Liquid transport in rectangular microchannels by electroosmotic pumping |
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| Institution: | 1. ESIME Azcapotzalco, Instituto Politécnico Nacional, Av. de las Granjas No. 682, Col. Santa Catarina, Del. Azcapotzalco, México, D.F. 02250, Mexico;2. Departamento de Termofluidos, Facultad de Ingeniería, UNAM, México, D.F. 04510, Mexico;1. ESIME Azcapotzalco, Instituto Politécnico Nacional, Av. de las Granjas No. 682, Col. Santa Catarina, Del. Azcapotzalco, México, D.F. 02250, Mexico;2. Departamento de Termofluidos, Facultad de Ingeniería, UNAM, México, D.F. 04510, Mexico;1. Department of Mechanical Engineering, University of Kurdistan, Sanandaj 66177-15175, Iran;2. Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India |
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| Abstract: | The characteristics of electroosmotic flow in rectangular microchannels were investigated in this paper. A 2D Poisson–Boltzmann equation and the 2D momentum equation were used to model the electric double layer field and the flow field. The numerical solutions show significant influences of the channel cross-section geometry (i.e. the aspect ratio) on the velocity field and the volumetric flow rate. Also, the numerical simulation of the electroosmotic flow reveals how the velocity field and the volumetric flow rate depend on the ionic concentration, zeta potential, channel size and the applied electrical field strength. |
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