Investigation on the mechanism of convective mass transfer from a horizontal rotating cylinder without air jet flow

Abstract

The local and mean convective mass transfer coefficients from the surface of a large-diameter horizontal circular rotating cylinder without air jet flow were investigated by measuring the concentration gradient. The results indicate that rotation performs different effects on the convective mass transfer at different regions. Based on the experimental data, the correlation equations of the mean convective mass transfer Sherwood number Sh and the critical Reynolds number Rer,cri have been formulated as follows: \( Sh = 0.32[(8.5Re_{\text{r}}^{2} + Gr) \cdot Sc]^{1/3} \) and \( Re_{\text{r,cri}} = 0.44(Gr \cdot Sc)^{1/2} \).