MODELLING OF FREEZING PROCESS FOR PANGASIUS FILLET ON IQF CONVEYOR

Abstract

Cooling and freezing of Pangasius is a terribly complex process of heat conduction with phase change, which includes many processes occuring simultaneously: heat and mass transfer, formation and development of solid phase of ice crystals which makes the phases frontier face moves continually, besides that the volume as well as the mechanical properties of food also vary. Especially, around the freezing point, there are large and sudden variations in thermophysical properties such as specific heat, density and thermal conductivity. Then, the differential equation describing the process of nonlinear partial one becomes extremely difficult to solve. In this paper, the finite element computation of unsteady phase change heat transfer during freezing of Pangasius had been applied to determine the accurate freezing
time.
Keywords: Freezing time, heat transfer, phase change, finite element, simulation.