COMPUTER MODELING OF TWO-PHASE MEDIA SEPARATION PROCESSES IN SEPARATORS WITH CURVED INSERTS
Authors:
1.
Kazan State Agrarian University
(Physics and Mathematics, Professor)
2.
Kazan State University of Architecture and Engineering
3.
KazGAU
4.
Kazan State Agrarian University
Type:
Article
Pages:
from 85
to 90
Status:
In work
Language:
Russian
Keywords:
COMPUTER MODELING, TWO-PHASE MEDIA, CURVILINEAR CHANNELS, SEPARATIONS, COMPUTATIONAL EXPERIMENT
Abstract (English):
Computer modeling of the process of separation of two-phase media in separators with curvilinear inserts on the basis of the mathematical model of two-phase mixture flow in channels between inserts, constructed using the equations of conservation of mass and momentum of the mechanics of of multiphase media. The conservation equations are written for an orthogonal system of coordinates associated with the surface of the channel, which are simplified by taking into account the thin-layer flow. The specific shape of the flow region in the calculations are specified through Lame coefficients. Calculations to determine the velocity field of the liquid phase were carried out using the method of equal flow surfaces, and at that the corresponding closing relations for the force of interphase interaction and effective viscosity of the medium are used. and effective viscosity of the medium. Velocity of the dispersed phase after determination of the velocity field of the liquid phase is calculated by the equation of motion of this phase at the chosen force of interphase interaction, which allows to calculate the trajectory of particle motion and its knowledge is a determining factor for separation processes. To carry out numerical calculations we have reasonable input conditions on current lines and values of longitudinal velocity on them. An algorithm for calculating the motion of each phase for the computer modeling. Numerical calculations were performed for parabolic and conical channels, taking into account the presence of an inlet flow section and the influence of centrifugal force. A computational experiment was realized for different channel parameters and two-phase medium flow. At the initial section of the channel, the flow develops from an initial flat profile to a parabolic form. The flow velocities near the channel walls slow down and accelerate in the center of the cross-sectional region. This causes the current lines to curve in the initial section. The dispersed phase velocity and its direction are strongly influenced by the phase density difference, particle size and concentration, medium viscosity and centrifugal force, which determine the separation characteristics of the apparatus. On the basis of computer modeling various flow regimes and the influence of various medium parameters on the hydrodynamic situation in the flow region are studied, which allows us to set and solve the problems of optimal hardware design of the corresponding process of separation of two-phase media.
Computer modeling of the process of separation of two-phase media in separators with curvilinear inserts on the basis of the mathematical model of two-phase mixture flow in channels between inserts, constructed using the equations of conservation of mass and momentum of the mechanics of of multiphase media. The conservation equations are written for an orthogonal system of coordinates associated with the surface of the channel, which are simplified by taking into account the thin-layer flow. The specific shape of the flow region in the calculations are specified through Lame coefficients. Calculations to determine the velocity field of the liquid phase were carried out using the method of equal flow surfaces, and at that the corresponding closing relations for the force of interphase interaction and effective viscosity of the medium are used. and effective viscosity of the medium. Velocity of the dispersed phase after determination of the velocity field of the liquid phase is calculated by the equation of motion of this phase at the chosen force of interphase interaction, which allows to calculate the trajectory of particle motion and its knowledge is a determining factor for separation processes. To carry out numerical calculations we have reasonable input conditions on current lines and values of longitudinal velocity on them. An algorithm for calculating the motion of each phase for the computer modeling. Numerical calculations were performed for parabolic and conical channels, taking into account the presence of an inlet flow section and the influence of centrifugal force. A computational experiment was realized for different channel parameters and two-phase medium flow. At the initial section of the channel, the flow develops from an initial flat profile to a parabolic form. The flow velocities near the channel walls slow down and accelerate in the center of the cross-sectional region. This causes the current lines to curve in the initial section. The dispersed phase velocity and its direction are strongly influenced by the phase density difference, particle size and concentration, medium viscosity and centrifugal force, which determine the separation characteristics of the apparatus. On the basis of computer modeling various flow regimes and the influence of various medium parameters on the hydrodynamic situation in the flow region are studied, which allows us to set and solve the problems of optimal hardware design of the corresponding process of separation of two-phase media.
Keywords:
COMPUTER MODELING, TWO-PHASE MEDIA, CURVILINEAR CHANNELS, SEPARATIONS, COMPUTATIONAL EXPERIMENT
COMPUTER MODELING, TWO-PHASE MEDIA, CURVILINEAR CHANNELS, SEPARATIONS, COMPUTATIONAL EXPERIMENT
