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Prikladnaya Mekhanika i Tekhnicheskaya Fizika, 2003, Volume 44, Issue 4, Pages 22–34
(Mi pmtf2514)
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This article is cited in 3 scientific papers (total in 3 papers)
Relaxation-induced suppression of vortex disturbances in a molecular gas
Yu. N. Grigor'eva, I. V. Ershovb a Institute of Computational Technologies, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090
b Novosibirsk State Academy of Water Transport, Novosibirsk, 630099
Abstract:
The influence of thermal excitation on a finite-amplitude vortex disturbance in a shear flow of a molecular gas is studied in a model problem. The evolution of such vortex structures is typical of both the nonlinear stage of the laminar–turbulent transition and for developed turbulence. Since the excitation level was assumed to be comparatively low, full Navier–Stokes equations for a compressible heat-conducting gas were used in calculations; nonequilibrium was taken into account by the coefficient of bulk viscosity. As the bulk viscosity increases in the range of realistic values, the disturbance-energy damping rate in a weakly compressible flow increases approximately by 10%. The increase in the Mach number enhances the effect of disturbance suppression.
Keywords:
vortex disturbances, molecular gas, relaxation, suppression.
Received: 24.10.2002 Accepted: 11.12.2002
Citation:
Yu. N. Grigor'ev, I. V. Ershov, “Relaxation-induced suppression of vortex disturbances in a molecular gas”, Prikl. Mekh. Tekh. Fiz., 44:4 (2003), 22–34; J. Appl. Mech. Tech. Phys., 44:4 (2003), 471–481
Linking options:
https://www.mathnet.ru/eng/pmtf2514 https://www.mathnet.ru/eng/pmtf/v44/i4/p22
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