Yong Kweon Suh
Dong-A University
Korea
Title: Use of lattice boltzmann method to simulate interaction between fluid flow and particle motion in small scales
Biography
Biography: Yong Kweon Suh
Abstract
Numerical simulation of interaction between fluid flow and particle motion demands sophisticated algorithms due to the motion of particles and difficulty in creating the grid system. We developed during past decades numerical solution methods to tackle this problem and applied the methods to several branches of engineering applications of small scales. The method is based on the lattice Boltzmann method (LBM). In this talk, we demonstrate three kinds of numerical solutions provided by the methods. First, we developed the simulation code for the problem of translocation of a biopolymer through a nano–pore driven by an external electric field. A theoretical formula is also used to calculate the net electrophoretic force acting on the part of the polymer residing inside the pore. Next, we simulated the motion of microscopic artificial swimmer. The swimmer consists of an artificial filament composed of super–paramagnetic beads connected by elastic linkers and an externally oscillating magnetic field is used to actuate the filament, and we have found that there is an optimum sperm number at which the filament swims with maximum velocity. Then, we computed the fluid flow generated inside a micro channel by an array of beating elastic cilia. We have found that there exists a maximum flow rate at an optimum sperm number. We also simulated the motion of particles caused by fluid flow of cilia actuation.
