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ANSA and ETA v14.0 powerful pre- and post-processing for advanced CFD simulations January 2013 1

ANSA and ETA v14.0 powerful

pre- and post-processing for advanced CFD simulations

January 2013

BETA CAE Systems S.A.

Kato Scholari, Thessaloniki,

GR- 57500 Epanomi, Greece

Tel :+30-392-021420Fax :+30-392-021417

Email : [email protected]

URL : http://www.beta-cae.gr

geometry

mesh

morph

results


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ANSA pre-processor specifications

Supported platforms:

- Linux

- Windows XP / Vista / 7

- MacOS

By permission of

Wirth Research Ltd

32 & 64 bit code for unlimited memory usage

Double precisionfor high accuracy

Parallel processing on multi core hardware for maximum speed


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Easy model visualization and manipulation using focusing and cutting plane functions

Powerful handling of large CFD models

High Lift Prediction Workshop model


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By permission of Wirth Research Ltd

Input/Output

Native CAD formats:

CATIA V4 & V5

Unigraphics NX

Pro/ENGINEERJT

SolidWorks

Inventor

Parasolid

Neutral CAD formats:

IGES

VDA-FS

STEP

CFD formats:

Fluent

Star-CD and CCM+

OpenFOAMCFD++

CFX5

CGNS

SC/Tetra

UH-3D

Other mesh formats

PATRAN

STL

VRML

and more..

Direct Interfaces with other CAE codesRADTHERM

NASTRAN

ABAQUS

ANSYS

LS-DYNA

PAMCRASH

and more..


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Geometry handling

CAD feel, easy-to-use functions for creation and manipulation of geometrical entities (points,

curves, surfaces)


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Geometry handling: Advanced automatic and manual clean up tools


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Geometry handling: De-featuring and watertight model preparation

Raw CAD data De-featured and

watertight model


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Geometry handling: identification and isolation tools for:

Intersections Contacts/Proximities

Inner passagesOuter skin Baffles

Emboss logos


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Powerful tools for management and connection of CAD geometry and existing FE-mesh

Combining geometry and FE-model mesh


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Intersecting geometry and FE-model mesh (mesh not associated with geometry)

Boolean operations between combinations of geometry and FE-model mesh


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Speed-up model preparation using automatic identification of similar geometry & replacement with

linked geometry

Geometry handling: Linked geometry


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Multiple algorithms for tria, quad or mixed-type shell mesh

Surface meshing


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Automatic Macro Area merging for high quality surface mesh

Surface meshing


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Fully automatic Curvature Dependant surface meshing

with user controlled growth rate, min & max

element size and mesh feature angle

By permission of

Chalmers Technical

University

Surface meshing for CFD


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Size Boxes of arbitrary shape for local surface mesh control

Surface meshing: Size Boxes


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Combined CFD and anisotropic meshing for aerospace applications


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Surface meshing: STL algorithm

For solvers that do not require volume mesh

as input, like Powerflow


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Surface meshing proximity detection

Proximity detection in shell mesh and auto-refinement


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Reconstruction of existing FE-model mesh for element type modification, quality

improvement, refinement, or coarsening

Surface meshing - Reconstruction

Automaticfeature line detection

Remeshing specified

element type

Refining Coarsening


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Reconstruction of bad quality STL mesh respecting local size and curvature

Surface meshing - Reconstruction


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Automatic detection and gap closure


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Variable length Wrapping, capturing local curvature and model feature lines

Surface Wrapping

Imported STL

or uncleangeometry

wrapping


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Variable length Wrapping, capturing local curvature, model feature lines

with proximity refinement and contact prevention

Input STL dataTreatment (hole and gap closure)

Surface Wrapping

Surface Wrapping


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Surface Wrapping: proximity refinement options

Different part proximity

Same part proximityOriginal STL

Without self-proximity With self-proximity

Ability to specify proximity refinement settings to avoid fused areas between different

or same parts


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Surface Wrapping: leak detection tools

Identification of multiple leak paths for multiple user specified source points

Leak 1

Leak 2

Leak 3


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Mesh integrity checks (locate unmeshed areas, free edges, proximities and penetration

areas, duplicate elements etc.)

Comprehensive mesh information and quality statistics

Quality check according to

multiple criteria (skewness, angle

squish, length, aspect, warp, etc)

and solvers (Fluent, Star, OpenFOAM etc)

Clear identification of poor-quality elements

Surface meshing - Checks

Automatic and manual functions

for mesh quality improvement


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Double parallel model management tools: Properties (corresponding to CFD model zones)

and Parts (assembly hierarchy extracted from CAD data)

CFD model management

Properties

Parts


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Functionality to compare current model with updates in other ANSA files, identify

differences in geometry, or other attributes, and automatically update the current model

with the necessary differences only

CFD model management

Current model

Updated version of the model in

different file overlaid for

comparison

Current model with replaced areas

automatically identified from

updated model


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Fully automatic volume and sub volume detection applicable to the most complex problems

