title: An immersed-boundary method for flow-structure interaction in biological systems with application to phonation.
abstract: 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.
authors: Department of Mechanical Engineering, Vanderbilt University, 2301 Vanderbilt Pl., Nashville, TN 37235-1592.
authors: Haoxiang
authors: H
authors: Luo
authors: Rajat
authors: R
authors: Mittal
authors: Xudong
authors: X
authors: Zheng
authors: Steven A
authors: SA
authors: Bielamowicz
authors: Raymond J
authors: RJ
authors: Walsh
authors: James K
authors: JK
authors: Hahn