DARCY CONVECTION ANISOTROPIC PROBLEM WITH MULTISTABILITY OF STATIONARY MOTIONS FOR RECTANGLE
DOI:
https://doi.org/10.53555/eijms.v5i1.36Abstract
Based on the Darcy model, uid convection in a porous rectangle is analyzed taking into account anisotropy of thermal characteristics and permeability. Relations between parameters for which the problem belongs to the class of cosymmetric systems are derived. For this case explicit formulas for the critical numbers of the loss of stability of mechanical equilibrium are found. Using a nite-di erence method that preserves the cosymmetry of the problem, family of stationary convective regimes is computed. Through the computational experiment the destruction of families is demonstrated in the case of violation of the conditions of cosymmetry. As result the appearance of a nite number of stationary regimes are obtained.
References
. Abdelhafez M.A., Tsybulin V.G. Anisotropy e ect on the convection of a heat-conducting uid in a porous medium
and cosymmetry of the darcy problem // Fluid Dynamics. 2017. . 52. 1. . 49-57.
. Yudovich V. I. Cosymmetry, degeneration of solutions of operator equations, and onset of a ltration convection //
Mathematical Notes of the Academy of Sciences of the USSR. 1991. Vol. 49, no. 5. P. 540 545.
. Yudovich V. I. Bifurcations for Perturbations Violating Cosymmetry // Dokl. Ross. Akad. Nauk 398, 57-61 (2004).
. Tsybulin V., Karasozen B. Destruction of the family of steady states in the planar problem of Darcy convection. //
Phys. Lett. A. 2008. Vol. 372, N 35. P. 5639 5643.
. Govorukhin V.N., Shevchenko I.V. Multiple equilibria, bifurcations and selection scenarios in cosymmetric problem
of thermal convection in porous medium //Phys. D. 2017. Vol. 361. P. 42 58.
. Abdelhafez M.A., Tsybulin V.G. umerical simulation of convective motion in an anisotropic porous medium and
cosymmetry conservation // Computational Mathematics and Mathematical Physics. 2017. . 57. 10. . 1706-1719.
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