The experimental data on the density, viscosity, and boiling temperature of the coffee extract

The paper shows the experimental data on the density, viscosity, and boiling temperature of the coffee extract. The mass fraction of the dry substances varies in the range of 15-70 % for all measurements. The coffee extract temperature varies in the rage of 20-80 °C for the density and viscosity measurements. It is found that the coffee extract density varies in the range of 1030-1350 kg/m3 for the considered cases. The coffee extract viscosity varies in the range of 0.0008-27.4810 Pa•s for the considered cases. The coffee extract boiling temperature varies in the range of 100.0-103.3 °C at atmospheric pressure. It was found that the coffee extract is foaming in the considered range of dry substances mass fraction. The foaming temperature is decreasing with the dry substances mass fraction increasing. © 2020 Published under licence by IOP Publishing Ltd

Modelling of Sediment Mixing Processes During Preparation of Conversion of Scandium Concentrate

Modern methods of computational fluid dynamics make it possible to evaluate the effectiveness of various design options for chemical devices already at the design stage. This work is devoted to the study of the processes of mixing sediment with a high solids content, in the preparation of the conversion of scandium concentrate, using the methods of computational fluid dynamics, based on a previously developed mathematical model. As a result of the work, the parameters of the distribution of the volume fraction of the solid phase were established, and the velocity field of the suspension in the simulated apparatus was investigated. © Published under licence by IOP Publishing Ltd

Mathematical Model of Two-Phase Flow Processes in Heat Exchange Tubes of the Falling Film Evaporator

In this work, a mathematical model and a method for calculating the film evaporation apparatus were proposed. The mathematical model provides data on the distribution of hydrodynamic parameters of a two-phase flow along the length of the heat exchange tubes of the evaporator. The obtained data are necessary for the design of an efficient falling film evaporator. © Published under licence by IOP Publishing Ltd

Experimental research of the bovine black albumin spray drying processes

The paper shows the results of the experimental research of the spray drying of the bovine black albumin. The physicochemical properties of the dried bovine black albumin were obtained. The granulometric composition and the particle shape structure of the dried product were obtained for the spray drying using the centrifugal sprayer and the pneumatic sprayer for the various solid content range in the source product and the various drying agent initial temperature. The effect of the spraying method, the drying agent initial temperature and the solid content range in the source product on the dried bovine black albumin particle average size was defined. © 2019 Published under licence by IOP Publishing Ltd

INVESTIGATION OF HYDRODYNAMIC PARAMETERS DISTRIBUTION IN HEAT EXCHANGE TUBES OF FALLING FILM EVAPORATOR

Falling film evaporators have a high heat transfer rate with relatively small volumes of the device [1, 2, 3]. It is advisable to have information about changes in hydrodynamic parameters along the length of heat exchange tubes, when developing a falling film evaporator.This work was supported by the Russian Foundation for Basic Research (grant # 19-53-55002)

INVESTIGATION OF TWO-PHASE FLOW HYDRODYNAMICS OF HEAT EXCHANGE TUBE OUTLET FALLING FILM EVAPORATOR

Studies of hydrodynamics and heat transfer in falling film evaporators are presented in a significant number of scientific papers [1, 2, 3]. This work is devoted to the study of a distribution of a gas phase velocity and a liquid phase irrigation density at the outlet of the heat exchange tube of the falling film evaporator.This work was supported by the Russian Foundation for Basic Research (grant # 19-53-55002)

Simulation method of the low-Re flows in the packed bed technological equipment

The paper shows the semiempirical method of a numerical simulation of the low-Re flows in the packed bed technological apparatus. The proposed method is based on the Navier-Stokes equations modification by the linear momentum sources equations in the packed bed zones. It is found that the simulation error of the proposed method is not more than 6.2% for low-density finite element meshes. The average value of the simulation error is about 3.0% for all shown cases. It was found that the proposed method simulation error almost independents on the mesh density. In the main, the simulation error is determined by the linear momentum sources equations approximation error. © Published under licence by IOP Publishing Ltd

Method for Simplified Simulation of the Pseudo-Viscosity of the Flows with Solid Particles

The short review of the solid phase pseudo-viscosity CFD-simulation methods is presented. The simplified method based on Einstein's equation, experimental data approximation, and the multiphase mixture model for the solid phase pseudo-viscosity simulation is proposed. The results of the experimental verification of the proposed method are presented, its terms of use are determined. © Published under licence by IOP Publishing Ltd

Investigation of the Hydrodynamics of Mixing Two Technological Media with a Small-Sized Agitator

The paper shows the results of the two-phase mixing hydrodynamics simulation in the first reactor of the crystallization cascade. The research results were obtained using the ANSYS Fluent CFD code. The distributions of velocity and liquid mixture components volume fractions were obtained. The time of the full averaging of the liquid mixture components volume fractions were obtained. © 2021 Author(s)