Intensification of the Foam Technology by the Energy of Electrohydrothermal Force Fields. Part 3. Investigation of the Processes of Heat and Mass Transfer in a Foam System under the Action of EHTFF

Abstract

As a result of thermal expansion of the gas phase of a foam mass playing the role of compacting component in a closed volume, we observe the appearance of excess internal pressure accompanied by the formation of the fields of pressure, temperature, and moisture content. The partial flows of liquid caused by these fields are directed from the center toward the perforated walls of the form and go further leaving the form. Under the action of electrohydrothermal force fields, we observe the appearance of three partial flows of moisture combined into a single flow in the mass. Thus, the phenomenon of self-compaction is accompanied by the processes of heat and mass transfer. At low temperatures, moisture moves in the material in the form of a fluid. At the same time, at high temperatures, it has the form of vapor. The density of the total flow of moisture can be represented as the sum of densities of the partial flows. The analytic investigation of the mechanism of heat-and-mass transfer flows enables us to study the behavior of the foam mass in the course of heat-and-force treatment and to choose the best conditions for this treatment.