MATHEMATICAL MODEL OF HEAT AND MASS EXCHANGE AND OF AEROSOL SEPARATION IN AXIAL AND TWISTED DISPERSED-ANNULAR GAS AND LIQUID FLOWS

The paper presents systems of equations for a numerical and approximate mathematical model of combined processes of heat and mass exchange during contact cooling of gases and heating of liquid, as well as turbulent transfer and deposition of particles on a film in a vertical ascending dispersed-annular flow in a cylindrical channel. The numerical model is based on a system of partial differential equations in a two-dimensional form with boundary conditions of the fourth kind. The approximate model is constructed using a mathematical model of ideal displacement of gas and liquid, where the main parameters are the coefficients of heat and mass emission and of turbulent-inertial transfer of particles. Studying is carried out of transfer phenomena during contact condensation cooling of liquids (using water), as well as of gas purification from the finely dispersed phase (aerosol separation). The gas phase can be flue or process gas, and the aerosol particles can be small droplets and solid particles. Examples of determining the thermal and separation efficiency of processes in axial and swirling flows of gas and liquid are shown. The devices developed by the authors have been implemented at various enterprises

Author:  A. G. Laptev, E. A. Lapteva
Keywords:  heat and mass exchange, aerosol separation, mathematical model, efficiency of processes, gas cooling
Page:  1120