Hydrodynamics of Two-Phase Upflow in a Pneumatic Classifier with the Variable Cross-Section

Lytvynenko, Andrii; Pavlenko, Ivan; Yukhymenko, Mykola; Ostroha, Ruslan; Piteľ, Ján

doi:10.1007/978-3-030-50491-5_21

Cited by 2 publications

(1 citation statement)

References 34 publications

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“…The migration process of mineral components in the soil [38] can also be studied more precisely using the proposed fractional-calculus approach. The proposed methodology also extends the understanding of the distribution of fine particles' concentration and the height of the rhomb-shaped pneumatic classificators [39].…”

Section: Discussionmentioning

confidence: 83%

Improvement of Mathematical Model for Sedimentation Process

Pavlenko

Ochowiak

Agarwal³

et al. 2021

Energies

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In this article, the fractional-order differential equation of particle sedimentation was obtained. It considers the Basset force’s fractional origin and contains the Riemann–Liouville fractional integral rewritten as a Grunwald–Letnikov derivative. As a result, the general solution of the proposed fractional-order differential equation was found analytically. The belonging of this solution to the real range of values was strictly theoretically proven. The obtained solution was validated on a particular analytical case study. In addition, it was proven numerically with the approach based on the S-approximation method using the block-pulse operational matrix. The proposed mathematical model can be applied for modeling the processes of fine particles sedimentation in liquids, aerosol deposition in gas flows, and particle deposition in gas-dispersed systems.

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Section: Discussionmentioning

confidence: 83%

Improvement of Mathematical Model for Sedimentation Process

Pavlenko

Ochowiak

Agarwal³

et al. 2021

Energies

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Effect of Erosion on Surface Roughness and Hydromechanical Characteristics of Abrasive-Jet Machining

Baha,

Pitel,

Pavlenko

2024

JES

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The article contains the fundamental results of the experimental and numerical investigations for pneumo-abrasive unit nozzles with different geometries. The research was purposed by the pressing need to develop an inexpensive and effective working nozzle design of the air-abrasive unit which can be applied for surface processing before some technological processes are performed, as well as for surface coating, descaling after thermal treatment, processing of hollow holes of the crankshafts, smoothing of the inner surfaces of the narrow channels between the impeller blades after electric discharge machining for ultrahigh-pressure combination compressors. Several designs were considered, ranging from the simplest to those with a complicated inner channel geometry. The impact of the nozzle material and challenging inner surface application on its characteristics has also been studied. The research was done using the application of modern CFD complexes for numerical modeling of the air-abrasive mixture discharge from the working nozzle of the pneumo-abrasive unit. In addition, physical experimentation was provided. The methods applied in the research allow for profound, systematic research of spraying units operating on the air-abrasive mixture within a wide range of geometrical and mode parameters. The novelty of the gained results lies in the development of the mathematical model of the pneumo-abrasive nozzle operating process, the working out of a cheaper nozzle design, getting information about air-abrasive mixture distribution along the nozzle length, giving practical recommendations for calculation and designing a working nozzle for the jet-abrasive unit.

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Hydrodynamics of Two-Phase Upflow in a Pneumatic Classifier with the Variable Cross-Section

Cited by 2 publications

References 34 publications

Improvement of Mathematical Model for Sedimentation Process

Improvement of Mathematical Model for Sedimentation Process

Effect of Erosion on Surface Roughness and Hydromechanical Characteristics of Abrasive-Jet Machining

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