Simultaneous heat and mass transfer in a fluidized bed of drying silica gel

TLDR: In this article, the authors derived the partial coefficients of heat and mass transfer in air from and to a drying fluidized mass of silica gel, by an inspection of the relation between the two coefficients.

Abstract: The determination of the partial coefficients of heat and mass transfer in air from and to a drying fluidized mass of silica gel is given. The analogy between the two methods of transport in the bed has been studied by an inspection of the relation between the two coefficients. A correlation of these coefficients with the void fraction, the superficial velocity, the particle size and the tube diameter of the bed has been derived. This correlation has been transformed into a correlation of dimensionless groups. On determine les coefficients partiels de transfert de chaleur et de transfert de masse entre l'air et une masse fluidifiee de gel de silice, pour des echanges dans les deux sens. Les auteurs etudient l'analogie entre les modes de transfert dans le lit par inspection de la relation entre les deux coefficients. On a deduit une correlation entre ces coefficients et la porosite, la vitesse superficielle, les dimensions des particules et le diametre du tube. On a transforme cette correlation et une expression a groupes sans dimensions.