Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
655746 | International Journal of Heat and Fluid Flow | 2010 | 9 Pages |
Abstract
This study was conducted to clarify how two fluids with different temperature are mixed turbulently in a cross-flow type T-junction. The characteristics of the velocity and temperature fields in the channel were investigated experimentally, and the flow visualization was conducted to make clear the detailed behavior of the interface between two flows in the flow-merging region. We extracted the dominant structures of the velocity and concentration fields by proper orthogonal decomposition (POD). It is clarified that the interface of two flows is oscillating vertically and several discrete longitudinal eddies are superposed on it. We have concluded that the vertical oscillation of the interface is caused by the fluctuation of the streamwise velocity component, and the mushroom-like eddies are caused by the vertical fluctuating velocity; the former produces the turbulent heat flux in the streamwise direction, and the latter produces that in the vertical direction.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Masafumi Hirota, Eri Mohri, Hideo Asano, Hiroki Goto,