The present study involves a 3D numerical investigation of rotating Rayleigh–Benard convection in a large aspect-ratio (8:8:1) rectangular enclosure. The rectangular cavity is rotated about a vertical axis passing through the center of the cavity. The governing equations of mass, momentum, and energy for a frame rotating with the enclosure, subject to generalized Boussinesq approximation applied to the body and centrifugal force terms, have been solved on a collocated grid using a semi-implicit finite difference technique. The simulations have been carried out for liquid metal flows having a fixed Prandtl number and fixed Rayleigh number while rotational Rayleigh number and Taylor number Ta are varied through nondimensional rotation rate ranging from 0 to . Generation of large-scale structures is observed at low-rotation rates though at higher-rotation rates the increase in magnitude of Coriolis forces leads to redistribution of buoyancy-induced vertical kinetic energy to horizontal kinetic energy. This brings about inhibition of vertical fluid transport, thereby leading to reduced vertical heat transfer. The magnitude of rms velocities remains unaffected with an increase in Coriolis forces from to . An increase in rotational buoyancy , at constant rotation rate , on variation in from to results in enhanced breakup of large-scale structures with a consequent decrease in rms velocities but with negligible reduction in vertical heat transport.
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Research Papers
Turbulent Rotating Rayleigh–Benard Convection: Spatiotemporal and Statistical Study
A. Husain,
A. Husain
Department of Mechanical Engineering,
Aligarh Muslim University
, Aligarh 202002, India
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M. F. Baig,
M. F. Baig
Department of Mechanical Engineering,
e-mail: drmfbaig@yahoo.co.uk
Aligarh Muslim University
, Aligarh 202002, India
Search for other works by this author on:
H. Varshney
H. Varshney
Department of Mechanical Engineering,
Aligarh Muslim University
, Aligarh 202002, India
Search for other works by this author on:
A. Husain
Department of Mechanical Engineering,
Aligarh Muslim University
, Aligarh 202002, India
M. F. Baig
Department of Mechanical Engineering,
Aligarh Muslim University
, Aligarh 202002, Indiae-mail: drmfbaig@yahoo.co.uk
H. Varshney
Department of Mechanical Engineering,
Aligarh Muslim University
, Aligarh 202002, IndiaJ. Heat Transfer. Feb 2009, 131(2): 022501 (10 pages)
Published Online: December 12, 2008
Article history
Received:
December 3, 2007
Revised:
August 7, 2008
Published:
December 12, 2008
Citation
Husain, A., Baig, M. F., and Varshney, H. (December 12, 2008). "Turbulent Rotating Rayleigh–Benard Convection: Spatiotemporal and Statistical Study." ASME. J. Heat Transfer. February 2009; 131(2): 022501. https://doi.org/10.1115/1.2993545
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