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ALE formulation for fluid–structure interaction problems

✍ Scribed by M. Souli; A. Ouahsine; L. Lewin

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
783 KB
Volume
190
Category
Article
ISSN
0045-7825

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✦ Synopsis

Arbitrary Lagrangian Eulerian (ALE) ®nite element methods gain interest for the capability to control mesh geometry independently from material geometry. In ¯uid±structure interaction problems, where the ¯uid mesh near the structure undergoes large deformations and becomes unacceptably distorded, which drive the time step to a very small value for explicit calculations, the ALE methods or rezoning are used to create a new undistorted mesh for the ¯uid domain, which allows the calculations to continue. The mathematical basis of the ALE and rezoning algorithms is simple, but their implementation is complicated due to the tedious geometrical calculations associated with handling an arbitrary mesh. In this paper we apply the ALE concept to ¯uid±structure interaction problems. We will explain the underlying ideas of the method and a possible way to control the distortion of the mesh is given. Results of an academic as well as an industrial problem are presented.

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