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Bidispersive thermal convection

机译:双分散热对流

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摘要

We obtain the linear instability and nonlinear stability thresholds for a problem of thermal convection in a bidispersive porous medium with a single temperature. It is important to note that we show that the linear instability threshold is the same as the nonlinear stability one. This means that the linear theory is capturing completely the physics of the onset of thermal convection. This result contrasts with the general theory of thermal convection in a bidispersive porous material where the temperatures in the macropores and micropores are allowed be different. In that case the coincidence of the stability boundaries has not been proved.
机译:我们获得了单温度双分散多孔介质中热对流问题的线性不稳定性和非线性稳定性阈值。重要的是要注意,我们表明线性不稳定性阈值与非线性稳定性阈值相同。这意味着线性理论正在完全捕获热对流发生的物理过程。该结果与在双分散多孔材料中允许大孔和微孔温度不同的热对流的一般理论相反。在那种情况下,稳定性边界的重合性尚未得到证明。

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