An immersed-boundary method for flow-structure interaction in biological systems with application to phonation
Journal of Computational Physics
Bio-flow mechanics; Elasticity; Flow-induced vibration; Flow-structure interaction; Immersed-boundary method; Laryngeal flow; Phonation
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. © 2008 Elsevier Inc. All rights reserved.
Luo, H., Mittal, R., Zheng, X., Bielamowicz, S., Walsh, R., & Hahn, J. (2008). An immersed-boundary method for flow-structure interaction in biological systems with application to phonation. Journal of Computational Physics, 227 (22). http://dx.doi.org/10.1016/j.jcp.2008.05.001