Evaluation of Heat and Mass Transfer Efficiency of Milk Spray Drying by Computational Simulation Tool

A spray drying model is simulated by the computational fluid dynamics (CFD). By changing the input conditions, the temperature and velocity fields in the drying chamber are examined and the volumetric heat transfer coefficient in each condition is calculated. It is obtained that the increase in the inlet air temperature and the air flow rate makes the decrease in the average volumetric heat transfer coefficient because of the increase in the energy loss; besides, particle residence time is shorter at the higher inlet air flow rate.