Hydrothermal Surface-Wave Instability and the Kuramoto-Sivashinsky Equation
R. A. Kraenkel, J. G. Pereira, M. A. Manna
Abstract
We consider a system formed by an infinite viscous liquid layer with a constant horizontal temperature gradient, and a basic nonlinear bulk velocity profile. In the limit of long-wavelength and large nondimensional surface tension, we show that hydrothermal surface-wave instabilities may give rise to disturbances governed by the Kuramoto-Sivashinsky equation. A possible connection to hot-wire experiments is also discussed.
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