REVEALING SPECIAL FEATURES OF HYDRODYNAMICS IN A ROTOR-DISK FILM VAPORIZING PLANT.

This paper reports the generalized results of computer simulation of physical processes at a rotor-disk film evaporating plant. Optimization of the operation mode cannot be achieved without establishing patterns in the course of physical processes. We have proposed a computer model of hydrodynamics that accounts for all the features, initial and boundary conditions. The results of computer simulations make it possible to adequately assess the effectiveness of using a rotor-disk film evaporating plant (RDFVP) for the concentration of heat-labile materials. We have established patterns in the course of physical processes within a structure of RDFVP by using computer simulation of hydrodynamics in the programming environment ANSYS and applying a k-ε turbulence model. The result of simulation is the derived velocity fields of the concentrated fluid (w_max=0.413 m/s) and the gas phase (w_max=8.176 m/s), as well as the magnitude of values for shear stress τ=0.94·10^-6 Pa. It was established that the gas heat-carrier is characterized by the highly-turbulent flows with maximum values for kinetic energy TKE_max=8.985·10^-1 m²/s². The reliability of results is ensured by the correctness, completeness, and adequacy of physical assumptions when stating the problem and while solving it using the computer aided design system ANSYS. It has been established that the proposed structure is an effective alternative to equipment for the concentration of solutions. The data obtained could be used when designing heat-and-mass-exchange equipment for the highly efficient dehydration of thermolabile materials. [ABSTRACT FROM AUTHOR]