Steady convection in MHD Bénard problem with Hall effects

Lidia Palese

Abstract


In this paper we apply some variants of the classical energy method to study the nonlinear Lyapunov stability of the thermodiffusive equilibrium for a viscous thermoelectroconducting fully ionized fluid in a horizontal layer heated from below. The classical L2 norm, too weak to highlight some stabilizing or unstabilizing effects, can be used to dominate the nonlinear terms. A more fine Lyapunov function is obtained by reformulating the initial perturbation evolution problem, in terms of some independent scalar fields. In such a way, if the principle of exchange of stabilities holds, we obtain the coincidence of linear and nonlinear stability bounds.

Keywords


stability; energy method

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DOI: http://dx.doi.org/10.1478/AAPP.952A3

Copyright (c) 2017 Lidia Rosaria Palese

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