Regensburg 2007 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 14: Fluid dynamics II

DY 14.4: Talk

Tuesday, March 27, 2007, 12:00–12:15, H2

Linear analysis of instability in a binary-liquid layer — •Ion Dan Borcia and Michael Bestehorn — Lehrstuhl für Theoretische Physik II, Brandenburgische Technische Universität Cottbus, Germany

Oscillatory and monotonic long wave Marangoni instability in a binary-liquid layer with deformable interface in the presence of Soret effect was studied using two simplified sets of equations [1,2]. The vertical dependency of the temperature and concentration was approximated with polynomials. The actual work is devoted to the study of the validity domain of this approximation in the parameter space, for the early stage of the instability. Thus, we compare the results from previous models with those computed for an extended system considering the temperature distribution and the concentrations described by time-dependent three-dimensional equations.

[1]I.D. Borcia, R. Borcia, M. Bestehorn, Europhys. Lett., 75(1),112 (2006).

[2]I.D. Borcia, R. Borcia, M. Bestehorn, J. Optoelectr. Adv. Mater., 8(3), 1033 (2006).