Face pinch controls

Displays result from mesh

connections


Connectivity repair tools

• DM: Automatic extensions

• Mechanical/Meshing: Pinch controls

Quickly connect sheet models

On closer inspectionCleanup of geometry

can be manual, due

to tolerances.

Use pinch controls to

quickly fine tune

models


Edge splits to guide meshing

• VT edge splits

available to help

guide meshing:

Edge splits introduced to

constrain the mapped mesh

Difficult to get a good mesh

with complex wavy curves

Mesh is improved

Edge splits can be further

moved interactively


Improved default surface mesh

• Default surface mesh improvements:

– advanced size functions to improve

mesh transitions and orthogonality

12.1 Defaults

13.0 Defaults


Large Scale

Meshing

Improvements


Large Scale Meshing:

• Better memory management

– Significant improvement for

Patch Conforming tetra

• Speed improvements:

– Surface meshing

– Tet meshing

– Hex meshing

– General (I/O, etc)

• Parallel meshing (SMP)

– Patch independent

– Post inflation

– MultiZone

– Uniform Quad/Tri 30

32

34

36

38

40

1 2 3 4

Performance vs. # processors for patch independent tet

Time to mesh (min)


CutCell

Cartesian Meshing


CutCell Meshing Overview

• Suitable for a large range of CFD applications

– Large fraction of hex cells

– Usually 2-4 times fewer cells compared to tet mesh

• Cartesian based meshing technique

– Creates Polyhedral cells for FLUENT solver

• Similar to patch independent approach

– Automatic edge de-featuring

• Driven by advanced size function

• Supports all pre-inflation algorithms


ANSYS Meshing R13

CutCell Meshing GUI

• Current Controls

– Physics/Solver CFD/Fluent

– Advanced Size function

• Edge proximity accessible

• Min-size is critical

• Max size is auto-adjusted

– 3D Inflation controls

• Scoped inflation is recommended

• CutCellMeshing (CutCell) controls

– Feature Capture

• Program Controlled = 40 degrees

• Feature Angle:– Angle = 0 – All CAD features

– Tessellation (faceting) refinement

• Program Controlled = 10% of Min size

– Using New Orthogonal Quality


CutCell Meshing Examples

Inflation

Baffles

Multi-body Parts


CutCell Meshing Fluent Project


Extended Meshing


Extended Meshing

• New add-on to ANSYS Meshing to provide

Extended Meshing functionality

– Will take standard bundle (or ANSYS Meshing) + add-on

key

– Will only take the add-on key when performing extended

meshing operations:

• ANSYS Extended Meshing enables:

– Running ICEM CFD or TGrid stand-alone

– Running ICEM CFD or TGrid from the ANSYS Meshing

application using:• Interactive/Batch scripting options for “Write ICEM CFD Files”

• Interactive TGrid as part of CutCell meshing (beta)

Meshing

Extended Meshing


Extended Meshing:

ICEM CFD Interactive

• Options under

MultiZone Method

Yes: Writes ICEM CFD Files for use

in ICEM CFD

Interactive: Runs interactive

ICEM CFD

Batch: Runs ICEM CFD in Batch

Using ICEM CFD Interactive w/replay control, user can block

out a mesh and commit it back to Meshing

Change model parameters, and run ICEM CFD in

batch to update parameter change


ANSYS Meshing at R13

Interactive TGrid

• Interactive TGrid through CutCellMeshing (using Beta option)

– The current geometry will be read into TGrid in a faceted format and all

CutCell, Size Function and Inflation controls (except Generate Mesh) will

be transferred to the TGrid Session

– In TGrid the faceted geometries can be checked, SF controls modified,

CutCell mesh generated, checked and improved

– You can also add Tgrid’s refinement regions

– Issue (exit-tgrid) in TGrid to return the mesh to ANSYS Meshing or just

continue in TGrid


Other ANSYS 13.0 Meshing Advances

13

.0 M

es

hin

g D

eve

lop

men

t

►Parameters in Meshing

►Tied to parameter manager

►Support for all relevant

controls

►Improved inflation controls

►First Aspect ratio

►Last Aspect ratio

►Less Stair stepping

►Improved Named Selections

►Improved inflation options

►Multiple selections

►Better defeaturing controls

►Global/local controls

►Hole removal options

►Better MultiZone meshing

►Improved Auto-Source selection

►Improved source imprinting

►Memory/Speed improvements

►MultiZone inflation

►Program Controlled

►Smooth transition

►Improved Patch Independent

Tet meshing

►Patch Conforming interior mesh

►Hard Size Control

►Improved mapped meshing

►Show Mappable Faces


ANSYS TGrid 13.0

Erling EklundAnsys France


ANSYS TGrid 13.0

TG

rid

13

.0 O

verv

iew

Overview

►Advanced CFD meshing tool

►Source of core CFD meshing

technology in ANSYS Meshing

► Used mainly in

►Automotive/Aerospace industries

TGrid part of release 13.0

►Release with ANSYS products

►Included in ANSYS installation

►New license structure

Key Themes

►Strengthen TGrid for existing users

►Enhance technology shared with

Workbench

High Fidelity

meshing

Dirty Geometry

meshing


ANSYS TGrid 13.0 Technology

TG

rid

13

.0 N

ew

Dev

elo

pm

en

t

CutCell Meshing

►95% Shared with ANSYS Meshing (AM)

