Vertical rotation effect on turbulence characteristics in an open channel flow

被引：0

作者：

邹立勇 ^{[1
]}

柏劲松 ^{[1
]}

李步阳 ^{[2
]}

谭多望 ^{[1
]}

李平 ^{[1
]}

刘仓理 ^{[1
]}

机构：

[1] Laboratory for Shock Wave and Detonation Physics Research,Institute of Fluid Physics,China Academy of Engineering Physics

[2] General Electric Hydro Equipment Asia Co.Ltd.

来源：

Chinese Physics B | 2008年 / 03期

基金：

中国国家自然科学基金;

关键词：

vertical rotating open channel flow; turbulence statistics; flow structure;

D O I：

暂无

中图分类号：

O357.5 [湍流（紊流）];

学科分类号：

080103 ; 080704 ;

摘要：

This paper solves the three-dimensional Navier-Stokes equation by a fractional-step method with the Reynolds number Re τ =194 and the rotation number N τ =0-0.12.When N τ is less than 0.06,the turbulence statistics relevant to the spanwise velocity fluctuation are enhanced,but other statistics are suppressed.When N τ is larger than 0.06,all the turbulence statistics decrease significantly.Reynolds stress budgets elucidate that turbulence kinetic energy in the vertical direction is transferred into the streamwise and spanwise directions.The flow structures exhibit that the bursting processes near the bottom wall are ejected toward the free surface.Evident change of near-surface streak structures of the velocity fluctuations are revealed.

引用

页码：1034 / 1040

页数：7