Simulation of the dynamics of a flexible flagellum using the generalized lattice spring model and lattice Boltzmann method

• Main Author: 洪郁淳
• Other Authors: Rurng-Sheng Guo
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/63290811872303785130

碩士 === 國立高雄師範大學 === 物理學系 === 103 === In this study, a new simulation method which used to simulate the movement of a driven flagellum. The method uses the Generalized Lattice-Spring Model for the solid part, and the Immersed Boundary-Lattice Boltzmann Method for the fluid and the interaction between solid and fluid. In this thesis, the shape of the solid and the propulsive force of the solid have been plot and calculated. The drag coefficient of parallel and perpendicular in the free boundary and near wall are also presented and the results are compared with the theoretical study. The simulation results show that the results are roughly in agreement with the theoretical prediction. For the propulsive force of the solid, an optimal value in certain range is found and agrees with the theoretical prediction, difference between simulation and theoretical prediction still exist. At the end, the drag coefficient of parallel and perpendicular in the free boundary, the coefficients increase with the driving frequency is obtained; and the coefficients near wall increase as the distance decreased. Both of these have the same tendency of the theoretical. In the future, we hope more advanced techniques could be applied to speed up the computing speed to solve more complicated fluid-solid problems.