An embedded mesh coupling of overlapping Lagrange and ALE meshes.

Abstract:

Coupling overlapping meshes typically in the form of a Lagrangian foreground and Eulerian background mesh has been shown to be very useful for simplifying model development and solving difficult fluid structure interaction problems. To this end, there are many different coupling techniques: immersed boundary, fictitious domain, embedded mesh etc. Each of these methods differ by how the constraint is computed and enforced (e.g. penalty, Lagrange multipliers, Nitsche etc.) Here, an embedded mesh approach using a stabilized Lagrange multiplier method is presented along with some details on how contacting foreground bodies and parallelization is implemented. The stability of the time integration of the fluid-structure interaction problem is addressed in detail and a variety of numerical examples are presented demonstrating the robustness of the approach.

Biography:

Michael Puso Research Engineer at Lawrence Livermore National Laboratory, California. He was at UC Berkeley from 2004-2006 and obtained his PhD at the University of California, Davis. Michael Puso develops and maintains computational mechanics and physics software and conducts research in the areas of interface mechanics, fluid-structure interaction and finite element technology.