Title: Mass transfer between particles and liquid in solid-liquid two-phase upflow in the low-velocity region through vertical tubes.
Abstract: tion problem in an annular fin with the shape of an arbitrary triangle can be easily obtained by using Eqs.( 2)-( 5).However, computation results are restricted to the relationship between the fin efficiency, 0, and the reduced Biot number1\ (W/dQ) V~Bi, for