Numerical simulations of binary fluid convection in large aspect ratio annular containers |
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Authors: | A Alonso O Batiste I Mercader |
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Institution: | 1.Departament de Física Aplicada,Universitat Politècnica de Catalunya,Barcelona,Spain |
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Abstract: | The patterns arising in large aspect ratio annular containers
heated from below are analyzed for water-ethanol
mixtures with negative Soret coupling. The subcritical Hopf
bifurcation at the onset of convection leads to a very rich
dynamics. Using high resolution numerical tools based on spectral
methods to solve the hydrodynamic equations we obtain and
review the properties of the different regimes arising in
early stages of convection: spatially extended stationary and
travelling wave convective roll structures, dispersive
chaotic states, and several types of localized convection.
The dynamics triggered by the Eckhaus–Benjamin–Feir instability
is presented for a mixture with a moderate negative value of
the separation ratio. |
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Keywords: | |
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