Gozhenko L. The intensification of heat and mass transfer and hydrodynamic processes at the extraction of plant raw material using the method of discrete input pulse energy.

The dissertation is devoted to the scientific analysis of hydrodynamic and heat transfer processes in a pulsating apparatus for the development of a fundamentally new type of pulsating cavitation reactor, followed by its application for an intensification of the extraction process of target substances from plant raw material. The paper presents the results of research initiation of cavitation effects in the pulsating apparatus. Based on which the mathematical model describing the spatial and temporal characteristics of pulse propagation in vacuum and compression of the liquid path cavitation reactor, which provide periodic emergence and collapse of cavitation cluster. The model allows optimizing the operation of the apparatus depending on the type of plant raw materials. The mathematical model extraction kinetics are concerned, which is based on an algorithm developed by preliminary laboratory studies. It is grounded optimum conditions of extraction depending on the structure of plant material. The results of comparative experimental studies of the extraction of plant raw materials with different structures on the designed cavitation reactor type when compared with the existing impingement type of pulsation extractor are presented. It was found that the cavitation effects would intensify the extraction processes at the micro- and nano scale. Keywords: hydrodynamic processes, intensification, cavitation, the cavitation cluster, extraction, plant raw material, the mass transfer coefficient, the target substance.