Multiscale processes of the flow and non-equilibrium interphase heat and mass transfer self-organization in multiphase systems

Vladimir V Kuznetsov,S.V Alekseenko

doi:10.1051/matecconf/201711501002

Abstract

Multiscale processes of self-organization of the flow and non-equilibrium heat and mass transfer during the separation of a binary mixture in a multiphase system formed by a structural packing and a counter-flow vapor-liquid flow are considered. The conditions for the appearance of large-scale convective flow during separation of the binary mixture of refrigerants R21-R114 in a distillation column with Koch 1Y structure packing are obtained. The physical properties of this mixture are similar to the properties of air component at cryogenic temperatures.

Highlights

One of the main problems hindering the development of high-efficiency multiphase heat and mass transfer equipment with unique characteristics on the specific surface and the intensity of heat and mass transfer processes is the multiscale flow, caused by the interaction of processes at the micro- and macrolevel
Let us consider the counter-current flow of liquid and vapor in the distillation column filled with structure packing during binary gas mixture separation
The reduction of gas density is conditioned by the transition of the volatile distillate fraction from the liquid to vapor due to the mass transfer process

Summary

Introduction

One of the main problems hindering the development of high-efficiency multiphase heat and mass transfer equipment with unique characteristics on the specific surface and the intensity of heat and mass transfer processes is the multiscale flow, caused by the interaction of processes at the micro- and macrolevel. The physical processes in complex channel systems are studied, as well as methods for calculating the efficiency of binary mixture separation for the packing of various types, developed in [3]. The occurrence of large-scale unevenness in the flow and fraction concentration for the liquid and gas causes the deterioration in the separation efficiency [4, 5].

Results

Conclusion