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Nonstationary effect of artificial perturbations on a nonisothermal falling liquid film

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Abstract

The effect of nonstationary artificial perturbations on the formation of rivulets on the surface of a nonisothermal liquid film flowing down a vertical plate with a heater has been experimentally studied. The film thickness was measured using a fluorescent technique. It is demonstrated that, using periodic perturbations, it is possible to change the distance between rivulets with time. An increase in the wave amplitude at the front of a propagating perturbation has been observed. It is established that the wave amplitude growth and the liquid mass transfer across the flow lead to the washing of dry spots downstream the heater.

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Authors and Affiliations

  1. Kutateladze Institute of Thermal Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    E. A. Chinnov

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  1. E. A. Chinnov
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Correspondence to E. A. Chinnov.

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Original Russian Text © E.A. Chinnov, 2009, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2009, Vol. 35, No. 1, pp. 83–89.

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Chinnov, E.A. Nonstationary effect of artificial perturbations on a nonisothermal falling liquid film. Tech. Phys. Lett. 35, 40–42 (2009). https://doi.org/10.1134/S106378500901012X

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  • DOI: https://doi.org/10.1134/S106378500901012X

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