A study of the effect of heat flux density on the pressure drop of two-phase gas-liquid flows in a slotted microchannel
Yu. A. Dementyev, E. A. Chinnov
S.S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Keywords: microchannel, two-phase flow, pressure drop, evaporation
Abstract
An experimental study was conducted to examine the effect of heat flux density on the pressure drop of two-phase gas-liquid flows in a flat microchannel with local heating at a fixed liquid mass velocity and varying gas mass velocities. It was shown that at low gas mass velocities, the pressure drop increases due to enhanced interphase interaction; at high gas mass velocities, it decreases due to intense evaporation, wall drying, and reduced liquid-wall friction; and at moderate gas mass velocities, it remains virtually unchanged due to the competition between the two mechanisms.
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