Convective mass transfer from a horizontal rotating large-diameter cylinder

The local and average convective mass transfer coefficients from the porous medium surface of a horizontal rotating large-diameter cylinder were measured at a constant mass transfer state. Characteristics of local and average Sherwood numbers varying with rotational Reynolds numbers were investigated. Further, the critical Reynolds number (Rer,cri) was determined and analyzed. Based on the experimental results, equations correlating the average Sherwood number (Sh) and critical Reynolds number (Rer,cri) with the rotational Reynolds number (Rer), Schmidt number (Sc) and Grashof number (Gr) have been obtained, respectively.