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Deriving adequate formulations for fluid-structure interaction problems : from ALE to transpiration

By Thierry Fanion, Miguel Angel Fernández and Patrick Le Tallec

Abstract

International audienceMost formulations describing low speed large displacements fluid-structure interaction problems use a totally lagrangian formulation for the structure, and an Arbitrary Euler Lagrange (ALE) formulation for the fluid. The purpose of the present paper is to review the derivation of such formulations, to describe different time discretisation strategies and to explain the type of numerical problems which arise when implementing these techniques. To overcome all technical difficulties arising when dealing with moving grids, we will also explain how an adequate asymptotic expansion can reduce the problem to a standard problem written on a fixed conf iguration, but using specific transpiration interface boundary conditions. This last formulation is rather popular in the aeronautical community, and will be illustrated by various numerical experiments

Topics: [MATH.MATH-NA]Mathematics [math]/Numerical Analysis [math.NA]
Publisher: 'Informa UK Limited'
Year: 2000
DOI identifier: 10.1080/12506559.2000.10511481
OAI identifier: oai:HAL:hal-00705115v1
Provided by: HAL-MINES ParisTech
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