Investigation of Nonlinear Electrokinetic and Rheological Behaviors of Typical Non-Newtonian Biofluids through Annular Microchannels
Author(s):
Abstract:
Electroosmosis is the predominant mechanism for flow generation in lab-on-chip devices. Since most biofluids encountered in these devices reveal non-Newtonian behavior, a special understanding of the fundamental physics of the relevant transport phenomena seems vital for an accurate design of such miniaturized devices. In this study, a numerical analysis is presented to explore transport characteristics of typical non-Newtonian biofluids through annular microchannels under combined action of pressure and electrokinetic forces. The flow is considered steady and hydrodynamically fully developed. A finite difference method is used to solve the Poisson-Boltzmann and Cauchy momentum equations, while the classical boundary condition of no velocity-slip for the flow field is applied. The Poisson-Boltzmann equation is solved in the exact form without using the Debye-Hückel approximation. After numerically solving the governing equations, role of the key parameters in hydrodynamic behavior of the flow is analyzed and discussed.
Keywords:
Language:
English
Published:
Journal Of Applied Fluid Mechanics, Volume:9 Issue: 1, Jan-Feb 2016
Pages:
367 to 378
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