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SYSS: Structure Formation and Self-Organization in non-equilibrium Systems

SYSS 3: Structure Formation and Self-Organization in non-equilibrium Systems - Poster

SYSS 3.11: Poster

Donnerstag, 30. März 2006, 16:00–18:00, P1

Driving convection by a temperature gradient or a heat current — •Pascal Matura and Manfred Lücke — Institut für Theoretische Physik, Universität des Saarlandes, D-66041 Saarbrücken, Germany

Bifurcation properties, stability behavior, dynamics, and the heat transfer of convection structures in a horizontal fluid layer that is driven away from thermal equilibrium by imposing a vertical temperature difference are compared with those resulting from imposing a heat current. In particular oscillatory convection that occurs in binary fluid mixtures in the form of travelling and standing waves is determined numerically for the two different driving mechanisms. Conditions are elucidated under which current driven convection is stable while temperature driven convection is unstable.