Abstract
Local mass transfer and pressure coefficients on the side wall and the end surface of a finite circular cylinder have been measured. The experiments have been conducted under the condition of subcritical flow regime (Re∼104), 1/d=1∼6 and δ/d=0.1/1.0. The main results are summarized as follows. Slenderness parameter (1/d) and boundary layer thickness (δ/d) have a remarkable influence on the flow behavior and the local mass transfer distribution, especially on the end surface of the cylinder. Heat transfer coefficient on the end surface is higher than that of a two-dimensional cylinder, without distinction of the reattachment of a shear layer. Furthermore, Nusselt number of the side wall is smaller than that of a two-dimensional cylinder. And overall Nu on the finite circular cylinder is given in a simple correlation between parameter 1/d, δ/d and Re.
