Heat transfer and Helmholtz-Smoluchowski velocity in Bingham fluid flow

doi:10.1007/s10483-020-2636-8

Abstract

Abstract: A mathematical study is developed for the electro-osmotic flow of a nonNewtonian fluid in a wavy microchannel in which a Bingham viscoplastic fluid model is considered. For electric potential distributions, a Poisson-Boltzmann equation is employed in the presence of an electrical double layer (EDL). The analytical solutions of dimensionless boundary value problems are obtained with the Debye-Huckel theory, the lubrication theory, and the long wavelength approximations. The effects of the Debyelength parameter, the plug flow width, the Helmholtz-Smoluchowski velocity, and the Joule heating on the normalized temperature, the velocity, the pressure gradient, the volumetric flow rate, and the Nusselt number for heat transfer are evaluated in detail using graphs. The analysis provides important findings regarding heat transfer in electroosmotic flows through a wavy microchannel.

Key words: electro-osmosis, Bingham viscoplastic fluid, electric double layer (EDL), heat transfer, Joule heating

2010 MSC Number:

35Q79
35Q30

A. SALEEM, M. N. KIANI, S. NADEEM, A. ISSAKHOV. Heat transfer and Helmholtz-Smoluchowski velocity in Bingham fluid flow. Applied Mathematics and Mechanics (English Edition), 2020, 41(8): 1167-1178.

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