Direct Numerical Simulation of Rotating Cavity Flows Using a Spectral Element-Fourier Method
Pitz, Diogo B., Chew, John W., Marxen, Olaf and Hills, Nicholas J. (2017) Direct Numerical Simulation of Rotating Cavity Flows Using a Spectral Element-Fourier Method Journal of Engineering for Gas Turbines and Power: Transactions of the ASME, 139 (7), 072602.
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Abstract
in a rotor/stator cavity without heat transfer and buoyant flow in a rotor/rotor cavity. The numerical tool used employs a spectral element discretisation in two dimensions and a Fourier expansion in the remaining direction, which is periodic and corresponds to the azimuthal coordinate in cylindrical coordinates. The spectral element approximation uses a Galerkin method to discretise the governing equations, but employs high-order polynomials within each element to obtain spectral accuracy. A second-order, semi-implicit, stiffly stable algorithm is used for the time discretisation. Numerical results obtained for the rotor/ stator cavity compare favourably with experimental results for Reynolds numbers up to Re1 = 106 in terms of velocities and Reynolds stresses. The buoyancy-driven flow is simulated using the Boussinesq approximation. Predictions are compared with previous computational and experimental results. Analysis of the present results shows close correspondence to natural convection in a gravitational field and consistency with experimentally observed flow structures in a water-filled rotating annulus. Predicted mean heat transfer levels are higher than the available measurements for an air-filled rotating annulus, but in agreement with correlations for natural convection under gravity.
Item Type: | Article | |||||||||||||||
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Subjects : | Mechanical Engineering | |||||||||||||||
Divisions : | Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences | |||||||||||||||
Authors : |
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Date : | July 2017 | |||||||||||||||
DOI : | 10.1115/1.4035593 | |||||||||||||||
Copyright Disclaimer : | Copyright © 2017 by ASME | |||||||||||||||
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Depositing User : | Symplectic Elements | |||||||||||||||
Date Deposited : | 28 Oct 2016 07:09 | |||||||||||||||
Last Modified : | 06 Jul 2019 05:16 | |||||||||||||||
URI: | http://epubs.surrey.ac.uk/id/eprint/812647 |
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