This study aims to investigate the entropy generation of mixed electroosmotic and pressure driven flow in a microchannel with high zeta potential. The combined effects of viscous dissipation and Joule heating on the entropy generation are examined. Without the often-used linear Debye-Hückel approximation, a solution of the full Poisson-Boltzmann equation was adopted to represent the EDL potential distribution. The total entropy generation rate for the present problem arises because of three different factors, i.e., the heat transfer, Joule heating, and viscous dissipation. Effects of major parameters on the entropy generation rates are illustrated and discussed.

microchannel, electroosmosis, entropy generation

Received: April 5, 2025; Accepted: May 20, 2025; Published: June 9, 2025

How to cite this article: Chien-Hsin Chen, Entropy generation in electroosmotic flow at high zeta potential, JP Journal of Heat and Mass Transfer 38(3) (2025), 485-495. https://doi.org/10.17654/0973576325024

This Open Access Article is Licensed under Creative Commons Attribution 4.0 International License

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