物理学报Issue(5)：054701-1-054701-7,7.DOI:10.7498/aps.63.054701
疏水表面滑移流动及减阻特性的格子Boltzmann方法模拟
Lattice Boltzmann simulation of slip flow and drag reduction characteristics of hydrophobic surfaces
摘要
Abstract
The relationship between the surface wettability and the interaction strength of liquid-wall particles is first in-vestigated using a lattice Boltzmann method, and then the liquid flow over hydrophobic surfaces is simulated in a microchannel. Effect of surface wettability on the slip flow and drag reduction characteristics of hydrophobic surfaces is obtained. Existence of the apparent slip on hydrophobic surfaces is confirmed and its mechanism is revealed. Simulation results show that the hydrophobicity induces a low density layer near the wall of hydrophobic surfaces and the apparent slip is observed on the low density layer. It is shown that the apparent slip is a direct cause of hydrophobic surfaces’ drag reduction effect. Thus the drag reduction effect increases with increasing slip length. For a specific fluid system, the slip length is an inherent property of the hydrophobic surfaces and is a single function of the surface wettability. The slip length does not change with the external flow property.关键词
疏水表面/滑移流动/减阻机理/格子Boltzmann方法Key words
hydrophobic surface/slip flow/drag reduction mechanism/lattice Boltzmann method引用本文复制引用
黄桥高,潘光,宋保维..疏水表面滑移流动及减阻特性的格子Boltzmann方法模拟[J].物理学报,2014,(5):054701-1-054701-7,7.基金项目
国家自然科学基金(批准号:51279165,51109178)资助的课题@@@@Project supported by the National Natural Science Foundation of China (Grant Nos.51279165,51109178) （批准号:51279165,51109178）
