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Prikladnaya Mekhanika i Tekhnicheskaya Fizika, 2007, Volume 48, Issue 2, Pages 27–38
(Mi pmtf2009)
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This article is cited in 4 scientific papers (total in 4 papers)
Rayleigh–Benard problem for an anomalous fluid
A. N. Ermolenko Novosibirsk State University, Novosibirsk, 630090
Abstract:
The stability of the state of rest of a heated infinite horizontal layer of a viscous heat-conducting fluid (the Rayleigh–Benard problem) is considered. The equation of state for the fluid takes into account the nonmonotonic temperature and pressure dependence of water density. Instability of the mechanical equilibrium with respect to small monotonic perturbations is studied. The effect of the problem parameters on the Rayleigh numbers and their corresponding critical motions is investigated numerically using linear theory. Numerical investigation of the spectral problem is based on the Godunov–Abramov orthogonalization method. The calculation results are compared with the well-known results for the limiting case where the density is considered a quadratic function of temperature and does not depend on pressure.
Keywords:
Rayleigh–Benard problem, Oberbeck–Boussinesq approximation, anomalous fluid, instability, perturbation monotonicity principle.
Received: 09.12.2004 Accepted: 24.05.2006
Citation:
A. N. Ermolenko, “Rayleigh–Benard problem for an anomalous fluid”, Prikl. Mekh. Tekh. Fiz., 48:2 (2007), 27–38; J. Appl. Mech. Tech. Phys., 48:2 (2007), 166–175
Linking options:
https://www.mathnet.ru/eng/pmtf2009 https://www.mathnet.ru/eng/pmtf/v48/i2/p27
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