La lecture à portée de main
Découvre YouScribe en t'inscrivant gratuitement
Je m'inscrisDécouvre YouScribe en t'inscrivant gratuitement
Je m'inscrisDescription
Sujets
Informations
Publié par | pefav |
Nombre de lectures | 9 |
Langue | English |
Poids de l'ouvrage | 7 Mo |
Extrait
Onera Symposium High Fidelity Flow Simulations
Chatillon, October 2010
Efficient Numerical Simulation of Flows
Interacting with Deformable Structures
Michael Schäfer
Contents
Introduction
Numerical Methods
Thanks to
Efficiency and Accuracy
D. Sternel, S. Yigit,
Extensions M. Heck, S. Sachs,
Conclusions G. Becker Fluid-Structure Interaction
• Deformation by fluid forces
• Momentum by movement/deformation
• Change of geometry
TU Darmstadt | FNB | M. Schäfer | 2 Numerical Coupling Mechanisms
Fluid Structure Flexibility Robustness
Weak
coupling
(partitioned)
Strong
coupling
(monolithic)
TU Darmstadt | FNB | M. Schäfer | 3 Partitioned Coupling
Explicit Implicit
Fluid Fluid Fluid Fluid
Structure Structure Structure Structure
t t+Δt t+Δt t
Combines:
- Flexibility of partitioned approach
- Robustness of monolithic approach
TU Darmstadt | FNB | M. Schäfer | 4 Coupled Partitioned Solution Procedure
FSI iteration
Finite-volume Grid
movement FASTEST
MpCCI
Finite-element Fluid
forces FEAP
TU Darmstadt | FNB | M. Schäfer | 5 Grid Movement
TU Darmstadt | FNB | M. Schäfer | 6 Grid Movement Concept
Blocks:
Primary moving
Secondary moving
Fixed
Edges:
Fixed
Newly generated (linear, cubic splines)
Faces:
- Fixed
- Coupling
- Copied
- Parallel
- Newly generated (linear, TFI, elliptic)
Inner grids:
linear, TFI, elliptic
TU Darmstadt | FNB | M. Schäfer | 7
Elliptic Grid Movement
Parameter domain Physical domain Computational domain
Spekreijse 1995
TU Darmstadt | FNB | M. Schäfer | 8 Example: Error by Grid Deformation
TU Darmstadt | FNB | M. Schäfer | 9 Turbulent FSI and Grid Movement
TU Darmstadt | FNB | M. Schäfer | 10