Berlin 2005 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 10: Fluid Dynamics I
DY 10.5: Vortrag
Freitag, 4. März 2005, 11:15–11:30, TU H3010
Change of the surface morphology in the evolution of liquid two-layer films — •Andrey Pototsky1, Michael Bestehorn1, Domnic Merkt1, and Uwe Thiele2 — 1Lehrstuhl fuer Theoretische Physik II, BTU Cottbus, Erich-Weinert Str. 1, 03046 Cottbus, Germany — 2MPI fuer Physik komplexer Systeme, Noethnitzer Str. 38, 01187 Dresden, Germany
We consider a two-layer liquid film placed on a solid support made of two different immiscible liquids, driven by long-range apolar and short-range polar interactions, with free liquid-liquid and liquid-gas interfaces. Using the long wave approximation we derive the evolution equations for the local film thicknesses. For the initially unstable flat films, the primary unstable mode can be of two different types: a varicose or a zigzag mode. We show that during the time evolution, the mode type can change via switching between two stable stationary solutions and due to coarsening.