Abstract
Fluid flow in the evaporating meniscus of an electrode‐gas‐electrolyte reacting system has been studied to examine the effect of viscous shear on the meniscus profile. The evaporating meniscus profile, the pressure derivative profile, and the curvature profile for various assumed evaporation profiles were calculated for . Due to the thinness of the meniscus profile in the interline region, large pressure gradients were needed to balance the viscous shear stress. The resulting evaporating meniscus profile was significantly different from the static profile. Depending on the evaporation rate the interline radius of curvature could be micron size for a large meniscus. Heat and mass transfer rates would also be significantly effected by these changes during an electrochemical reaction. Therefore, the effect of viscous shear should not be neglected in analyzing electrochemical processes in a “finite contact angle” meniscus.
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