Berlin 2012 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 22: Posters I

DY 22.53: Poster

Mittwoch, 28. März 2012, 17:00–19:00, Poster A

Lattice Boltzmann simulation of thermal convection in a thin filmMarkus Abel3, Luca Biferale2, Mauro Sbragaglia2, and •Henning Krüsemann11Universität Potsdam — 2Università degli Studi di Roma Tor Vergata — 3Nancy Université

Rayleigh-Bénard convection in thin films has been observed but not yet systematically investigated. Despite being well-studied, the topic still poses open problems, mainly related with scaling at extremely high Rayleigh numbers. Here, we go the opposite direction in considering convection in a very thin film with the aim to study the influence of the forces acting on very small scales, i.e. mainly surfactant forces and disjoining pressure. In detail, we use the shallow water approximation to get a closed set of equations for the thin film evolution. By means of a two-population Lattice-Boltzmann model we explore the dynamics of the system and compare it to a conventional 2D Rayleigh-Bénard system.

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DPG-Physik > DPG-Verhandlungen > 2012 > Berlin