HEAT AND MASS TRANSFER IN PHASE TRANSFORMATIONS EXPERIMENTAL INVESTIGATION OF THE DYNAMICS OF THE PHASE TRANSITION BOUNDARY IN THE MOTION OF A HEATED NON-NEWTONIAN FLUID IN A CHANNEL

摘要

The process of growth of the boundary crystallized phase in the motion of a heated non-Newtonian fluid in a channel with a cold wall has been studied experimentally. As the fluid, polypropylene with pseudoplastic properties was used. Experimental curves of the growth of the wall crystallized phase as a function of time were obtained for different values of the initial fluid melt temperature. The experimental value of the Nusselt number at the solid-liquid interface has been computed.