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벽 근처에서 자유 낙하하는 입자의 마이크로 유체 관점 수치해석
김정목(Joeng Mok Kim),백성열(Seong Yeol Bak),박중열(Joong Yull Park) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
Cell-size particle in microfluidics seems to move slower near wall, even in static fluid. The cell has very small volume compared to channel or well. Usually, the cell itself does not affect the flow of channel, due to its size and density. But in this paper, we have regarded the cell as sphere that has volume, momentum and torque, by using Macroscopic Particle Model (MPM) to consider the wall-effect of free-falling particle. To validate the result, 200~300 μm glass bead was used for both simulation and experiment. Simulation shows that the cell dropped near wall was slowed down to 23.5% comparing to free-fall without wall-effect. While experiment data does not match well with simulation, the same tendency of slower falling velocity near wall was observed. Also, the particles dropped near wall tends to move to center of channel, which would help forming the spheroid or inspecting the collision activities of cells.
벽 근처에서 자유 낙하하는 입자의 마이크로 유체 관점 수치해석
김정목(Joeng Mok Kim),백성열(Seong Yeol Bak),박중열(Joong Yull Park) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
Cell-size particle in microfluidics seems to move slower near wall, even in static fluid. The cell has very small volume compared to channel or well. Usually, the cell itself does not affect the flow of channel, due to its size and density. But in this paper, we have regarded the cell as sphere that has volume, momentum and torque, by using Macroscopic Particle Model (MPM) to consider the wall-effect of free-falling particle. To validate the result, 200~300 μm glass bead was used for both simulation and experiment. Simulation shows that the cell dropped near wall was slowed down to 23.5% comparing to free-fall without wall-effect. While experiment data does not match well with simulation, the same tendency of slower falling velocity near wall was observed. Also, the particles dropped near wall tends to move to center of channel, which would help forming the spheroid or inspecting the collision activities of cells.