Very-Rough-Wall Channel Flows: A DNS Study

被引：2
|
作者：
Castro, Ian P. [2 ]
Leonardi, Stefano [1 ]
机构：
[1] Univ Puerto Rico, Dept Mech Engn, San Juan, PR 00936 USA
[2] Univ Southampton, Sch Engn Sci, Southampton SO9 5NH, Hants, England
来源：
IUTAM SYMPOSIUM ON THE PHYSICS OF WALL-BOUNDED TURBULENT FLOWS ON ROUGH WALLS | 2010年 / 22卷
基金：
英国工程与自然科学研究理事会;
关键词：
MEAN FLOW; OBSTACLES; ARRAYS;
D O I：
10.1007/978-90-481-9631-9_24
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Highly resolved Direct Numerical Simulations (DNS) of channel flows over staggered arrays of wall mounted cubes are presented and discussed. Attention is concentrated on the spatially averaged mean velocity profiles and their implications for the log law. With an appropriate physically-based definition of the zero-plane displacement height, good log-law fits to the mean velocity profile can only be achieved if the von Karman 'constant', kappa, is allowed to vary with roughness morphology.
引用
收藏
页码：175 / +
页数：3
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