Experimental study of local convective mass transfer from a circular cylinder in a turbulent uniform shear flow

Abstract

A naphthalene sublimation technique is used to investigate the mass transfer from a circular cylinder in a turbulent uniform shear flow. Experiments are performed in a wind tunnel with shear flow generator. The rate of shear and the mean flow Reynolds number are varied to study their effects on the mass transfer. It is found that the lacal mass transfer rate on a circular cylinder is characterized by the shear parameter $K_d$ defined as S.d/$U_c$, the angular position at which the Sherwood number is minimum is approximately proportional to $K_d$ in the range of the range of the present measurments $0<K_d<0.132$. The overall Sherwood number is nearly independent of $K_d$. However, it is strongly dependent on the centerline mean Reynolds number.