Abstract: The gas-liquid two-phase flow behavior and mass transfer characteristics in microchannels are reviewed. The flow patterns in microchannels could be divided into bubbly flow，slug flow，annular flow and slug-annular flow，but no stratified flow，and the mass transfer efficiency increases by 2-3 orders of magnitude over that in conventional-sized devices. The formation，growth and coalescence of bubbles and their effect on gas-liquid two-phase flow in microchannels are also discussed. The progress of numerical simulation of gas-liquid two-phase flow in microchannels are introduced briefly. The research and application prospects of gas-liquid two-phase flow in microchannels are predicted from the aspects of experiment，theory and numerical simulation.

摘要： 综述了微通道内的气液两相流行为及传质特性。在微通道内流型一般分为泡状流、弹状流、环状流和弹 状－环状流，没有分层流。气液传质效率比常规尺度中的提高了2～3个数量级。讨论了气泡对气液两相流的影响及其生成、生长和聚并规律。介绍了微通道内气液两相流的计算机模拟结果。从实验、理论和数值模拟3个方面对微通道内气液两相流的研究和应用前景进行了展望。