This document summarizes CFD capabilities in Altair's HyperWorks suite. It discusses pre-processing tools like HyperMesh and AcuConsole for grid generation. It outlines CFD solvers like AcuSolve and Radioss. It also reviews post-processing tools like AcuFieldView and HyperView. Upcoming enhancements in the next release include surface remeshing within refinement boxes, defining separate solid and fluid volumes, and simplified boundary selection.

1. CFD and more with Acusolve and HyperWorks
Innovation Intelligence®
Dr. Marc Ratzel, Program Manager CFD
David Corson, Program Manager AcuSolve

2. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Agenda
• Overview, CFD solutions in HyperWorks
• Pre-processors / Solvers / Post-processors included in the HW suite
• HyperMesh/HyperView for CFD applications
• Grid generation in HyperMesh
• Basic AcuSolve case setup in HM
• Post-processing in HyperView
• Outlook to next update release SA-130
• Multi physics in AcuSolve
• Overview of Multi physics capabilities
• AcuSolve-Radioss coupling
• Advanced model setup using AcuConsole
• Efficient CFD analysis of a race car using Altair tools
• HyperMesh, AcuConsole / AcuSolve / AcuFieldView

3. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
CFD solutions in HyperWorks
Radioss Radioss
(linear, static) (non-linear, implicit, dynamic)
Loads (T,p,
…) DC-FSI
P-FSI
(eigenmodes) (co-simulation)
AcuConsole AcuSolve AcuFieldView
HyperMesh Radioss HyperView
(CFD, FSI)
Pre-processor Solver Post-processor

4. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Pre-Processing
• AcuConsole
• Dedicated pre-processor for AcuSolve
• Fast and robust CFD meshing (e.g. 90Mio tetras external automotive 80min)
• HyperMesh
• Solver neutral CFD grid generator
• Powerful geometry cleanup/generation tools
• One pre-processor for structural and CFD analysis
HyperMesh AcuConsole

5. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Solver
• Radioss CFD/FSI
• Explicit multi-physics solver
• Coupled solver (structure + fluid)
• Suited for compressible flow
• AcuSolve
• Implicit multi-purpose CFD solver
• Finite element based
• Strong FSI capabilities (P-FSI, DC-FSI)
Courtesy of HTT
AcuSolve Radioss

6. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Post-Processing
• AcuFieldView
• Dedicated CFD post-processor (OEM version of FieldView, Intelligent Light)
• Supports only AcuSolve results
• Client-server architecture, 8 way parallel
• HyperView
• Solver neutral CFD post-processor
• Showing structural and CFD results
pressure Top. Optim. streamlines
in one framework
eigenmodes
HyperView
AcuFieldView

7. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Agenda
1. Access to CFD meshing tools in HyperMesh
• CFD user profile in HyperMesh
• CFD tetramesh panel
2. Demos
• Basic meshing of an exhaust system
• Considering variable boundary layer thickness
• Improving mesh quality
• Mixed tetra-hexa meshing
3. Upcoming release SA-130, new meshing features
4. Basic AcuSolve case setup in HyperMesh
5. Post-processing of CFD results in HyperView

8. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
CFD user profile
• New GUI design for CFD applications
• Quick access to CFD features
• Aligned to CFD workflow

9. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
CFD tetra mesh panel (access)
Drop down Toolbar
Panel

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CFD tetra mesh (four sub panels)
Boundary selection
• select boundaries
• define regions with BL
Boundary Layer settings
• 1st cell height
• # of layers
Tetramesh settings
• growth rate
• elem. criteria threshold
Refinement box
• local tetra refinement
• adapt size/location

11. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Demo (variable BL thickness / mixed hexa-tetra mesh)
HyperWorks Desktop: one framework for pre + post

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New CFD features, next release (SA-130)
• Surface remeshing if included in refinement box
BL surface elements Remeshed surface
included with BL
Refinement box (tetra
mesh refinement)

13. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Demo (refinement box, surface remeshing)

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New CFD features, next release (SA-130)
• Define solid and fluid volume (e.g. electronic cooling)
Fluid (with BL)
Solid (no BL)
BL only in
fluid domain
Separate components
for each volume

15. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
New CFD features, next release (SA-130)
• Simple boundary selection option
• Reduces the boundary selection to a minimum
Select all bounding regions
Select inflow/outflow
Simple selection
No BL on interfaces

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Demo (simple selection, fluid/solid)

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Basic AcuSolve case setup in HyperMesh
• Currently only basic setup features are supported in HyperMesh
• Further development planned for future
Physics/numerics
Comps, BC
Materials

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Demo (AcuSolve setup in HyperMesh / HyperView for CFD)

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AcuSolve case setup in HyperMesh
Property sheet Inflow BC
Property sheet Material def.

