Title :
The numerical simulation of superhydrophobic surface´s flow field characteristic
Author :
Huang Qiaogao ; Pan Guang ; Hu Haibao ; Song Baowei
Author_Institution :
Coll. of Marine Eng., Northwestern Polytech. Univ., Xi´an, China
Abstract :
Based on the flow field mathematical model of superhydrophobic surfaces, the numerical simulation of superhydrophobic surfaces with microcosmic topography in turbulence was carried out. The flow field characteristics of superhydrophobic surfaces were analyzed from the flow field structure, the shear stress distribution, the velocity distribution of gas-liquid interface and the turbulent kinetic energy distribution. The results show that the superhydrophobic surfaces´ microcosmic topography has a significant effect on the near-wall flow field, the shear stress of gas-liquid interface is almost zero, the apparent slip flow appears and the turbulent fluctuation is largely suppressed, which is perhaps the inner drag reduction mechanism of superhydrophobic surfaces.
Keywords :
boundary layer turbulence; drag reduction; flow simulation; fluctuations; hydrophobicity; numerical analysis; shear turbulence; two-phase flow; drag reduction mechanism; flow field mathematical model; gas-liquid interface; microcosmic topography; near-wall flow field; numerical simulation; shear stress distribution; slip flow; superhydrophobic surface flow field characteristic; turbulent fluctuation; turbulent kinetic energy distribution; velocity distribution; Educational institutions; Equations; Kinetic energy; Mathematical model; Stress; Surface topography; drag reduction; flow field characteristic; microcosmic topography; superhydrophobic surfaces;
Conference_Titel :
Fuzzy Systems and Knowledge Discovery (FSKD), 2012 9th International Conference on
Conference_Location :
Sichuan
Print_ISBN :
978-1-4673-0025-4
DOI :
10.1109/FSKD.2012.6234004