Aerodynamics and heat transfer during coating of tablets in two‐dimensional spouted bed

The two-dimensional spouted bed has been pointed out in recent research works as an improved configuration of spouted beds. The main advantages in relation to the conventional spouted beds are the easy construction and scale-up. In this work we begin the study of coating of tablets in two-dimensional spouted beds. An experimental system was constructed and the data obtained were used to determine the values of maximum pressure drop, minimum spout flowrate and gas-to-particle heat transfer coefficient, for 36 process conditions. The experimental results have been correlated with process and geometrical parameters. Plus recemment les lits a jet bidimensionnetles ont ete aborde dans les travaux de recherches comme une nouvelle performance des lits a jet. Les principaux avantages de ce type de lits sont la facilite d'installation et l'extrapolation d'echelle. Dans ce travail nous avons etudie le pelliculage de pastilles dans un lit a jet bidimensionnel. Un systeme experimental a ete construit et nous avons determine la chute de pression maximale, le debit minimum de jet et le coefficent de transfert de chaleur ont ete determines pour les 36 experiences realisees. Les resultats experimentaux ont permis de proposer correlations a partir des parametres du procede et de la geometrie du lit.