Abstract
ABSTRACT In this article, electrokinetic flow in rectangular microchannels is studied numerically with a finite-volume method. An externally applied electric field generates varying electromagnetic forces on the fluid, which can be manipulated to control heat exchange and fluid acceleration within the microchannel. Convective heat transfer is predicted on a staggered grid with a finite-volume formulation. The electromagnetic force is modeled as a linearized source term in a segregated solution of the axial momentum equation. Predictions of fluid velocity are compared successfully against past data. Constant wall temperature and constant wall heat flux cases are analyzed. The predicted results suggest that near-wall velocity and temperature gradients (constant wall temperature case) increase at larger Hartmann numbers, thereby leading to larger wall friction and convective heat transfer.
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