Experimental and theoretical investigations on the flow resistance reduction and slip flow in super-hydrophobic micro tubes
Experimental and theoretical investigations on the flow resistance reduction and slip flow in super-hydrophobic micro tubes
复制标题
超疏水微管流阻降低和滑流的实验和理论研究
DOI：
10.1016/j.expthermflusci.2015.08.003
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发表时间：
2015-12
影响因子：
3.2
通讯作者：
Ding, Ning
中科院分区：
文献类型：
--
作者：
Liu, Zhigang;Jiang, Guilin;Zhang, Chengwu;Ding, Ning
Super-hydrophobic micro tubes with contact angles larger than 150° on inner walls are obtained by solidifying a hydrophobic solution prepared by adding 2% perfluorinated octyl fluorine silane and other additives to modified silicone dilute solution, and diameters of micro tubes are 0.447 mm, 0.728 mm and 0.873 mm, respectively. The changing coefficients of the pressure drops and friction factors in micro tubes due to the super-hydrophobic processing are experimentally measured with Reynolds number ranging from 0 to 2500. A theoretical method is employed to obtain the theoretical correlations of the slip length and velocity in super-hydrophobic micro tubes, so the relationships between the flow resistance reduction and slip flow are quantitatively analyzed. The results illustrate that the changing coefficient of the pressure drop and the friction factor reaches over 60% due to super-hydrophobic surfaces, but the reduction of the pressure drop decreases gradually with the increase ofReand the decrease of tube diameter. The theoretical predictions to changing coefficients of pressure drops and friction factors are consistent with the experimental results. Moreover, the reduction rate of slip length and slip velocity with the increase of pressure andReis the dominant factor to decide the total resistance reduction in super-hydrophobic micro tubes.
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影响因子：
3.9
作者：
Patankar, NA
通讯作者：
Patankar, NA
DOI：
10.1007/978-3-642-29390-0_76
发表时间：
2012
期刊：
--
影响因子：
--
作者：
Y. Wu;S. Gao
通讯作者：
Y. Wu;S. Gao
影响因子：
3.2
作者：
MOFFAT, RJ
通讯作者：
MOFFAT, RJ
影响因子：
9.2
作者：
Cai, Y. H.;Hu, J.;Zhang, H. M.
通讯作者：
Zhang, H. M.
影响因子：
4.6
作者：
Choi, CH;Westin, KJA;Breuer, KS
通讯作者：
Breuer, KS