| 超疏水表面形貌对层流减阻的数值模拟 |
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| 引用本文： | 喻超,陈晓玲,孙蕾.超疏水表面形貌对层流减阻的数值模拟[J].上海交通大学学报,2012(2):312-316,322. |
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| 作者姓名： | 喻超 陈晓玲 孙蕾 |
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| 作者单位： | 上海交通大学动力机械及工程教育部重点实验室;联合利华中国研究所 |
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| 基金项目： | 国家自然科学基金资助项目(50606025);联合利华中国研究所资助项目 |
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| 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.
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| 关 键 词： | 超疏水表面 表面形貌 层流 流动减阻 数值模拟 |
Numerical Simulation of the Effects of Surface Morphologies on Drag Reduction of Superhydrophobic Surface in Laminar Flow |
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| YU Chao,CHEN Xiao-ling,SUN Lei.Numerical Simulation of the Effects of Surface Morphologies on Drag Reduction of Superhydrophobic Surface in Laminar Flow[J].Journal of Shanghai Jiaotong University,2012(2):312-316,322. |
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| Authors: | YU Chao CHEN Xiao-ling SUN Lei |
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| Institution: | 1.Key Laboratory for Power Machinery and Engineering of the Ministry of Education,Shanghai Jiaotong University,Shanghai 200240,China;2.Unilever Research China,Shanghai 200233,China) |
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| Abstract: | 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. |
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| Keywords: | superhydrophobic surface surface morphologies laminar flow drag reduction numerical |
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