Numerical Simulation of Deflecting Flow in a Symmetric Enlarged Channel

• 作 者: HiroyukiYOSHIKAWA MizueMUNEKATA HidekiOHBA Kazuyoshi ICHINOMIYA
• 机 构: Department of Mechanical System Engineering,Kumamoto University,2-39-1 Kurokami,Kumamoto,860-8555 Ja
• 出 处: Journal of Thermal Science
• 发表日期: 2007年04期
• 关键词: dimensionality Reynolds downstream clarified details separated Stokes Navier wal

Numerical results of three-dimensional separated flow and heat transfer in a rectangular channel with a suddenexpansion are presented in this paper.Numerical simulations of Navier-Stokes and energy equations are carriedout using the finite difference method.The results of three-dimensional calculations are compared with thetwo-dimensional ones,and effects of the aspect ratio of channel upon the flow are shown.The transition fromsymmetric to asymmetric flow appears at lower Reynolds number as increasing the aspect ratio.The details oflocal heat transfer characteristics in two different separated flow regions on two downstream walls are clarified.Two-dimensionality of the flow and heat transfer almost disappears for the aspect ratio considered.

Numerical results of three-dimensional separated flow and heat transfer in a rectangular channel with a suddenexpansion are presented in this paper. Numerical simulations of Navier-Stokes and energy equations are carried out using the finite difference method. The results of three-dimensional calculations are with thetwo-dimensional ones, and effects of the aspect ratio of channel upon the flow are shown. The transition fromsymmetric to asymmetric flow appears at lower Reynolds number as increasing the aspect ratio. details of local heat transfer characteristics in two different separated flow regions on two downstream walls are clarified.Two-dimensionality of the flow and heat transfer almost disappears for the aspect ratio considered.