Mathematical simulation of the drying of suspensions and colloidal solutions by their depressurization

Lashkov, V. A.; Levashko, E. I.; Сафин, Р. Г.

doi:10.1007/s10891-006-0132-z

Cited by 4 publications

(6 citation statements)

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“…It can be seen that the average and most probable values differ significantly from each other for all impact angles. The experimental data from [21] are shown in both figures.. Dependences obtained for a mixture of particles of various forms are generally in better agreement with experimental data than for particles of individual forms. The presented results show that, firstly, as expected, a mixture of particles of different types of forms better corresponds to a real dispersed phase, and secondly, the proposed impact model allows calculating the average velocity of reflected particles with a sufficiently high accuracy.…”

Section: Numerical Study Of Particle Rebound From a Surface And Compa...supporting

confidence: 60%

“…1) in equal proportions was considered, meanwhile, the form parameters of particles of individual types were varied. Such a mixture of particles of various forms with variable parameters b/a and c/b, in our opinion, is closer to that used in experiments [21] than a mixture of particles of the same form. After calculating the statistical characteristics of the reflected particles of various forms, the statistical characteristics for a homogeneous mixture of particles were calculated (the proportions of particles of various forms in the mixture were assumed to be the same).…”

Section: Numerical Study Of Particle Rebound From a Surface And Compa...mentioning

confidence: 55%

“…As it was specified experimentally in [21], where the rebound of synthetic corundum particles from plates of elasto-plastic materials was studied (steel, copper and lead were considered), the average values of the restitution coefficients of the normal a n and tangential a τ (in the impact plane) of the velocities of the center of mass of particles depend significantly on the velocity and angle of impact. The material of the plates also affects these coefficients, but its influence on a n is much weaker than on a τ .…”

Section: Model Of Collision Of a Non-spherical Particle With A Surfacementioning

confidence: 97%

“…The impact interaction of corundum particles with the surface of a wall made of steel St3 is studied in the present paper by numerical calculations, the results of which are given below. The dependence of a nc on the velocity and impact angle for this pair is taken from [21] and has the form:…”

Section: Model Of Collision Of a Non-spherical Particle With A Surfacementioning

confidence: 99%

“…All the results presented below were obtained for nonrotating particles before the impact and the impact velocity V − p = 200 m/s, which corresponds to the experimental conditions [21]. Each time, the orientation of the particle before the first impact with the surface was assumed to be random and equally probable.…”

Section: Numerical Study Of Particle Rebound From a Surface And Compa...mentioning

confidence: 99%

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Model of non-spherical particles' rebound and scattering at high speed interaction with a streamlined surface

Panfilov

2022

Technical Physics

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A new model is proposed for a non-spherical solid particles' impact interaction with a surface as applied to gas-particle flows over surfaces. The range of a particle impact speed typical for a vehicle flight in a dusty atmosphere is considered. The model is based on the laws of mechanics and experimental data on the restitution coefficient of the particle normal velocity. The tangential force impulse during a particle-surface interaction is assumed to be proportional to both the normal impulse and the mean tangential velocity of the particle contact point. The space orientation of incident particles relative to the surface is considered as random. The rebound of particles of different shape with varying shape parameters and of a particle mixture is studied numerically. Statistical characteristics of particles' rebound and scattering are obtained. Comparison with the known experimental data of numerical results for the mean values of the normal and tangential velocities of the particles' gravity centers in the plane of impact after rebound showed their good agreement. Keywords: dispersed particles, 3D model of impact, numerical investigation, statistical characteristics of rebound and scattering, comparison with experimental data.

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Section: Numerical Study Of Particle Rebound From a Surface And Compa...supporting

confidence: 60%

Section: Numerical Study Of Particle Rebound From a Surface And Compa...mentioning

confidence: 55%

Section: Model Of Collision Of a Non-spherical Particle With A Surfacementioning

confidence: 97%

Section: Model Of Collision Of a Non-spherical Particle With A Surfacementioning

confidence: 99%

Section: Numerical Study Of Particle Rebound From a Surface And Compa...mentioning

confidence: 99%

See 3 more Smart Citations

Model of non-spherical particles' rebound and scattering at high speed interaction with a streamlined surface

Panfilov

2022

Technical Physics

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Thermohydrodynamics of a Spray Drying Installation with Convective-Radiative Energy Supply

Akulich

Slizhuk

2020

J Eng Phys Thermophy

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Development of apparatuses based on kinetic calculation data of the process of removing liquid from solid materials by reducing pressure of vapor-gas medium

Lashkov

Kondrasheva

Хамидуллина

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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The possibility of developing a apparatus based on the results of kinetic calculations of the processes, occurring in it, is considered. The studies were carried out with the system solid-liquid-vapor-gas medium with a continuous increase in vacuum above the surface of a layer of the dispersed material. The presence of the liquid phase and the vapor-gas phase in equilibrium with it makes it possible to provide a change in concentration, structure, or cooling in the system due to artificial disturbance of the dynamic equilibrium of the system. To develop a mathematical model of the liquid removal process, a model of ideal mixing in the vapor-gas phase and a layer of the dispersed material was adopted. The calculation results are presented in the form of kinetic dependences of the main process parameters. Calculation of the apparatus is carried out at the highest load in the vapor-gas phase during the period of removal of the free moisture. In this case, the influence of rarefaction on the physical characteristics of the removed fluids and the design features of the apparatus being calculated was taken into account.

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Mathematical simulation of the drying of suspensions and colloidal solutions by their depressurization

Cited by 4 publications

References 0 publications

Model of non-spherical particles' rebound and scattering at high speed interaction with a streamlined surface

Model of non-spherical particles' rebound and scattering at high speed interaction with a streamlined surface

Thermohydrodynamics of a Spray Drying Installation with Convective-Radiative Energy Supply

Development of apparatuses based on kinetic calculation data of the process of removing liquid from solid materials by reducing pressure of vapor-gas medium

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