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Natural convection in porous annular domains: Mimetic scheme and family of steady states

机译:多孔环形区域中的自然对流:模拟方案和稳态族

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摘要

Natural convection of the incompressible fluid in the porous media based on the Darcy hypothesis (Lapwood convection) gives an intriguing branching off of one-parameter family of steady patterns. This scenario may be suppressed in computations when governing equations are approximated by schemes which do not preserve the cosymmetry property. We consider the problem for the annular porous domain in polar coordinates and derive a mimetic finite-difference scheme. This scheme allows to compute the family of convective regimes accurately and to detect the instabilities on some parts of the family.
机译:基于达西假设的多孔介质中不可压缩流体的自然对流(Lapwood对流)提供了一个有趣的分支,它涉及一类稳定模式的参数。当控制方程由不保留对称性的方案近似时,可以在计算中抑制这种情况。我们考虑了极坐标中的环形多孔域的问题,并推导了模拟的有限差分方案。这种方案可以精确计算对流形式的家庭,并检测家庭中某些部分的不稳定性。

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