Convective structures in a thin layer of an evaporating liquid under an airflow |
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Authors: | V P Reutov A B Ezersky G V Rybushkina V V Chernov |
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Institution: | (1) Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod, 603950 |
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Abstract: | Evolution of convective structures in a thin layer of an evaporating liquid (ethanol) located under a turbulent boundary layer
of an airflow is studied experimentally and theoretically. Evolution of the structures is examined under conditions of an
increased flow velocity. A transition is found from convective cells formed in the absence of the flow to convective rolls
elongated in the streamwise direction. The theoretical analysis is performed within a two-dimensional model of the flow in
the liquid layer. The boundary conditions on the liquid surface are obtained with the use of self-similar solutions for mean
fields in the airflow. The onset and evolution of a periodic system of rolls are simulated numerically. Theoretical conclusions
are compared with experimental data.
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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 48, No. 4, pp. 3–14, July–August, 2007. |
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Keywords: | Rayleigh-Benard convection shear flow convective structures temperature boundary layer “ cold film” |
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