物理学报Issue(5)：054708-1-054708-9,9.DOI:10.7498/aps.63.054708
表面张力对疏水微结构表面减阻的影响
Drag reduction on micro-structured hydrophobic surfaces due to surface tension effect
摘要
Abstract
This article studies drag reduction rule and gas restoration and retention of hydrophobic surfaces numerically when taking into consideration the surface tension effect, the microstructure here is chessboard-like and the Reynolds number varies from 3,000 to 30,000. Results show that gas restoration and retention keep well, and a maximum drag reduction rate of approximately 30% has been gained at small Reynolds number(Re<15000). When Re is too large, water will swarm into microstructures, and keeping a good gas-liquid interface becomes difficult. Meanwhile, drag reduction rate remains variable and hydrophobic surfaces do not reduce drag. Through mechanical analysis we find that the influence of shear stress is weakened due to surface tension effect, thus the gas in microstructures can be effectively stored at low flow speed and drag is reduced.关键词
疏水表面/减阻/表面张力/多相流Key words
hydrophobic surfaces/drag reduction/surface tension/multiphase flow引用本文复制引用
宋保维,任峰,胡海豹,郭云鹤..表面张力对疏水微结构表面减阻的影响[J].物理学报,2014,(5):054708-1-054708-9,9.基金项目
国家自然科学基金(批准号:51109178)资助的课题@@@@Project supported by National Natural Science Foundation of China (Grant No.51109178) （批准号:51109178）
