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Turbulence Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence Heat and Mass Transfer
September, 14-18, 2009, Rome, Italy

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf


ISBN Print: 978-1-56700-262-1

ISSN: 2377-2816

Experimental study on turbulent mixing process in cross-flow type T-junction

page 11
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.2120
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ABSTRAKT

This study has been conducted to clarify how two fluids with different temperature are mixed turbulently in a cross-flow type T-junction. The velocity field in the channel is investigated by PIV, and the flow visualization is conducted to make clear the behavior of the interface between two flows in the flow-merging region. We extracted the dominant structures of the velocity and concentration fields by POD. It is clarified that the interface of two flows is oscillating vertically and several 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 streamwise turbulent heat flux, and the latter produces the vertical one.

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