Berlin 2012 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 22: Posters I
DY 22.53: Poster
Wednesday, March 28, 2012, 17:00–19:00, Poster A
Lattice Boltzmann simulation of thermal convection in a thin film — Markus Abel3, Luca Biferale2, Mauro Sbragaglia2, and •Henning Krüsemann1 — 1Universität 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.