Chun, MS Lee, TS Lee, K 2024-01-21T04:05:39Z 2024-01-21T04:05:39Z 2021-09-02 2005-12 1226-119X https://pubs.kist.re.kr/handle/201004/135970 We present a finite difference solution for electrokinetic flow in rectangular microchannels encompassing Navier's fluid slip phenomena. The externally applied body force originated from between the nonlinear Poisson-Boltzmann field around the channel wall and the flow-induced electric field is employed in the equation of motion. The basic principle of net current conservation is applied in the ion transport. The effects of the slip length and the long-range repulsion upon the velocity profile are examined in Conjunction with the friction factor. It is evident that the fluid slip counteracts the effect by the electric double layer and induces a larger flow rate. Particle streak imaging by fluorescent microscope and the data processing method developed Ourselves are applied to straight channel designed to allow for flow visualization of dilute latex colloids underlying the condition of simple fluid. The reliability of the velocity profile determined by the flow imaging is justified by comparing with the Finite difference solution. We recognized the behavior of fluid slip in velocity profiles at the hydrophobic Surface of polydimethylsiloxane wall, from which the slip length was evaluated for different conditions. English KOREAN SOC RHEOLOGY ELECTROKINETIC FLOW LIQUID MICROCHANNELS CAPILLARY PARTICLES MIGRATION SURFACES DEVICES Microflow of dilute colloidal suspension in narrow channel of microfluidic-chip under Newtonian fluid slip condition Article 1 KOREA-AUSTRALIA RHEOLOGY JOURNAL, v.17, no.4, pp.207 - 215 KOREA-AUSTRALIA RHEOLOGY JOURNAL 17 4 207 215 scie scopus kci other ART001155997 000234257500008 2-s2.0-29744452174 Mechanics Polymer Science Mechanics Polymer Science Article ELECTROKINETIC FLOW LIQUID MICROCHANNELS CAPILLARY PARTICLES MIGRATION SURFACES DEVICES microfluidic-chip colloidal suspension fluid slip electrokinetic flow particle streak polydimethylsiloxane channel