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Specific features of unsteady exhaustion of a gas–particle medium into vacuum

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Abstract

Results of an analysis of two-dimensional unsteady exhaustion of a one-velocity gas–particle medium into vacuum for limiting equilibrium cases of heat transfer between the phases are reported. Domains of existence of a one-dimensional Riemann wave and a lateral expansion wave, as well as boundaries of the flow expansion region are determined. Under thermal equilibrium conditions, the reverse flow is found to occupy a large domain extending beyond the boundaries defined by angles of expansion for an ideal gas and for a gas–particle mixture with thermally insulated phases. Exhaustion of a nonequilibrium (in terms of velocities and temperatures) two-phase medium into vacuum is numerically simulated. It is demonstrated that a barrel-shaped structure with wave expansion of the gas and a combined discontinuity in the expanding gas–particle mixture is formed.

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Authors and Affiliations

  1. Mozhaiskii Military Space Academy, 197198, St. Petersburg, Russia

    D. V. Sadin & V. M. Varvarskii

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  1. D. V. Sadin
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  2. V. M. Varvarskii
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Correspondence to D. V. Sadin.

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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 57, No. 3, pp. 39–48, May–June, 2016.

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Sadin, D.V., Varvarskii, V.M. Specific features of unsteady exhaustion of a gas–particle medium into vacuum. J Appl Mech Tech Phy 57, 422–431 (2016). https://doi.org/10.1134/S0021894416030056

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  • DOI: https://doi.org/10.1134/S0021894416030056

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