INVESTIGADORES
STORTI Mario Alberto
capítulos de libros
Título:
Fluid Structure Interaction and Galilean Invariance
Autor/es:
GARELLI, L.; PAZ R.; CASTRO, HUGO GUILLERMO; STORTI M.; DALCÍN LISANDRO
Libro:
Computational Fluid Dynamics Theory, Analysis and Applications
Editorial:
Nova Publishers
Referencias:
Lugar: Hauppage, New York; Año: 2010;
Resumen:
ltidisciplinary and Multiphysics coupled problems represent nowa- days a challenging field when studying or analyzing even more com- plex phenomena that appear in nature and in new technologies (e.g. Magneto-Hydrodynamics, Micro-Electro-Mechanics, Thermo-Mechanics, Fluid-Structure Interaction, etc.). Particularly, when dealing with Fluid- Structure Interaction problems several questions arise, namely the cou- pling algorithm, the mesh moving strategy, the Galilean Invariance of the scheme, compliance with the Discrete Geometric Conservation Law (DGCL), etc. Therefore, the aim of this chapter is to give an overview of the issues involved in the numerical solution of Fluid-Structure In- teraction (FSI) problems. Regarding the coupling techniques, some results on the convergence of the strong coupling Gauss-Seidel iteration are presented. Also, the precision of different predictor schemes for the structural system and the influence of the partitioned coupling on stability are discussed. Another key point when solving FSI problems is the use of the “Arbi- trary Lagrangian Eulerian formulation” (ALE), which allows the use of moving meshes. As the ALE contributions affect the advective terms, some modifications on the stabilizing and the shock-capturing terms, are needed. Also Dirichlet constraints at slip (or non-slip) walls must be modified when the ALE scheme is used. In this chapter the presented ALE formulation is invariant under Galilean transformations.