中文摘要：

为了研究超疏水表面形貌结构对其流动减阻的影响,设计了4种不同形貌的表面结构.针对超疏水表面的流动特点,建立微通道气-液两相流动的VOF（Volume of Fluid）模型,对超疏水表面在层流状态下的表面形貌结构对流动减阻的影响规律进行了研究.结果表明,超疏水表面的减阻效果随微凸起间距的增大而明显增大,而与微凸起高度的变化关系不大,且三角形和圆顶矩形微凸起结构表面比圆形和平顶矩形微凸起结构表面具有更好的减阻效果.

英文摘要：

In order to study the effects of surface morphologies on drag reduction of superhydrophobic surface,four different surface morphologies were designed.According to the flow characteristics on superhydrophobic surface,a VOF（Volume of Fluid） model of gas-liquid two-phase flow in microchannel was established and the impact of different surface morphologies on drag reduction in laminar flow was stimulated.The results show that the drag reduction increases significantly with the increase of the distance of micro-scale ridges,while does not vary significantly with the height of micro-scale ridges.And the drag reduction effect of the microchannel with triangular ridges or dome rectangular ridges is more apparent than those of microchannels with circular ridges or flat-topped rectangular ridges.