A theoretical prediction of friction drag reduction in turbulent flow by superhydrophobic surfaces
A theoretical prediction of friction drag reduction in turbulent flow by superhydrophobic surfaces
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DOI：
10.1063/1.2205307
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发表时间：
2006-05-01
影响因子：
4.6
通讯作者：
Koumoutsakos, P
中科院分区：
文献类型：
--
作者：
Fukagata, K;Kasagi, N;Koumoutsakos, P
我们提出了一个理论预测的减阻率实现超疏水表面在湍流通道流。预测的减阻率是在良好的协议，从直接数值模拟的结果在Re τ类似或等于180和400。本理论表明，通过采用疏水性表面，在实际感兴趣的雷诺数（Re-tau类似于10（5）-10（6））下也可以大幅减阻，这会导致大约十个壁单位或更多的滑动长度。(C)2006年，美国物理学会。
We present a theoretical prediction for the drag reduction rate achieved by superhydrophobic surfaces in a turbulent channel flow. The predicted drag reduction rate is in good agreement with results obtained from direct numerical simulations at Re-tau similar or equal to 180 and 400. The present theory suggests that large drag reduction is possible also at Reynolds numbers of practical interest (Re-tau similar to 10(5)-10(6)) by employing a hydrophobic surface, which induces a slip length on the order of ten wall units or more. (C) 2006 American Institute of Physics.