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A nonlinear stability threshold is determined for the problemof convection in a layer of non-Boussinesq fluid with prescribedheat flux on the lower boundary and constant-temperature uppersurface. The convection problem is one in which motion can penetratefrom an unstable layer into a gravitationally stable one andthe unconditional nonlinear analysis necessitates utilizationof a spatially weighted energy. 相似文献
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