TITLE:
An Overset Grid Method for Fluid-Structure Interaction
AUTHORS:
Scott T. Miller, R. L. Campbell, C. W. Elsworth, J. S. Pitt, D. A. Boger
KEYWORDS:
Overset Grid, Fluid-Structure Interaction, Arbitrary-Lagrangian Eulerian, Finite Volume, Finite Element, Moving Mesh, OpenFOAM
JOURNAL NAME:
World Journal of Mechanics,
Vol.4 No.7,
July
30,
2014
ABSTRACT: An
overset grid methodology is developed for the fully coupled analysis of
fluid-structure interaction (FSI) problems. The overset grid approach
alleviates some of the computational geometry difficulties traditionally
associated with Arbitrary-Lagrangian-Eulerian (ALE) based, moving mesh methods
for FSI. Our partitioned solution algorithm uses separate solvers for the fluid
(finite volume method) and the structure (finite element method), with mesh
motion computed only on a subset of component grids of our overset grid
assembly. Our results indicate a significant reduction in computational cost
for the mesh motion, and element quality is improved. Numerical studies of the
benchmark test demonstrate the benefits of our overset mesh method over
traditional approaches.