Two-Phase Flow Through Square and Circular MicroChannel- Effects of Channel Geometry

摘要

An adiabatic experiment was conducted to investigate the effect of channel geometry on gas-liquid two-phase flow characteristics in horizontal microchannels.A water-nitrogen gas mixture was pumped through a 96 mum square microchannel and the resulting flow pattern,void fraction and frictional pressure drop data were compared with those previously reported by the authors for a 100 mum circular microchannel.The pressure drop data were best estimated using a separated-flow model and the void fraction increased non-linearly with volumetric quality,regardless of the channel shape.However,the flow maps exhibited transition boundaries that were shifted depending on the channel shape.