Author(s)

J.E. Guilkey, T. Harman, A. Xia, B. Kashiwa & P. McMurtry

Abstract

An Eulerian-Lagrangian approach for large deformation fluid structure interaction problems, Part 1: algorithm development J.E. Guilkeyl, THarrnanl, A. Xial, B. Kashiwa2, & P. ~ c ~ u r t r y l Dept. of Mechanical Engineering, University of Utah, Salt Lake City, USA Theoretical Division, Los Alamos National Laboratory, Los Alamos, USA Abstract A numerical algorithm for tightly coupled, high-deformation fluid-structure interaction problems is presented. The foundation of the method is the integration of a Lagrangian particle technique (the Material Point Method, or MPM) with a multimaterial Eulerian code. In this approach, each material is described and evolves in its preferred reference frame (e.g., Lagrangian for solids, Eulerian for fluids). The MPM uses a background mesh to update particle states. By using the Eulerian multi-material mesh as the background mesh to update particle states, the solid materials have a dual representation in the Lagrangian and Eulerian frame. It is in this common

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