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Shear/Buoyancy Interaction in Wall Bounded Turbulent Flows

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Progress in Turbulence VIII (iTi 2018)

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Abstract

In this paper we describe and compare two unstably stratified turbulent flows in a channel forced by pressure gradient and wall shear, respectively, with the aim of evidencing similarities and differences in the heat transfer and flow dynamics. In both cases we find that the combination of the mean flow with the thermal forcing produces an increase of the friction coefficient and a non–monotonic dependence of the heat transfer on the mean flow strength. This behaviour might be relevant for the prediction of the light–wind conditions in weather forecast or, more in general, for mixed convection applications.

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Acknowledgements

The authors wish to thank the computing centre CSCS for the support of the present study under the projects s713, s802, s874 “Sheared Rayleigh–Bénard Convection - Towards the Ultimate Regime of Turbulence”.

Author information

Authors and Affiliations

  1. PoF, University of Twente (NL), Enschede, The Netherlands

    A. Blass & R. Verzicco

  2. DIMA, Sapienza University of Rome (IT), Rome, Italy

    S. Pirozzoli

  3. DII, University of Rome Tor Vergata (IT), Rome, Italy

    R. Verzicco

Authors
  1. A. Blass
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  2. S. Pirozzoli
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  3. R. Verzicco
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Corresponding author

Correspondence to R. Verzicco .

Editor information

Editors and Affiliations

  1. Linné Flow Centre, KTH Mechanics, Stockholm, Sweden

    Ramis Örlü

  2. Department of Industrial Engineering, Universita' di Bologna, Forli, Italy

    Alessandro Talamelli

  3. ForWind and Institute of Physics, AG TWiSt—Turbulence, Wind Energy and Stochastics, Carl-von-Ossietzky University Oldenburg, Oldenburg, Germany

    Joachim Peinke

  4. Department of Mechanical Engineering, Chair of Fluid Dynamics, TU Darmstadt, Darmstadt, Germany

    Martin Oberlack

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Blass, A., Pirozzoli, S., Verzicco, R. (2019). Shear/Buoyancy Interaction in Wall Bounded Turbulent Flows. In: Örlü, R., Talamelli, A., Peinke, J., Oberlack, M. (eds) Progress in Turbulence VIII. iTi 2018. Springer Proceedings in Physics, vol 226. Springer, Cham. https://doi.org/10.1007/978-3-030-22196-6_8

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