Apresentação R15 Workbench Meshing 1702

8/17/2019 Apresentação R15 Workbench Meshing 1702

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© 2013 ANSYS, Inc. February 17, 20141 ANSYS Confidential & Proprietary Information

15.0 Workbench Meshing


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In

troduction

ANSYS Meshing is a component of ANSYS Workbench

Creates Meshes for different Physics and Solvers

CFD, Mechanical, Electromagnetic

Easy Customization

Methods, Sizes of Entities, Parameterization

Integrates directly with other WB systems


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Re

lease Highlights

Performance

Robustness

Usability


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Performance

Robustness

Usability


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CAD

Geometry

DesignModeler

SpaceClaim

Mechanical/Meshing

Common preprocessing bottlenecks

Targeted improvements to reduce/eliminate thesebottlenecks

Transferring

large models

Shared

TopologyEditing large

models Transferring

large models

Meshing large

assemblies

Swept

Meshing

Shell

Meshing

Large

Meshes


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Improvements in many areas:

– Serial Improvements:

• Size Function:

– especially proximity SFand reduced memory

• Improved Body of Influence (BOI)

• Mesh Methods: – Patch Conforming Tet

– Sweep/Thin Sweep

– MultiZone

–Shell Meshing

– Parallel part by part meshing

– Improved memory limits

Performance Improvements


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Patch Conforming Tet:Speed Improvements



Patch Conforming Tet:Memory Improvements

Note: Quadratic mesh does not

see as much benefits



Sweep:Speed Improvements



Sweep:Memory Improvements



MultiZone:Speed Improvements



MultiZone:Memory Improvements



Shell Meshing:Speed Improvements



Shell MeshingMemory 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 partmeshing appropriately)

• Program controlled will attempt to

use all cores on the machine

provided there is enough RAM



Performance improvements for largeassemblies: Generic Model – Hex Mesh



Performance improvements for largeassemblies: Generic Model – Tet Mesh



Performance improvements for largeassemblies: Generic Model – Hex Mesh



Performance improvements for largeassemblies: Customer Models



Improved memory limits

Increased memory limits in Workbench• R14.5 limit: ~300 M cells (elements)

• R15.0 used to generate 817 M cells

– 6 hours

–Windows 64-bit machine

– 96 GB RAM

– Multi-body part

• Windows only

Generic Aircraft Engine Combustor

Single body, single part

732 M cells (prism + tet)

Generate meshes 2-3x larger

than before, while leveraging

benefits of Workbench


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Performance

Robustness

Usability


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Robustness Improvements

• Mesh failure handling

• Improved PI topology checking

• Improved hex meshing


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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


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

Overlapping faces exist

Mesh editing tools in ICEM

CFD/Fluent Meshing can quickly fix


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

out of date, bodies are indicated in yellow



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PI Topology Checking Control

Why is this failing?

Mesher is often stricter

than it needs to be.

Is this a problem?

The Topology Checking option determines whether the

mesher performs topology checks for Patch Independent


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PI Topology Checking Control (while meshing)

User has 2 options:

1) Improve sizing controls tocapture feature and re-mesh

2) Turn off Topology checking:

Mesher will respect mosttopology, but user shouldvalidate important features arein the named selections.

Min size was too

large originally


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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


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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


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MultiZone: Improved consistency

•

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

• Support for inside out biasing

Line BOI

Solid BOI

SOI


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MultiZone: Improved consistency

Mapped Mesh: Internal Number of Divisions

• Radial Number of Divisions becomesInternal Number of divisions:

– Now supports radial cases and axial cases

– Used for MultiZone and Sweep


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MultiZone: Improved robustness

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


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MultiZone: Improved robustness

•Improved robustness/quality in inflation

• Improved robustness for thin andhigh aspect ratio models

• Improved robustness in imprinting and side

face handling


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MultiZone: Mapped meshing

• Support for circular loop handling:

Circular internal loops on

side faces submapped

With inflation, good

quality mesh is

achieved on circular

internal loops


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Performance

Robustness

Usability


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Usability Improvements

•Support for local min size control

• Reverse edge bias

• Hotkeys

• Node/Element Selections

• Report Generator


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• Local control for curvaturesizing for body, face, andedge sizing controls

Local min size control

The global min size limits curvature everywhere

except for areas where local controls override


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Reverse edge bias

• Option in edge sizing for biasing to reverse edge direction

for selected edges


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• 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


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Node/Element SelectionMesh pick mode Element FilterNode Filter


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Selection Information Window

Selection information

including element id, type,

corresponding body, and

node list

User can control information

d l i f fi d


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Use Named Selections of geometry to findattached nodes and elements

Grow layers of mesh using criterion based selections


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Report Generator

Report generator from Mechanical now also available in

Meshing, and provides a lot of useful information:


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Thank you for your time


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Apresentação R15 Workbench Meshing 1702

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