Coupling approaches and embedded Dirichilet formulation for 3D fixed-grid fluid-structure-interaction

This talk discusses the development of a new fixed grid fluid-structure inter- action scheme that can be applied to real world problems of the 3-dimensional interaction of most general structures exhibiting large deformations with incompressible flow. The new scheme stands out by some superior characteristics as compared to existing fixed- grid approaches. It is based on an eXtended Finite Element Method (XFEM) strategy to enrich the fixed Eulerian fluid field with moving interfaces. The fluid is coupled to the Lagrangian structural field using a novel Lagrange multiplier technique for embedded Dirichlet conditions on non-matching grid. For the FSI solution, both partitioned-iterative and monolithic approaches can be used. Qualitative examples and comprehensive bench- mark computations demonstrate key features and accuracy of the method.     «

This talk discusses the development of a new fixed grid fluid-structure inter- action scheme that can be applied to real world problems of the 3-dimensional interaction of most general structures exhibiting large deformations with incompressible flow. The new scheme stands out by some superior characteristics as compared to existing fixed- grid approaches. It is based on an eXtended Finite Element Method (XFEM) strategy to enrich the fixed Eulerian fluid field with moving interfaces. The fluid i...     »