Heinrich, StefanStefanHeinrichMörl, LotharLotharMörl2022-12-062022-12-061999International Journal of Thermal Sciences 38 (2): 142-147 (1999)http://hdl.handle.net/11420/14303This work presents physically based mathematical mass- and heat transfer models for processes of granulation, agglomeration and coating in fluidised beds. Starting from mass and energy balances, the models describe the influences of local liquid input, non-ideal solid and liquid mixing, heat transport by the solids, and a place-dependent degree of wetness. A coefficient for the heat or mass transfer solid-liquid film, solid-gas and gas-liquid films was defined. The place-dependent functions of gas and solid temperatures, gas humidity, gas enthalpy, liquid concentration, as well as the degree-of-wetness, are presented. The main conclusions of the model are the existence of an active zone in the liquid feed and, furthermore, of a central region in the fluidised bed, characterised by constant gas temperatures.en1290-072919992142147DryingEvaporationFluidised bedHeat and mass transferSprayingIngenieurwissenschaftenJournal Article10.1016/S1290-0729(99)80051-9Other