Yovchenko A. Thermal effects and hydrodynamics in the core of a rotary hydrodynamic emulsifier

The dissertation is devoted to the research of thermal effects and hydrodynamics in the core of rotary hydrodynamic homogenizers used for obtaining phase-changing suspensions. The dissertation considers thermal and hydrodynamic processes in rotary hydrodynamic homogenizers in the treatment of liquids of different viscosities: distilled water, glycerin, industrial oil. Based on the temperature distribution in the inter-cylinder gap of the rotary hydrodynamic homogenizer, the value of the parameter that affects the change in the direction of heat flow in the gap during high-gradient motion of the viscous fluid is determined. Taking into account the turbulent viscosity, the dissipation coefficient and the weighted average value of the dissipation of the mechanical energy of an incompressible viscous fluid in smooth and rough round cylindrical pipes based on the model of Yu.V. Lapina, O.A. Nekhamkina, M.Kh. Strelets with a damping van Drist multiplier and in the flow between two cylinders with smooth and rough walls according to the Clauser formula. A method for the process of obtaining stable phase-change suspensions has been developed. To obtain a fluid phase-change suspension, the concentration of phase-change material should not exceed 25%. The maximum surfactant concentration  5%. The required concentration of crystallization nuclei, which use graphite, should not exceed 0,05-0,07%. The dependence of the change in the enthalpy of the phase-change suspension (heat of accumulation) on the concentration of PСM and the temperature difference is obtained. The basic scheme of application of РСS as the heat carrier in systems of solar heat supply is offered.