Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/122345
Title: COMPUTATIONAL MODELING OF A MICRO-SWIMMER : FLUID-STRUCTURE INTERACTION
Authors: QUEK YEONG LOONG, RAYMOND
Keywords: Cilia, immersed boundary, metachronal, computational fluid dynamics, mucus
Issue Date: 29-Jul-2015
Citation: QUEK YEONG LOONG, RAYMOND (2015-07-29). COMPUTATIONAL MODELING OF A MICRO-SWIMMER : FLUID-STRUCTURE INTERACTION. ScholarBank@NUS Repository.
Abstract: We present a simplified computational model of a cilia array that can spontaneously produce metachronal waves. Our cilia array mimics the cilia on multi-ciliated micro-swimmers such as Paramecium and Opalina. Each individual cilium is modeled as a 1-dimensional elastic structure immersed in Newtonian fluid. We systematically study the effects of cilia number density and stiffness on metachronal wave patterns and fluid transport along the cilia array. We show the existence of an optimal cilia number density giving rise to maximum fluid velocity at the cilia tips. Next we progress to a stratified two-fluid configuration. This configuration corresponds to physiological conditions in our respiratory system, where cilia reside in a periciliary layer (PCL) below a mucus layer. Our model treats the mucus as a viscous Newtonian fluid. Our model shows that the presence of surface tension between the PCL and mucus layer drastically modifies the vortices produced by cilia motion.
URI: http://scholarbank.nus.edu.sg/handle/10635/122345
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