Measurement of Electrostatic Charge on Solid Particles in Solid‐Gas Suspension Flow

In this paper, we consider the propagation of a shock wave from a pure gas into a heterogeneous mixture consisting of solid particles suspended in a gas and having an electric charge. The applied mathematical model takes into account the speed and thermal interaction of the carrier and dispersed components of the mixture. The force interaction of particles and gas was described by the Stokes force. The carrier medium was described as a viscous compressible heat–conducting gas. The equations of the mathematical model were solved by the explicit finite–difference method of the second order of accuracy, using the non–linear correction of the grid function. The system of equations of the mathematical model was supplemented by boundary and initial conditions for the desired functions. As a result of numerical simulation, it was found that in an electrically charged gas suspension there is a difference in gas pressure and velocity, “average density” and velocity of the dispersed component, compared with similar values in a gas suspension with an electrically neutral dispersed component. The revealed differences in the dynamics of neutral and electrically charged dusty media can be explained by the fact that the dispersed component of an electrically charged gas suspension is affected by both aerodynamic drag forces and Coulomb forces. Due to interfacial interaction, the dynamics of the carrier medium changes.

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Generation of composite particle material due to coagulation of several dispersed fractions in gas suspension flow

Thermophysics and Aeromechanics ◽

10.1134/s0869864321030112 ◽

2021 ◽

Vol 28 (3) ◽

pp. 427-434

Author(s):

A. L. Tukmakov

Keyword(s):

Composite Particle ◽

Suspension Flow ◽

Gas Suspension ◽

Particle Material

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Solid Particle Demixing in a Suspension Flow of Viscous Gas

Journal of Fluids Engineering ◽

10.1115/1.3447182 ◽

1975 ◽

Vol 97 (1) ◽

pp. 106-111 ◽

Cited By ~ 2

Author(s):

A. Hamed ◽

W. Tabakoff

Keyword(s):

Experimental Data ◽

Numerical Scheme ◽

Suspended Solid ◽

Solid Particles ◽

Particle Migration ◽

Suspension Flow ◽

Particulate Flow ◽

Particulate Flows ◽

Flow Properties ◽

Impulsive Motion

The motion of a medium consisting of an incompressible viscous fluid and suspended solid particles was analyzed from the standpoint of continuum mechanics. It was assumed that the particles’ translational and rotational velocities were different from those of the fluid. A numerical scheme was used to determine the non-equilibrium particulate flow properties as well as their equilibrium and frozen values. The results are presented for the case of particulate flow due to the impulsive motion of an infinite flat plate in a suspension. A demixed region, with no particles present, was found to develop near the plate due to particle migration away from the wall. Similar demixed particle regions were noticed in the experimental data of particulate flows in pipes and channels.

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Hydrodynamic theory of heat transfer between a stabilized gas suspension flow and channel walls

International Journal of Heat and Mass Transfer ◽

10.1016/0017-9310(73)90086-0 ◽

1973 ◽

Vol 16 (4) ◽

pp. 725-733 ◽

Cited By ~ 4

Author(s):

Z.R. Gorbis ◽

F.E. Spokoinii

Keyword(s):

Heat Transfer ◽

Suspension Flow ◽

Hydrodynamic Theory ◽

Gas Suspension

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Pneumatic transport

Journal of Fluid Mechanics ◽

10.1017/s0022112069002242 ◽

1969 ◽

Vol 39 (2) ◽

pp. 407-432 ◽

Cited By ~ 160

Author(s):

P. R. Owen

Keyword(s):

Fine Particles ◽

Solid Wall ◽

Electrostatic Charge ◽

Difficult Problem ◽

Solid Particles ◽

Gas Velocity ◽

Physical Explanation ◽

Two Phase ◽

Horizontal Pipe ◽

Different Types

Certain aspects of the transport of solid particles by a turbulent airstream are discussed, namely: the conveyance of particles in a horizontal pipe, including those carrying an appreciable electrostatic charge; the mechanism of deposition onto a solid wall; and the behaviour of fine particles in a shear flow, such as that in a round jet.Rough estimates of the effect of the particles on the gaseous turbulence are made, and a primitive physical explanation is offered of the observed velocitylag and pressure drop associated with the transport of particles in a horizontal pipe, under conditions where the influence of the particles’ weight is significant.Attention is drawn to the difficult problem of dynamically scaling a two-phase flow, and to the different types of interaction between the phases which can occur in a pipe according to its size, the gas velocity through it, and the physical characteristics of the particles.The paper is an annotated version of a survey presented to the I.U.T.A.M. Symposium on ‘Flow of fluid-solid mixtures’ held in Cambridge during March 1969.

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