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Computing Fluid-Structure Interaction by the Partitioned Approach with Direct Forcing

Published online by Cambridge University Press:  05 December 2016

Asim Timalsina*
Affiliation:
Department of Mathematics and Statistics, Old Dominion University, Norfolk, VA 23529, USA
Gene Hou*
Affiliation:
Department of Mechanical and Aerospace Engineering, Old Dominion University, Norfolk, VA 23529, USA
Jin Wang*
Affiliation:
Department of Mathematics, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA
*
*Corresponding author. Email addresses:atimalsi@odu.edu (A. Timalsina), ghou@odu.edu (G. Hou), Jin-Wang02@utc.edu (J.Wang)
*Corresponding author. Email addresses:atimalsi@odu.edu (A. Timalsina), ghou@odu.edu (G. Hou), Jin-Wang02@utc.edu (J.Wang)
*Corresponding author. Email addresses:atimalsi@odu.edu (A. Timalsina), ghou@odu.edu (G. Hou), Jin-Wang02@utc.edu (J.Wang)
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Abstract

In this paper, we propose a new partitioned approach to compute fluid-structure interaction (FSI) by extending the original direct-forcing technique and integrating it with the immersed boundary method. The fluid and structural equations are calculated separately via their respective disciplinary algorithms, with the fluid motion solved by the immersed boundary method on a uniform Cartesian mesh and the structural motion solved by a finite element method, and their solution data only communicate at the fluid-structure interface. This computational framework is capable of handling FSI problems with sophisticated structures described by detailed constitutive laws. The proposed methods are thoroughly tested through numerical simulations involving viscous fluid flow interacting with rigid, elastic solid, and elastic thin-walled structures.

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Type
Research Article
Copyright
Copyright © Global-Science Press 2016 

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