Oscillatory and monotonic modes of longwave Marangoni convection in a thin film

Details Oscillatory and monotonic modes of longwave Marangoni convection in a thin film Oscillatory and monotonic modes of longwave Marangoni convection in a thin film

2010-02-18

arxiv.org/abs/1002.3540v2

Physics

Fluid Dynamics

4 pages, 3 figures

Scientific paper

We study longwave Marangoni convection in a layer heated from below. Using the scaling $k = O(\sqrt{\rm Bi})$, where $k$ is the wavenumber and ${\rm Bi}$ is the Biot number, we derive a set of amplitude equations. Analysis of this set shows presence of monotonic and oscillatory modes of instability. Oscillatory mode has not been previously found for such direction of heating. Studies of weakly nonlinear dynamics demonstrate that stable steady and oscillatory patterns can be found near the stability threshold.

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