Turbulent transition in plane Couette flows
The energy gradient theory has been proposed in our previous work with the aim to better understand the mechanism of flow transition from laminar flow to turbulent flow. In this theory, the flow instability is characterized by a function K (defined as ratio of transversal energy gradient to streamwise rate of energy loss) and the disturbance amplitude. In this paper, using the energy analysis, the equation for calculating K in plane Couette flow is derived. It is demonstrated that the critical value of K at the condition of flow transition which is observed from experiments is about 370 for plane Couette flow. This value is about the same as for plane Poiseuille flow and pipe Poiseuille flow (385-389).
Flow instability Transition Plane Couette flow Energy gradient Energy loss Critical condition
H.S.Dou B.C.Khoo K.S.Yeo
Temasek Laboratories, National University of Singapore, Singapore 117508 Department of Mechanical Engineering, National University of Singapore, Singapore 119260
国际会议
The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)
上海
英文
2007-08-15（万方平台首次上网日期，不代表论文的发表时间）