On the Action of Internal Heat Sources on Convective Motion in a Porous Medium Heated from Below
V. N. Govorukhin
Southern Federal University, Rostov-on-Don, 344090 Russia
Keywords: filtration convection, cosymmetry, convection, steady regimes
Abstract
The effect of internal heat sources on the flow pattern in the filtration convection problem with cosymmetry is studied numerically. Low-intensity heat sources, whose presence leads to violation of cosymmetry and breakdown of the one-parameter family of steady regimes are considered. Theoretically predicted scenarios for the breakdown of the family into a finite number of steady regimes and the occurrence of slow periodic motions are confirmed. The existence of relaxation oscillations is established for large Rayleigh numbers.
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