Comprehensive analysis of two-phase liquid-gas flow structures in varied channel geometries and thermal environments

Abstract

Two-phase liquid-gas flows are very often used in practice. It is a branch of knowledge that has been extensively studied for many years. The extensiveness of the topic results from the fact that two-phase flows differ quite significantly, depending on the geometry, hydraulic diameter orientation of the channel, and possible thermal processes occurring in the flow. These differences affect the formation of various flow structures and thus flow resistance and heat transfer if the flow is non-adiabatic. In addition to the impact on the energy consumption of the machines in which the phenomenon occurs, the flow structures affect the stability of the equipment operation. This article presents a literature review and knowledge analysis of flow structures in both adiabatic and non-adiabatic flows in channels of different dimensions, geometry, and orientation. The authors also present the results of their research in flow structures in the liquefaction process, carried out in minichannels, as well as a summary of knowledge in the field of liquid-gas flow structures.