和县二中>收付记账法Surface correlations of hydrodynamic drag for
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transitionally rough engineering surfaces 期刊名称： Journal of Turbulence
作者： Thakkar, Manan,Bus, Angela,Sandham, Neil
年份： 2016年
期号： 第2期鄂妃
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关键词： Roughness;direct numerical simulation;surface parameters;correlations
摘要：Rough surfaces are usually characterid by a single equivalent sand-grain roughness height scale that typically needs to be determined from laboratory experiments. Recently, this method has been complemented by a direct numerical simulation approach, whereby reprentative surfaces can be scanned and the roughness effects computed over a range of Reynolds number. This development rais the prospect over the coming years of having enough data for different types of rough surfaces to be able to relate surface characteristics to roughness effects, such as the roughness function that quspecifical
antifies the downward displacement of the logarithmic law of the wall. In the prent contribution, we u simulation data for 17 irregular surfaces at the same friction Reynolds number, for which they are in the transitionally rough regime. All
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