Solitary Roll Vortices in the Mixed Convection of a Vertical Fluid Layer |
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| Authors: | Norbert P. Hoffmann Martin Withalm |
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| Affiliation: | Hamburg University of Technology, Institute of Mechanics and Ocean Engineering, Eißendorfer Str. 42, 21073 Hamburg, Germany |
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| Abstract: | Some earlier experimental and numerical findings from convection in vertical channels suggest that localized convection rolls could play a role in the transition process of free or mixed convection. In the present work solitary convection roll vortices for a vertical fluid layer with stable stratification, differential shear and differentially heated side-walls have been obtained numerically for a fluid of unit Prandtl number. The solutions appear through saddle-node bifurcations and in certain parameter ranges they do also exist for linearly stable basic flow. (© 2009 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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