By permission of

FORD WERKE GmbH

Volume meshing


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By permission of Volkswagen AG

Fast and robust volume meshing for all types of elements

(tetra, pyramid, prism, hexa and polyhedron)

Volume meshing


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Volume meshing: Definition of multiple fluid and solid zones

Non-conformal mesh

for moving mesh analysis

Conformal mesh for MRF and porous zones and for conjugate heat transfer analyses


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Courtesy of Actiflow BV

Volume meshing: Solar car and urban enviroment CFD simulations


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Volume meshing: EV-55 outback CFD study

Courtesy of Evektor


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Fully-conformal variable size Hexa-Interior mesh with prism and pyramid transitions

Hexa Interior algorithm


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Polyhedral type volume meshing algorithm

Variable size hexa mesh with polyhedral elements for transitions


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Size Boxes controlling max element size

Volume meshing: Size Boxes


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Trim hexa/polyhedral mesher

Fully automated, highly controllable, trim hexa and polyhedral mesh generation without the need

for watertight volume definitions, running on multi core machines


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Multiple options:

Auto exclude or

collapse areas

Controlled

Layer Squeezing to

avoid intersections

Layers from selectedareas with different

settings

Layers from

zero-thickness walls

Volume meshing: Boundary layers generation


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Boundary layers exclude mode

Automatic fix of intersection and proximities in any of three options

Squeeze option Collapse option Exclude option

Collapse free edges


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X number of inner layers in

absolute mode

Y number of additional outer

layers in aspect mode

Ability to create an X number of layers in absolute height mode and then switch to aspect mode

for the outer additional layers, thus ensuring a good cell volume change between the layers and

the tetra mesh

Flexible specification of layer growth


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Conversion of hybrid to polyhedral meshes


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Volume meshing: Hexa/Penta map meshing

By permission of

City University racing team


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Hexa meshing based on block structures associated to the model

HexaBlock meshing

Global box Box splitting Deletion of unneeded

boxes

Snapping of points Snapping of edges Hexa mesh with

O-GRID patterns


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Numerical simulation of flow through S-duct - 1st Propulsion Aerodynamics Workshop July 2012

HexaBlock meshing


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Hexa meshing based on block structured boxes

HexaBlock meshing


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Batch Mesh tool for complete CFD meshing automation


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Automated mesh refinement study - 1st High Lift Prediction Workshop

Coarse


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Medium



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Fine



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Output also in CGNS, CFX5 and SC/TETRA

Boundary Condition type specification for various CFD solvers


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Full support of OpenFOAM mesh and case setup

Boundary conditions, porous and MRF zones, turbulence models, controlDict support, integrated

checkMesh and more


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Direct I/O of native *.tdf files (Radtherm) and *.tfe files (Theseus-FE)

Support of shell and solid mesh, Parts (single and multilayer)

and Assemblies, Materials, Boundary conditions

and main solver settings

Thermal Management simulations support for RadTherm and Theseus-FE


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ANSA M hi


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ANSA Morphing

ANSA morphing tool has the following advantages:

- It provides flexible parameterization of your CFD model

- It is highly controllable allowing the user to perform the exact modifications that are required

- It allows scaling and history tracking of morphing actions

- It is applicable to surface & volume mesh and geometry

- It employs fast morphing algorithms that can be used efficiently and robustly on large CFD models

- It is integrated in the same environment so that it can be used in conjunction with the powerful

ANSA functionality for geometry handling and surface and volume meshing

- Morphing can be performed interactively or in pure batch mode, also coupled with optimizer

software

- It can be used with direct interfaces with all major CFD codes, like Fluent, Star CCM+, and

OpenFOAM among others

M hi


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Morphing of shell and volume mesh by user-interaction, or in batch mode accelerates engineering

development

Morphing

M h R t ti ft l d f ti


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Mesh Reconstruction after large deformations

Original mesh After morph

Skewed solids Reconstruction

M hi R i d h


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Morphing Rear windscreen morph

By permission of Volkswagen AG

Morphing External Aero


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Morphing External Aero

Morphing rudder angle change


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Morphing rudder angle change

Morphing External Aero changing the gap of trains


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Morphing External Aero changing the gap of trains

Morphing Scaling deformations


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Morphing Scaling deformations

Adjoint solver sensitivity based optimization


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Sensitivity Based optimization with ANSA morphing boxes and parameters that control the motion

of morphing points using solver calculated sensitivities

Adjoint solver sensitivity based optimization

Morphing of Geometry or FE without Boxes


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Morphing of Geometry or FE without Boxes

Frozen Curves

Origin Curves

Target Curves

Translation

Combinations of snapping of model features to target curves and rigid transformations