►Geometry and mesh manipulation

►Extended Size Function Control

►Local size function

►Meshed Size Function

►BOI support

Prisms (pre-inflation)

►Reduced stair stepping (AM)

►Improved Baffle handling

►New Post smoothing

►Normals by material point

Process improvements

►Domain definition by material point

►Improved topology checks

CutCell using

pre-inflation


TGrid 13 HexCore and Wrapper

TG

rid

13

.0 N

ew

Deve

lop

men

t New HexCore Features

►Cartesian Core extending to

►Planar Boundaries

►Specific Coordinates

►Speed improvements

►Cavity remeshing

Wrapper improvements

►Improved feature capturing

►Extended hole/leak management

►Underhood related improvements

►Easier MRF zone definition

►Hole patching with CFD mesh

Check out the Underhood template


ANSYS ICEM CFD

13.0 Improvements

Simon PereiraAnsys Inc.


Mesh from

►Dirty CAD, Third Party Geometry, etc.

►Faceted Data, Scan Data, STL

►Combinations of CAD, Facets & Mesh

ICE

M C

FD

13

.0 O

verv

iew

Efficiently Mesh large/complex models

►Greater than 20 million cells

►Extended mesh controls

Hexa mesh

►Structured or Unstructured

►Advanced blocking control

Extended mesh diagnostics

Advanced Interactive Mesh Editing

Output to a wide variety of solver formats

►CFD, FEA, neutral formats

Structured

Hexa mesh

>250

Million

Cells

Interactive

Mesh

Editing

ANSYS ICEM CFD Extends ANSYS

Meshing Capabilities With Power To:

Flexible geometry tools and

robust patch independence

• High powered meshing methods with low overhead

• Extensive Meshing controls to distribute mesh

• Automatic O-grid tool

• Advantages of topology layer

• Flexible, Nodes follow geometry features


ANSYS ICEM CFD 13.0

ICE

M C

FD

13

.0 F

oc

us

13.0 ICEM CFD Development Themes

►Enhance ANSYS ICEM CFD

►customer request driven

►Enhance technology shared with

ANSYS Meshing

►Tetra/Prism, Quad & MultiZone

ANSYS ICEM CFD Development

►Bug fixing

►Hexa improvements

►Smoothing, SMP

►Mesh diagnostic/editing advances

►Process and interface streamlining

►Output format updates

Over 200 defects & feature requests resolved for 13.0

Elliptical Smoothing


Element TypeSpeedup factor between

12.1 and 13.0

HEXA_8 ~30 times

QUAD_4 ~20 times

TETRA_4 ~10 to 20 times

PENTA_6 ~20 times

TRI_3 ~3 times

Normalized Display Test Results

Hybrid Mesh (CFD)

Improvement highlights

ICE

M C

FD

13

.0 H

igh

lig

hts

General

•Overall GUI speedup

•Multi-Threaded (SMP) Meshing methods

and smoothing

•Process improvements

•Scripting enhancements

•New “ANSYS Extended Meshing” product

Hexa/MultiZone•Smoothing enhancements

•Selection Tool Enhancements

•Improved Edge Param and Settings behavior

•Improved Block type conversion

•Improved Sweep

•Free-block baffles

Mesh Editing•Improved hybrid mesh merging, split prism, etc.

•New & improved diagnostics

•Defect reductions

Etc… Contact your Staff member for details

Merge MeshesOrthogonalWorkbench

New Diagnostics

Orthogonal Smoothing


Conclusions


Intr

od

uc

ing

AN

SY

S 1

3.0

Simulation-focused

Shell and beam improvements

Mesh connections

Improved physics preferences

Workbench-integrated

Data-integrated SpaceClaim

More parametric control of

meshing

CAD-neutral

New readers

Updated CAD system support

SpaceClaim

Highly automated

Improved performance

Improved memory usage

Smart updates

Feature Rich

CutCell Mesh method

Topology diagnostics

Extensive hex modeling/meshing

Flexible

Direct Meshing

Extended Meshing

CAD and Mesh defeaturing tools

ANSYS Geometry and Meshing

Advances


Thank you for your

time, any questions?

130 geometry and meshing update 10-27-10

Documents