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Effect of a Passive Disturbance on the Flow Structure and Heat Transfer in the Separation Region Behind a Backward-Facing Step

  • HEAT AND MASS TRANSFER AND PHYSICAL GASDYNAMICS
  • Published:
High Temperature Aims and scope

Abstract

The article presents the results of a numerical study of a separated, turbulent flow and heat transfer in a channel with a sudden expansion under the effect of a passive disturbance generated by a rib-vortex generator. The rib height and its position upstream of the backward-facing step were varied over a wide range. The simulation results demonstrated that the vortex generator exerted a strong effect on the turbulent energy field and the friction factor. Under these conditions, the heat-transfer coefficient changes only slightly, which indicates that the heat transfer has a very low sensitivity to the disturbances generated by the rib. The causes of this behavior of dynamic and thermal characteristics are discussed. The presented comparison of the predictions with the experimental data confirms their qualitative agreement.

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Funding

The work was financially supported by the Russian Science Foundation, project no. 18-19-00161.

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Authors and Affiliations

  1. Novosibirsk State University, Novosibirsk, Russia

    A. V. Barsukov & V. V. Terekhov

  2. Kutateladze Institute of Thermophysics, Siberian branch, Russian Academy of Sciences, Novosibirsk, Russia

    V. V. Terekhov & V. I. Terekhov

Authors
  1. A. V. Barsukov
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  2. V. V. Terekhov
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  3. V. I. Terekhov
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Corresponding author

Correspondence to A. V. Barsukov.

Additional information

Translated by T. Krasnoshchekova

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Barsukov, A.V., Terekhov, V.V. & Terekhov, V.I. Effect of a Passive Disturbance on the Flow Structure and Heat Transfer in the Separation Region Behind a Backward-Facing Step. High Temp 59, 115–120 (2021). https://doi.org/10.1134/S0018151X21010028

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  • DOI: https://doi.org/10.1134/S0018151X21010028

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