论文部分内容阅读
The paper Presents an analysis of two-dimensional zero pressure gradient (ZPG) turbulent boundary layers (TBL) with regard to the application of Power laws. Only TBL with low Reynolds number 300 < Reδ2 < 6200 are taken into account. It is found that a certain region of the mean velocity profile can be described with a power law of the form u+ = Cpow * y+α This Power law region is not a Priori identical with the overlap region. An algorithm for the determination of the wall skin friction using the power law is proposed. The method was applied with good result to ZPG TBL and to adverse pressure gradient (APG) TBL. To bridge the gap between the wall and the power law region an approach for the turbulent viscosity is suggested.
The paper Presents an analysis of two-dimensional zero pressure gradient (ZPG) turbulent boundary layers (TBL) with regard to the application of Power laws. Only TBL with low Reynolds number 300
其他文献
简述了数值天气预报问题中非线性发展方程的非线性计算不稳定性的含义、数值计算现象以及计算不稳定产生的机理 ,给出了克服非线性计算不稳定的一个有效方法——平方守恒格式
常言道:远亲不如近邻。然而,在现实生活中,有些近邻往往因一点小事争强斗胜,缺乏理智和谦让,使小纠纷酿成了大悲剧。 一盅酒,陪客人成了阴间鬼 王廷中到女儿家走亲戚,女儿、
本文首次报告从三七绒根中分得三七皂甙-C_3、-D_2、-D_3及-E_2。经部分水解、酸水解,元素分析、13C核质共振谱及乙酰化物的质谱研究,分别鉴定为20—(S)人参皂甙—Rg_3,此系
灯盏花,又名灯盏细辛,为菊科短亭飞蓬[Erigeron breviscapus (Vant.)Hand-Mazz.]的全草,云南民间认为具有散寒解表、止痛舒络、活血治瘫之功效。临庆试用说明灯盏花素为有效
甜菊叶为近年来我国有发展前途的并在医药用途方面很广泛,是治疗糖尿病、高血压、心脏病、肥胖症和予防龋齿等有特殊的医药用途而且疗效显著的良药。也是糖尿病患者的专用食
一项具有国内领先、世界先进水平的纳米级超细粉生产线已建成投产,它的投产意味着我国纳米级碳化物、氮化物的超细粉材料已经进入产业化、商品化。该项目是由石家庄依斯特专
茶皂甙是从茶籽饼里提取的一种五环三萜皂甙。它具有抗炎症渗出和皮肤真菌感染作用。试管内药液二倍稀释法测得茶皂甙最低抑菌浓度;红色癣菌125r/ml,断发癣菌500r/ml,白色念
There are five animals here.Please choose(选)your favorite one.结果解释:(背叛)你一直很理解他人,你不会背叛你的朋友。B.People trust you.You are kind to everyone.P