Wall shear stress determination from near-wall mean velocity data in turbulent pipe and channel flows
Wall shear stress determination from near-wall mean velocity data in turbulent pipe and channel flows
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DOI：
10.1007/bf00189380
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发表时间：
1996-04-01
影响因子：
2.4
通讯作者：
Ye, Q
中科院分区：
文献类型：
--
作者：
Durst, F;Kikura, H;Ye, Q
提出了一种新的方法，该方法可以从充分发展的管流和槽流的近壁平均速度数据中准确地估计局部壁面剪应力。为了验证该方法的准确性，并提供了实验数据的可靠性要求；为了验证该方法的适用性，进行了湍流管流和槽道流动的近壁LDA测量。结果表明，壁面剪应力的估计精度在1%以内。给出了在不同雷诺数下，用壁面摩擦速度归一化得到的流向平均速度和湍流强度分布。
A novel method is proposed that allows accurate estimates of the local wall shear stress from near-wall mean velocity data in fully developed pipe and channel flows. DNS databases are used to demonstrate the accuracy of the method and to provide the reliability requirements on the experimental data.To demonstrate the applicability of the method, near-wall LDA measurements in turbulent pipe and channel flows were performed. The estimated wall shear stress is shown to be accurate to within 1%. Stream wise mean velocity and turbulence intensity profiles normalized with the wall friction velocity at several Reynolds numbers are presented.