high fidelity cfd solutions fluid structure interaction ... · zto release q1-2010 with md nastran...
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ACUSIM Software Inc., 2685 Marine Way, Suite 1421, Mountain View, California 94043Tel: (650) 988-9700 Fax: (650) 988-9770 [email protected] http://www.acusim.com
AcuSolve™:
High Fidelity CFD SolutionsFluid Structure Interaction
Accessible Via Altair HWEC
Acusim Software Inc. Proprietary Information
Farzin Shakib November 3, 2009
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AcuSolveAcuSolve
A powerful general-purpose finite element flow solver
AcuSolve’s differentiation:Robustness Most problems solved on the first attemptSpeed Coupled solver on distributed parallel machinesAccuracy Highly accurate in space and time while
globally and locally conservativeFeatures Rich set of functionality; continuously growing
An ideal enabling technology for integrated engineering and scientific applications
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Main FeaturesMain Features
Physics:Incompressible & weakly compressible Navier-StokesThermal analysis
Conjugate heat transferMulti-layered thermal shellEnclosure radiation – View factorsSolar radiation
Multi-species transport equations
Turbulence:Spalart-Allmaras RANS modelDynamic subgrid LES modelsHybrid RANS/LES (DES) model & (DDES)
Time accurate transient simulationCoupled with control systems
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Main Features (cont)Main Features (cont)
Arbitrary Eulerian LagrangianFlexible mesh motionFree surfaceGuide surfaceSliding mesh
Fluid/Structure InteractionsPractical FSI (P-FSI)Direct Coupling FSI (DC-FSI)Rigid body & flow coupling
Support for ComputationalAero Acoustics (CAA) simulationsParticle Tracer
Steady & Transientand many more …
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AcuConsoleAcuConsole
GUI-base preprocessor for AcuSolveStarts from CAD or MESH
ProE, Parasolid, ACIS, Catia V5, DiscreteHypermesh, ICEM, Harpoon, GridGen, PointWise, …
Generate mesh from CADAutomatic tet mesherBoundary layer
Full problem specificationGlobal parametersBoundary conditions, etc.
Launch solverMonitor progress
Customizable for easy deployment
Integrated With Altair ToolsIntegrated With Altair Tools
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Hypermesh
Hyperview
AcuSolve
FSI TechnologyFSI TechnologyPractical FSI
Modal response of solid/structure given to AcuSolveGUI tools to extract/project directly from ODB and OP2 files
AcuSolve runs by itselfFast, easy and robustAccommodates linear solid/structure interactions
Released Q2-2004
Direct-Coupling FSITight coupling of AcuSolve & Solid/Structural Code
Two codes run in tandem Projection & interpolation performed by AcuSolveNo intervening middleware
Released Q2-2007 With Abaqus 6.7To Release Q1-2010 With MD Nastran R4
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Wind Turbine ModelingWind Turbine Modeling
National Renewable Energy Laboratory (NREL) modelTransient Sliding Mesh Model - Flexible Blades
Total of 20 structural modes computed using Abaqus/Standard.
Wind TurbineWind Turbine
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Flow Restrictor ProblemFlow Restrictor Problem
Problem description:Flow rate = 7 GPMSolid material = rubberFluid = Ethylene glycolMass-density ratio = 1.2Rubber contacts plate in the back
Closes fluid gap
Results:DC-FSI with Abaqus/StandardSolution is unstable using classical coupling techniquesMulti-Iterative Coupling (MIC) achieves stable solutions
At all flow rates
Sample FSI SolutionsSample FSI Solutions
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Door SealFlow induced by volume changeAbaqus
Wing FlutterMach 0.5
Experimental validationMD Nastran
Sample FSI Solutions (cont)Sample FSI Solutions (cont)
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Riser Vortex Induced Vibration (VIV)L/D as high as 10000Excess of 100M fluid elementsRequires motion of boundary
Spool VIVCAE automation
Vertical application
Extensive validationPublished by end users
Sample FSI Solutions (cont)Sample FSI Solutions (cont)
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Shock absorber problemP-FSI solution
Initial gap 0.01 mm Final gap 0.117 mm
Sample FSI Solutions (cont)Sample FSI Solutions (cont)
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Vacuum cleanerSlide interface allows larger motions
Abaqus Standard
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ConclusionsConclusions
AcuSolve is a powerful general purpose CFD codeThe premier commercial finite element based CFD solver
AcuSolve has two FSI capabilitiesPractical FSIDirect-Coupling FSIBoth stable for a wide-range of problems
AcuSolve is accessible through Altair HWEC programWell Interfaced with Hypermesh, Hyperview and Radioss