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On the effect of the aspect ratio on the mixed convection in a vertical cylindrical cavity with rotating inner wall

Fichera, Alberto and Marcoux, Manuel and Pagano, Arturo On the effect of the aspect ratio on the mixed convection in a vertical cylindrical cavity with rotating inner wall. (2017) Journal of Physics: Conference Series, 923 (1). ISSN 1742-6588

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Official URL: https://doi.org/10.1088/1742-6596/923/1/012051

Abstract

The thermal fluidynamic behaviour of a variety of fluids filling either vertical cylinders or vertical annuli under external conditions giving rise to natural convective motions has been thoroughly investigated, both experimentally and numerically, because of the several possible engineering applications that can be well approximated and described by these kinds of configurations. This study aims at investing through a numerical analysis the mixed convection arising inside cavities formed between two horizontal adiabatic disks and two isothermally and differentially heated vertical cylindrical walls, one of which is rotating. Previous studies reported and discussed the role played by both the Rayleigh number the Reynolds number for the case of the rotation of either the inner or the external wall and for a specified geometry of the cavity. The focus of the present study is to analyse the role played by the aspect ratio, A=H/(Re-Ri), for the case of rotating inner cylinder. It is reported that this role is particular relevant with respect to the flow structures established within the cavity and, as a consequence, also with respect to the Nusselt number.

Item Type:Article
Additional Information:Licence CC-BY
HAL Id:hal-02110870
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Università degli Studi di Catania (ITALY)
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Deposited On:25 Apr 2019 13:57

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