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AcuSolve case setup in HyperMesh
AcuSolve Job Launcher AcuProbe

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Alternative: HyperMesh à AcuConsole
• Launch AcuConsole from HyperMesh and transfer model
• Perform case setup in AcuConsole
HyperMesh
AcuConsole

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Demo (Morphing, new run)

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HyperStudy / Morphing for CFD optimization
Challenges: inflow
• Increase manifold efficiency
Solution:
• Create shape variables using HyperMorph
• Run optimization to maximize flow uniformity
while meeting the constraints on back
pressure Cross section
for uniformity
Results :
• 7% increase in flow uniformity
• 2 days for design optimization outflow
initial design Velocity contour optimized design Velocity contour
Presented at EHTC 2009 by Bosal

24. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Summary
CFD meshing (HyperMesh)
• Wide range of geometry cleanup/generation functionalities
• Solver neutral (AcuSolve, CFD++, CFX,…)
• High quality volume grids (hybrid, hex-core, hex-only,..)
Next release SA 130
• Various new CFD meshing features
Morphing for CFD
• Quick design changes without re-meshing
CFD post-processing (HyperView)
• Data exchange via Ensight format
• Streamlines, contour plotting, iso-surfaces,…
AcuSolve
• Basic AcuSolve case setup in HyperMesh

25. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Agenda
• Overview, CFD solutions in HyperWorks
• Pre-processors / Solvers / Post-processors included in the HW suite
• HyperMesh/HyperView for CFD applications
• Grid generation in HyperMesh
• Basic AcuSolve case setup in HM
• Post-processing in HyperView
• Outlook to next update release SA-130
• Multi physics in AcuSolve
• Overview of Multi physics capabilities
• AcuSolve-Radioss coupling
• Advanced model setup using AcuConsole
• Efficient CFD analysis of a race car using Altair tools
• HyperMesh, AcuConsole / AcuSolve / AcuFieldView

26. HyperMesh/AcuConsole/AcuFieldView
Race Car Model
Altair Engineering, Inc.
June 6, 2012
Innovation Intelligence®

27. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Race Car – Overview
• What you will learn
• How to use HyperMesh and AcuConsole together for model set-
up
• Surface meshing in HyperMesh
• Volume meshing in AcuConsole
• AcuFieldView post-processing
• Basic operation
• Automation using restart files
• Client-server operation
• Client-server parallel operation

28. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Race Car – AcuFieldView
AcuFieldView Overview Many New Features
• OEM version of FieldView based on FV 13 • Redesigned, unified Graphical User
• Included with AcuSolve V1.8b product Interface
suite • Sweep caching of transient data
• Functions only with AcuSolve generated • Improved graphics performance
results data • New file browsers which recall previous
locations

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Race Car – AcuFieldView
Fully featured
• Supports all features of
FieldView AcuSolve
• No model size limits
• No limits on visualization Database
object count
Customize/Automate FV-UNS
• Full support of FVX Direct
scripting/automation format read
• Runs in true batch mode
• Integrated with AcuReport
Data Access
• Direct database read
• Conversion to FV-UNS format
• Local client/local server
• Local client/remote server
• Up to 8 processor parallel
operation

30. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Race Car – Finished Product

31. AcuSolve Fluid/Structure Interaction
Demo – Yield Sign Flutter
Altair Engineering, Inc.
June 6, 2012
Innovation Intelligence®

32. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
FSI Demo - Overview
• What you will learn
• Multiphysics capabilities of AcuSolve
• P-FSI vs. DC-FSI
• AcuSolve modeling process
• Interoperability of AcuSolve with RADIOSS
• Basic CAD associativity within AcuConsole
• How to set up multiphysics simulations using AcuConsole

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FSI Demo – Supported Physics
• Multiphysics
• Rigid Body Dynamics Coupling
• 6-DOF rigid body solver
• No multi body dynamics
• Practical Fluid/Structure Interaction (P-FSI)
• Structural displacement computed by AcuSolve
• Based on modal superposition
• Limited to linear structural displacements
• Supported with RADIOSS, Abaqus, Nastran
• Directly Coupled Fluid/Structure Interaction (DC-FSI)
• Codes communicate at run time
• Loads/displacements exchanged
• Supported with RADIOSS, Abaqus, MD-Nastran

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FSI Demo – Problem Description
• Road sign flutter under high wind
• Geometry constructed in SolidWorks
• Structural model(s) built using HyperMesh
• CFD model built using AcuConsole
• Practical Fluid/Structure Interaction (P-FSI) and Directly Coupled Fluid/
Structure Interaction (DC-FSI) technology used

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FSI Demo – Results
• Displacement from P-FSI case

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FSI Demo - Results
• Finished product