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Numerical study of a round jet impinging on an axisymmetric grooved surface: effect of the groove size

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Thermophysics and Aeromechanics Aims and scope

Abstract

The effects of the groove size on the dynamical and thermal behavior in a round jet impinging on an axisymmetric corrugated surface are investigated numerically. The geometry is similar to that considered in the experimental study Sagot et al. (2010, Inter J. Therm. Sci., 49, 1026–1030). Three side lengths of the square groove cross section are tested, 1/8, 1/4, and 3/8 of the jet diameter. A comparison is made with the flat plate case. The nozzle-to-plate distance is H = 2D, the Reynolds number is Re = 23000, and the ratio of the plate-radius to nozzle-diameter is R/D = 6. The SST k-ω model is employed to take account of turbulence effects. An attempt is made to understand thoroughly how key parameters such as mean velocity, turbulent kinetic energy, and temperature fields can influence the heat transfer performance. The local normal-to-wall temperature gradient and, thus, the local heat flux through the fluid/wall interface are strongly dependent on these parameters. This justifies our interest in analyzing the distributions of such determining factors in the wall jet and, particularly, in the recirculating zones inside the cavities. Their imprints on the friction coefficient and the local and averaged values of the Nusselt number are highlighted.

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Authors and Affiliations

  1. University of Mentouri Brothers, Constantine 1, Algeria

    A. Derdouri, Z. Nemouchi & A. Benhacine

  2. University de La Rochelle, La Rochelle, France

    K. Abed-Meraim & A. Sakout

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  1. A. Derdouri
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  2. Z. Nemouchi
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  3. A. Benhacine
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  4. K. Abed-Meraim
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  5. A. Sakout
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Correspondence to A. Derdouri.

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Derdouri, A., Nemouchi, Z., Benhacine, A. et al. Numerical study of a round jet impinging on an axisymmetric grooved surface: effect of the groove size. Thermophys. Aeromech. 27, 671–690 (2020). https://doi.org/10.1134/S0869864320050042

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  • DOI: https://doi.org/10.1134/S0869864320050042

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