A Modular Simulation Environment for Fluid-Structure Interactions · 2008. 10. 22. · FSI*ce...
Transcript of A Modular Simulation Environment for Fluid-Structure Interactions · 2008. 10. 22. · FSI*ce...
Herrsching, 30.9.2008, Miriam Mehl
FSI∗ceA Modular Simulation Environment
for Fluid-Structure Interactions
Miriam MehlDepartment of Computer Science, TU München
Herrsching, 30.9.2008, Miriam Mehl
Outline
concept of FSI*cedata transfer for non-matching grids
octree neighboorhood search
coupling controlmultigridfurther potential
Herrsching, 30.9.2008, Miriam Mehl
Plug-and-Play for FSI
Fluid Solver
Structure Solver
MpCCI
coupling strategydata mapping
Herrsching, 30.9.2008, Miriam Mehl
Plug-and-Play for FSI
Fluid Solver
Structure Solver
MpCCI
Herrsching, 30.9.2008, Miriam Mehl
Plug-and-Play for FSI
Fluid Solver
Structure Solver
FSI∗ce
Coupling StrategyCentral Surface Mesh
Herrsching, 30.9.2008, Miriam Mehl
Data Mapping
• any types of solver grids• tools:
• neighbourhood search• interpolation/projection
Herrsching, 30.9.2008, Miriam Mehl
Data Mapping
central mesh
octree
grid point triangle +projection
Herrsching, 30.9.2008, Miriam Mehl
octree depth
time (sec)
nodes
7 0.8 203,9059 4.9 3,288,225
11 48.2 52,662,33713 662.8 842,687,105
Data Mapping – Octree Generation
octree generation measured on a Pentium 4 2.4 GHz processor with 512 kB cache
Herrsching, 30.9.2008, Miriam Mehl
17.4 sec128,00051214.3 sec32,00051210.1 sec8,000512
2.6 sec8,000256runtime# triang.Cart.res.
neighbourhood search measured on a Pentium M 1.6 GHz processor with 2048 kB cache
Data Mapping – Neighbourhood Search
Herrsching, 30.9.2008, Miriam Mehl
Coupling Control
explicit/implicit
subcycling
next: multigrid
Herrsching, 30.9.2008, Miriam Mehl
Coupling Control – Multigrid
solve fluidexchange datasolve structureexchange data
compute residualrestrict residualsolve coarse
Herrsching, 30.9.2008, Miriam Mehl
Coupling Control – Multigrid
FSI*ce Solvermultigrid cycles multigrid functionalityrestrict central mesh extended data mapping
setup-phase for central mesh hierarchy
Herrsching, 30.9.2008, Miriam Mehl
Coupling Control – Multigrid
benefits of multigrid:• Bijl, van Zuijlen, Boscher, ECCOMAS CFD 2006:
eff. gain: factor 101D linear piston problemtwo-grid solver, coarsening in the fluid only
Herrsching, 30.9.2008, Miriam Mehl
Central Mesh – Further Potential
Source: Mike R. Ross, PhD thesis, 2006
• third numerical component: the wet surfaceLLM transient method (Park, Felippa, Ohayon, 2001,
Ross, 2006)
Herrsching, 30.9.2008, Miriam Mehl
stableparallel
Source: Mike R. Ross, PhD thesis, 2006
Central Mesh – Further Potential
Herrsching, 30.9.2008, Miriam Mehl
Source: Mike R. Ross, PhD thesis, 2006
Central Mesh – Further Potential
Herrsching, 30.9.2008, Miriam Mehl
Central Mesh – Further Potential
Vierendeels, LNCSE 53, Springer, 2006.
fluid solver
struct. reduced
fluid reduced
struct. solver
FSI*ce
1
3
4
2reduced order models
implicit couplingblack box solvershigh efficiency
Herrsching, 30.9.2008, Miriam Mehl
Conclusion
flexibility
solvers, coupling strategy
enhanced coupling strategies
multigrid
interface equation
reduced order models