Fitting existing underbody on new vehicle external upper skin


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New model surface design

Old underbody

Old wheels and exhaust system

An old vehicle underbody is to

be fitted on the new vehicle

external skin for initial design

simulation

Morphing and mesh

connecting techniques are

used to create a watertight

surface

Fitting existing underbody on new vehicle external upper skin

Adjusting Underbody floor with Boxless Morphing tools


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Orange colored areas are

translated as a frozen body and

magenta colored area is

morphed in order totransform the dimensions of the

underbody

The upper and lower

assemblies do not match

initially. There are gaps andnon corresponding areas all

around the perimeter




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Final adjustments for the front

wheel arch fitting on the new

upper vehicle skin are performed

with direct edge fitting (green to

orange)


Morphing Optimization loop


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Morphing Optimization loop

OPTIMIZER

CL,CD

p1,p2,p3

optimump1,p2,p3

optimized CAD

original CAD mesh model

meshing &

morphing

geometry

morphing

CFD FEA two way coupling


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CFD FEA two way coupling

Create a model in ANSA and

solve in CFD solver

Extract the pressures from the

CFD solver and map them on an

FEA mesh using ANSA Results

Mapping tool

Perform an FEA simulation to

calculate the deformations

Feed in the calculated deformations in

ANSA morphing tool to deform the

original CFD mesh in the exact same

manner


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Fuel and resting liquid calculations


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Calculation of liquid volume, levels

and centre of gravity for various tank configurations and

positions

Unused liquid traps

Fuel and resting liquid calculations

One common pre-processing platform for several codes


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One common pre processing platform for several codes

NASTRAN, ABAQUS, ANSYS,

RADTHERM and more

FLUENT

STAR-CD

SC/TETRACFD++

CGNS

CFX

STAR CCM+

POWERFLOW(NASTRAN) OPENFOAM


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About ETA post-processor


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p p

An advanced CAE post-processing tool for structural analysis

- Extended its support to CFD codes

Basic concepts and features inherited from the other fields:

- Fast handling and processing of results (multi-core support)

- High performance graphics

- Low memory footprint

- Broad coverage of result types

- User friendly and flexible interface

- Wide range of tools

- Automation capabilities

- Report Composer and SpreadSheet editor

Supported formats


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pp

- Fluent 2d and 3d *.msh, *cas, *dat

- ascii/binary data

- Partitioned results

Fluent

OpenFOAM

- Ensight format results support

Ensight

- *.ccm files

StarCCM+

CFD++

Supported Features


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- Polyhedral Elements support

- MRF (multiple reference frame) zones and moving mesh support

Visualization of Cut Planes, Contours and Vectors


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Visualization of Streamlines and Iso-surfaces


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Exploded view

of assembly

Multiple streamline visualization options


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Video generation for steady or transient simulations


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Camera Match tool


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Correlate physical images and videos with CFD results

Multi Windows


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- 3d and 2d windows

- Setup styles and entities visibility per window

- Different models can be placed in one or more windows

Results comparison


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Compare cases from different solvers or scenarios

Model Overlay


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Overlay and compare multiple iterations of data

- Set the respective files or paths of the second model

- All new data are automatically overlaid on the respective windows

Query of model dimensions


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- Measurement of distances

- Projected Area measurement

Projected Area: 1.884

Calculations


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- Drag/Lift Forces and Coefficients

- Moments

- Surface/Volume integrals

- Results Sum, Average, Difference

- Pressure Drop example:

Surface Integrals

- - - - - - - - -

Pid Name Area Weighted Average

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

2 interior_downstream_cat 1187.68000

3 interior_upstream_cat 17057.3000

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Sum 18244.98

Avg 9122.49

Diff 15869.62

Plots


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Cd/Cl plots vs Time/Distance

Project Files


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Output all current entities, results & objects in a project file

Cut Planes

Geometry

WindowsStreamlines

Results

2d Plots

AnnotationsTest Data

Report

Project File

ETA native binary format file

ETA Viewer


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- License free reduced version of

- Web Browser, PowerPoint Plug-in and standalone executable

- Loads Project Files only

Vieweras PowerPoint

Plug-in in Slides

Report capabilities


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- Create HTML, PPTX or PDF reports

- Add images and videos

- Support ofETAviewer objects

- Reports can be tagged, stored and quickly recovered


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Scripting language support in ANSA and ETA


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Creation of user defined functions through scripting for automation and customization of

specific tasks, extending further the softwares functionality

Build-in script editor for script creation, debugging and execution

PYTHON programming language support

Application industries


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Marine

Motorsports

Aerospace

Rail

Automotive

and more..

Energy

Electronics

Conclusions


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ANSAcovers all the CFD pre-processing needs in a single environment,eliminating the need to use task-specific software and the exchange of data in between, thus

minimizing cost and time.

Novel features such as powerful geometry handling, fully automated CFD surface and volume mesh

generation, intelligent surface wrapping and morphing, allow engineers to obtain high quality results

faster.

ETAprovides powerful automated post-processing for CFD and integrates with ANSAas a complete

pre and post-processing solution for industrial applications.

For more information please contact us at:

e-mail: [email protected]

URL: http://www.beta-cae.gr

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