Drag reduction in turbulent channel flow using bidirectional wavy Lorentz force

被引：0
|
作者：
HUANG LePing [1 ,2 ]
CHOI KwingSo [3 ]
FAN BaoChun [2 ]
CHEN YaoHui [2 ]
机构：
[1] Xi'an Aerospace Propulsion Institute
[2] Science and Technology on Transient Physics Laboratory,Nanjing University of Science & Technology
[3] Faculty of Engineering,University of Nottingham
来源：
Science China(Physics,Mechanics & Astronomy) | 2014年 / 11期
基金：
中国国家自然科学基金;
关键词：
turbulence control; direct numerical simulation; channel flow; Lorentz force; drag reduction;
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：
Turbulent control and drag reduction in a channel flow via a bidirectional traveling wave induced by spanwise oscillating Lorentz force have been investigated in the paper.The results based on the direct numerical simulation(DNS)indicate that the bidirectional wavy Lorentz force with appropriate control parameters can result in a regular decline of near-wall streaks and vortex structures with respect to the flow direction,leading to the effective suppression of turbulence generation and significant reduction in skin-friction drag.In addition,experiments are carried out in a water tunnel via electro-magnetic(EM)actuators designed to produce the bidirectional traveling wave excitation as described in calculations.As a result,the actual substantial drag reduction is realized successfully in these experiments.
引用
收藏
页码：2133 / 2140
页数：8
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