Dissimilarity Between Heat and Momentum Tansfer in a Turbulent Boundary Layer Disturbed by a Cylinder

Abstract

An experimental study was performed to determine if the heating of a cylinder inserted to disturb a flat plate turbulent boundary layer can affect the dissimilarity between heat and momentum transfer reported previously for a case with an unheated cylinder. In the experiment, the cylinder was maintained at the same temperature as the wall surface. From the measurement of the wall heat transfer coefficient, the effect of the dissimilarity of the boundary conditions between velocity and temperature fields was found to be small. Simultaneous measurement of streamwise and normal components of velocity fluctuations and of temperature fluctuation was also made. Intensification of hot outward and cold wallward interactions due to the disturbance given by the cylinder were found to be a major cause of the dissimilarity between the heat and momentum transfer. © 1988, The Japan Society of Mechanical Engineers. All rights reserved.