| Abstract: | The problem of convective instability of a fluid in a system consisting of two horizontal porous strata with different permeabilities
and a permeable common boundary is considered. The problem is investigated in parametric form as a function of the stratum
thickness ratio and stratum permeabilities. As distinct from a uniform stratum, in this case the neutral curve can have one
or two minima depending on the relationship between the parameters. The case of two minima is characterized by the condition
of loss of stability of the fluid in the system as a whole and in the thinner stratum with greater permeability. These minima
correspond to significantly different wave numbers.
Makhachkala. Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 1, pp. 165–169, January–February,
1999. |
