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Numerical Study of Buoyancy-Driven Flow in a Closed Rotating Annulus

Gao, Feng, Chew, John W. and Pitz, Diogo B. (2019) Numerical Study of Buoyancy-Driven Flow in a Closed Rotating Annulus In: Global Power and Propulsion Society 2019 (GPPS 19), 16-18 Sep 2019, Beijing, China.

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This paper presents a numerical investigation of buoyancy-driven flow in a closed rapidly rotating disc cavity. Pseudo two-dimensional models are considered, with periodic boundary conditions on a thin axial domain. An incompressible model, in which density variation is considered with the Boussinesq approximation, is evaluated through comparisons with a full compressible model. Effects of property (viscosity) variation and dependency on buoyancy parameter (ßT) and rotational Reynolds number for a given Rayleigh number, are investigated with the full compressible model. The mean centrifugal and radial Coriolis forces are analysed. Heat transfer predictions from the Boussinesq and compressible models agree to within 10%, for ßT ≤ 0.2.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Chew, John
Pitz, Diogo B.
Date : 2019
Funders : Engineering and Physical Sciences Research Council (EPSRC)
Copyright Disclaimer : © 2019 the authors. This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC). See:
Related URLs :
Depositing User : Clive Harris
Date Deposited : 14 Aug 2019 08:40
Last Modified : 14 Aug 2019 08:50

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