Fluid-structure interaction involving large deformations: 3D simulations and applications to biological systems

JOURNAL OF COMPUTATIONAL PHYSICS

卷:258

Article

Tian, Fang-Bao¹  Dai, Hu¹  Luo, Haoxiang¹  Doyle, James F.²  Rousseau, Bernard^3,4 

[1] Vanderbilt Univ, Dept Mech Engn, Nashville, TN 37235 USA

[2] Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA

[3] Vanderbilt Univ, Med Ctr, Dept Otolaryngol, Nashville, TN 37232 USA

[4] Vanderbilt Univ, Med Ctr, Dept Speech & Hearing Sci, Nashville, TN 37232 USA

关键词: Fluid-structure interaction;    Immersed-boundary method;    Finite-element method;    Large deformations;    Biological flows;    Insect flight;    Vocal fold;   

DOI  :  10.1016/j.jcp.2013.10.047

来源: Elsevier

【 摘 要 】

Three-dimensional fluid-structure interaction (FSI) involving large deformations of flexible bodies is common in biological systems, but accurate and efficient numerical approaches for modeling such systems are still scarce. In this work, we report a successful case of combining an existing immersed-boundary flow solver with a nonlinear finite-element solid-mechanics solver specifically for three-dimensional FSI simulations. This method represents a significant enhancement from the similar methods that are previously available. Based on the Cartesian grid, the viscous incompressible flow solver can handle boundaries of large displacements with simple mesh generation. The solid-mechanics solver has separate subroutines for analyzing general three-dimensional bodies and thin-walled structures composed of frames, membranes, and plates. Both geometric nonlinearity associated with large displacements and material nonlinearity associated with large strains are incorporated in the solver. The FSI is achieved through a strong coupling and partitioned approach. We perform several validation cases, and the results may be used to expand the currently limited database of FSI benchmark study. Finally, we demonstrate the versatility of the present method by applying it to the aerodynamics of elastic wings of insects and the flow-induced vocal fold vibration. (C) 2013 Elsevier Inc. All rights reserved.

【 授权许可】

Free