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Journal of Applied Mechanics and Technical Physics

2022 year, number 5

Numerical Simulation of Enrichment of the Air-Helium Mixture with a Bifunctional Sorbent Based on Glass Microspheres

A. S. Vereshchagin1,2,3, I. V. Kazanin1,2, V. N. Zinoviev1, V. M. Fomin1,2
1Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
2Novosibirsk State University, Novosibirsk, 630090, Russia
3Novosibirsk State Technical University, Novosibirsk, 630073, Russia
Keywords: composite sorbent, helium, microspheres, membrane-sorption method, numerical simulation, short-cycle adsorption, hyperbolic model

Abstract

A hyperbolic character of the convective part of the flow of an air-helium mixture through a granulated sorbent layer with allowance for the Forchheimer filtration is demonstrated. A numerical model of a one-dimensional flow of the air-helium mixture through an adsorber filled by a granulated sorbent with due allowance for air and helium diffusion inward cylindrical granules and helium confinement in microspheres. Within the framework of this model, verification of a numerical algorithm in problems of gas filtration through a porous medium and propagation of a pressure wave formed by the incident shock wave over a gas medium is performed. Experimental and numerical data are obtained and are found to be in good agreement. The enrichment phase is modeled by the method of short-cycle adsorption with the use of a bifunctional sorbent based on microspheres. It is demonstrated that the mass fraction of helium in the air-helium mixture can be almost doubled (from 0.7 to 1.3%)with the helium extraction degreeof 9 0.4%.