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Shear-Driven Flow of Locally Heated Viscous Liquid Film in a Minichannel

  • Topical Issue Two-Phase Systems Italy
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Abstract

This paper considers a flow of a liquid sheared by gas in a flat mini-channel with two identical heaters arranged in a row one after another in a streamwise direction at the bottom wall. The present study is focused on the investigation of influence of local heaters arrangement and size on thermocapillary deformations in a viscous film, gravity effect is also investigated. 3D one-sided model is considered, viscosity of the liquid is supposed to be temperature dependent. Numerical analysis reveals that interaction and mutual influence of 3D structures takes place. Film pattern changes qualitatively depending on the heaters arrangement and form. For rectangular heaters a middle stream exists. Minimum film thickness value increases and its location moves to heater edges for rectangular heaters. A critical backlash between two heaters, at which film thinning is the largest, exists. Gravity significantly affects on the film deformations. Decreasing of gravity level leads to a flow destabilization and film deformations, especially film thinning, essentially increases.

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Authors and Affiliations

  1. Center of Smart Interfaces, TU Darmstadt, Petersenstr. 32, 64287, Darmstadt, Germany

    Yulia O. Kabova & O. A. Kabov

  2. Institute of Thermophysics, SB RAS, prosp. Lavrentyev 1, Novosibirsk, 630090, Russia

    Yulia O. Kabova & O. A. Kabov

  3. Lavrentyev Institute of Hydrodynamics, SB RAS, pr. Lavrentyev 15, Novosibirsk, 630090, Russia

    V. V. Kuznetsov

  4. Universite Libre de Bruxelles, Chimie-Physique EP-CP165/62, Microgravity Research Center, Avenue F.D. Roosevelt 50, Brussels, 1050, Belgium

    O. A. Kabov

Authors
  1. Yulia O. Kabova
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  2. V. V. Kuznetsov
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  3. O. A. Kabov
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Correspondence to Yulia O. Kabova.

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Kabova, Y.O., Kuznetsov, V.V. & Kabov, O.A. Shear-Driven Flow of Locally Heated Viscous Liquid Film in a Minichannel. Microgravity Sci. Technol. 23 (Suppl 1), 105–112 (2011). https://doi.org/10.1007/s12217-011-9277-2

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  • DOI: https://doi.org/10.1007/s12217-011-9277-2

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