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DY: Dynamik und Statistische Physik
DY 17: Fluids II
DY 17.4: Talk
Monday, March 8, 2004, 17:15–17:30, H3
Thermal noise in thin liquid films — •Markus Rauscher1,2, Klaus Mecke1,2, and Günther Grün1,2 — 1Max-Planck-Institut für Metallforschung, Stuttgart — 2ITAP, Universität Stuttgart
Thermal noise becomes more and more important the smaller a system is. Recent studies of thin film evolution indicate that thermal noise might influence characteristic time-scales of film dewetting [J. Becker et at., Nature Materials Vol. 2, 59 (2003)]. Up to now, thin film flow was only studied with deterministic equations.
We develop a stochastic version of the thin film equation. In the thin film approximation, the stochastic incompressible hydrodynamic equations [Landau and Lifshitz, Vol. IV] reduce to the deterministic thin film equation plus a conserved noise term. We show that the noise term is consistent with the thermodynamical equilibrium distribution of the film thickness.