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Journal of Applied Mechanics and Technical Physics

2015 year, number 5

EXPERIMENTAL STUDY OF HEAT TRANSFER DUE TO INTERACTION OF TWO SEPARATED FLOWS OF DIFFERENT SCALES

V. I. Terekhov, I. Ya. Smul'skii
Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
terekhov@itp.nsc.ru
Keywords: турбулентный поток, отрывное течение, обратный уступ, теплообмен, turbulent flow, separated flow, backward-facing step, heat transfer

Abstract

This paper describes an experimental study of heat transfer in a channel behind a backward-facing step in the presence of a disturbance in front of it in the form of a single rib in the range of the Reynolds numbers $\Re = 5000\mbox--15\,000$. The influence of the rib position and height on heat transfer intensity behind the backward-facing step is investigated. It is shown that reattachment of the flow disturbed by the obstacle intensifies the heat transfer on the surface behind the backward-facing step.