htc2012_cfd_training.pdf
DESCRIPTION
Altair Hyperworks AccuSolve introduction slidesTRANSCRIPT
Innovation Intelligence®
CFD and more with Acusolve and HyperWorks
Dr. Marc Ratzel, Program Manager CFD David Corson, Program Manager AcuSolve
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
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
CFD solutions in HyperWorks
AcuConsole
HyperMesh
AcuSolve
Radioss (linear, static)
Radioss (non-linear, implicit, dynamic)
Radioss (CFD, FSI)
HyperView
AcuFieldView
Pre-processor Solver Post-processor
P-FSI (eigenmodes)
DC-FSI (co-simulation)
Loads (T,p,…)
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
AcuConsole HyperMesh
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
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
in one framework
HyperView
AcuFieldView
eigenmodes
pressure Top. Optim. streamlines
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
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
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
CFD tetra mesh panel (access)
Drop down
Panel
Toolbar
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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
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
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
New CFD features, next release (SA-130)
• Surface remeshing if included in refinement box
Remeshed surface with BL
BL surface elements included Refinement box (tetra
mesh refinement)
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Demo (refinement box, surface remeshing)
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
New CFD features, next release (SA-130)
• Define solid and fluid volume (e.g. electronic cooling)
Solid (no BL) Fluid (with BL)
Separate components for each volume
BL only in fluid domain
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
Simple selection
Select all bounding regions
Select inflow/outflow
No BL on interfaces
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Demo (simple selection, fluid/solid)
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Demo (AcuSolve setup in HyperMesh / HyperView for CFD)
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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: • Increase manifold efficiency
Solution: • Create shape variables using HyperMorph • Run optimization to maximize flow uniformity
while meeting the constraints on back pressure
Results : • 7% increase in flow uniformity • 2 days for design optimization
inflow
outflow
Cross section for uniformity
initial design optimized design Velocity contour Velocity contour
Presented at EHTC 2009 by Bosal
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
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
Innovation Intelligence®
Altair Engineering, Inc. June 6, 2012
HyperMesh/AcuConsole/AcuFieldView Race Car Model
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
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
AcuFieldView Overview • OEM version of FieldView based on FV 13 • Included with AcuSolve V1.8b product
suite • Functions only with AcuSolve generated
results data
Many New Features • Redesigned, unified Graphical User
Interface • Sweep caching of transient data • Improved graphics performance • New file browsers which recall previous
locations
Race Car – AcuFieldView
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
AcuSolve Database
FV-UNS format
Direct read
Data Access • Direct database read • Conversion to FV-UNS format • Local client/local server • Local client/remote server • Up to 8 processor parallel
operation
Fully featured • Supports all features of
FieldView • No model size limits • No limits on visualization
object count
Customize/Automate • Full support of FVX
scripting/automation • Runs in true batch mode • Integrated with AcuReport
Race Car – AcuFieldView
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Race Car – Finished Product
Innovation Intelligence®
Altair Engineering, Inc. June 6, 2012
AcuSolve Fluid/Structure Interaction Demo – Yield Sign Flutter
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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
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
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
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
FSI Demo – Results
• Displacement from P-FSI case
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
FSI Demo - Results
• Finished product