Thermal stability of a layer with permeable boundaries and variable gravitational field

Details Thermal stability of a layer with permeable boundaries and variable gravitational field Thermal stability of a layer with permeable boundaries and variable gravitational field

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.167...69s&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 167, no. 1, p. 69-80.

Astronomy and Astrophysics

Astrophysics

Fluid Boundaries, Gravitational Fields, Permeability, Thermal Stability, Magnetohydrodynamics, Porous Boundary Layer Control, Thermohydraulics

Scientific paper

The aim of this paper is to investigate the thermal stability of a fluid layer with permeable boundaries and a variable gravitational field. It is observed that the principle of exchange of stabilities is valid when the layer is heated from below and the complex growth rate of an arbitrary oscillatory mode exists outside of a circle whose radius depends upon the permeability parameter, Prandtl number and wavelength of the mode. In the case of a layer heated from below, gravity increasing upward has a destabilizing effect whereas the permeability parameter has a stabilizing effect.

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