Modeling of dielectrophoretic particle motion: Point particle versus finite-sized particle.
Dielectrophoresis (DEP) is a very popular technique for microfluidic bio-particle manipulation. For the design of a DEP-based microfluidic device, simulation of the particle trajectory within the microchannel network is crucial. There are basically two approaches: (i) point-particle approach and (ii) finite-sized particle approach. In this study, many aspects of both approaches are discussed for the simulation of direct current DEP, alternating current DEP, and traveling-wave DEP applications. Point-particle approach is implemented using Lagrangian tracking method, and finite-sized particle is implemented using boundary element method. The comparison of the point-particle approach and finite-sized particle approach is presented for different DEP applications. Moreover, the effect of particle-particle interaction is explored by simulating the motion of closely packed multiple particles for the same applications, and anomalous-DEP, which is a result of particle-wall interaction at the close vicinity of electrode surface, is illustrated.
Microfluidics & Lab-on-a-chip Research Group, Mechanical Engineering Department, Bilkent University, Ankara, Turkey.
Barbaros
B
Çetin
Microfluidics & Lab-on-a-chip Research Group, Mechanical Engineering Department, Bilkent University, Ankara, Turkey.
S Doğan
SD
Öner
Department of Manufacturing Engineering, Atılım University, Ankara, Turkey.|Computational Science and Engineering Laboratory, Atılım University, Ankara, Turkey.
Besim
B
Baranoğlu
D003198:Computer Simulation; D004566:Electrodes; D004586:Electrophoresis / Q000379:methods*; D046210:Microfluidic Analytical Techniques / Q000379:methods*; D044085:Microfluidics / Q000379:methods*; D009038:Motion; D010316:Particle Size; D013499:Surface Properties
Boundary element method; Dielectrophoresis; Lagrangian tracking method; Microfluidics