An immersed-boundary method for flow-structure interaction in biological systems with application to phonation

作者：Luo Haoxiang; Mittal Rajat^*; Zheng Xudong; Bielamowicz Steven A; Walsh Raymond J; Hahn James K

来源：Journal of Computational Physics, 2008, 227(22): 9303-9332.

DOI：10.1016/j.jcp.2008.05.001

• Immersed-boundary method
• Elasticity
• Flow-structure interaction
• Bio-flow mechanics
• Phonation
• Laryngeal flow
• Flow-induced vibration

A new numerical approach for modeling a class of flow-structure interaction problems typically encountered in biological systems is presented. In this approach, a previously developed, sharp-interface, immersed-boundary method for incompressible flows is used to model the fluid flow and a new, sharp-interface Cartesian grid, immersed-boundary method is devised to solve the equations of linear viscoelasticity that governs the solid. The two solvers are Coupled to model flow-structure interaction. This coupled solver has the advantage of simple grid generation and efficient computation on simple, single-block structured grids. The accuracy of the solid-mechanics solver is examined by applying it to a canonical problem. The solution methodology is then applied to the problem of laryngeal aerodynamics and vocal fold vibration during human phonation. This includes a three-dimensional eigen analysis for a multi-layered vocal fold prototype as well as two-dimensional, flow-induced vocal fold vibration in a modeled larynx, Several salient features of the aerodynamics as well as vocal fold dynamics are presented.

• 出版日期2008-11-20