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TRANSITIONAL CONVECTIVE STRUCTURES IN A LIQUID LAYER WITH A DRIFT FLOW

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In this work we are concerned with numerical study of three-dimensional convective structures arising in a thin liquid layer heated from below and subjected to a horizontal drift flow. A free upper surface of the liquid contacts with a turbulent boundary layer of an air current which determines tangential surface stresses and heat emission. Basic parameters of the system correspond to the region of laminar-turbulent transition of the convective flow. The study is aimed at the explanation of former experiments by A. Ezersky and V. Chernov (1999) on transformations of the convective structures in a blown-off layer of silicon oil. Using reformulation of the basic equations, spectral decomposition along the horizontal coordinates, and discretization in the vertical direction we obtained established regimes observed in the experiment with increasing the airflow velocity: disordered cellular flow, elongated and merged cells, and longitudinal rolls.

Author(s):

Galina Rybushkina    
Institute of Applied Physics of RAS
Russian Federation

Vladimir Reutov    
Institute of Applied Physics of RAS
Russian Federation