Abstract
In the Darcy–Boussinesq–Brinkman scheme, the onset of convection in a porous horizontal layer \(\mathtt L \) with depth-dependent permeability and viscosities is investigated. The linear instability is studied and the global nonlinear stability is investigated via the auxiliary system method. By looking for symmetries and skew-symmetries hidden in the Darcy–Boussinesq–Brinkman model, a condition, in closed form, guaranteeing the global nonlinear stability is furnished. Applications to the earth’s mantle and to artificial porous materials are furnished.
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Notes
In Rionero (2014b) the onset of convection in ternary porous layers with depth-dependent permeability and viscosity has been studied in the absence of Brinkman term.
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This paper has been performed under the auspices of G.N.F.M. of I.N.d.A.M. and Leverhulm Trust, “Tipping points: mathematics, metaphors and meanings”.
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Rionero, S. Influence of Depth-Dependent Brinkman Viscosity on the Onset of Convection in Ternary Porous Layers. Transp Porous Med 106, 221–236 (2015). https://doi.org/10.1007/s11242-014-0397-1
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DOI: https://doi.org/10.1007/s11242-014-0397-1