|제목(국문)||Opto-electrokinetic 효과에 의한 Toroidal Microvortex 형성에 관한 수치해석적 연구|
|제목(영문)||Numerical Simulation on the Formation of a Toroidal Microvoitex by the Opto-electrokinetic Effect|
,부산대학교 기계공학부 학부생
심재술 (Shim, JaeSool ,영남대학교 ) ▷공저자 네트워크 보기
김경천 (K.C. Kim ,영남대학교 기계공학부 ) ▷공저자네트워크등록하기
Abstract is not available for this article.
In this study, the formation of a toroidal microvortex by optoelectrokinetic effect was numerically simulated using COMSOL v4.2a multiphysics software. AC voltage was applied to the two parallel electrodes in a microchannel to generate temperature gradient in the fluids. In addition to the AC electrothermal (ACET) effect, local heating by a laser illumination was also considered. Numerical simulations were conducted for dielectric fluids. The toroidal microvortex induced by the optoelectrokinetic effect shows that two counter-rotating vortices are produced above the bottom electrodes. Fluid motions in the middle of bottom boundary are cancelled out by flows in opposite directions and consequently producing stagnation. It is expected that micro/nano particles are deposited in bottom electrode. Local heating enhanced the intensity of microvortex substantially due to the additional temperature gradient, it was confirmed that the ACET effect with laser illumination can be used for rapid concentration of micro/nano particles in the spot area.
|keyword||Toroidal Microvortex (도넛형 마이크로 와류)，Opto-electrokinetic effect (광전 효과)， Particle concentration (입자 응집), AC voltage (교류 전압), COMSOL Simulation (COMSOL 시뮬레이션)|
|저널명||대한기계학회 추계학술대회 ▷관련저널보기|