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Numerical and Experimental Study of Rayleigh-Benard-Kelvin Convection

Numerical and Experimental Study of Rayleigh-Benard-Kelvin Convection, S. Kenjeres, L. Pyrda, E. Fornalik-Wajs, and J. S. Szmyd. Flow Turbulence and Combustion 2014, 92  (1-2, SI), 371–393.

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Abstract

We performed experimental and numerical studies of combined effects of thermal buoyancy and magnetization force applied on a cubical enclosure of a paramagnetic fluid heated from below and cooled from top. The temperature difference between the hot and cold wall was kept constant. After considering neutral situation (i.e. a pure natural convection case), magnetic fields of different intensity were imposed. The magnetization force produced significant changes in flow (transition from laminar to turbulent regimes), wall-heat transfer (enhancement) and turbulence (turbulence structures reorganization). The strong magnetic field and its gradients were generated by a superconducting magnet which can generate magnetic field up to 10 T and where gradients of the magnetic induction can reach up to 900 T-2/m. A good agreement between experiments and numerical simulations was obtained in predicting the integral wall heat transfer over entire range of considered working parameters. Numerical simulations provided a detailed insights into changes of the local wall-heat transfer and long-term time averaged first and second moments for different strengths of the imposed magnetic induction.

BibTeX

@article{ ISI:000328844400018,
Author = {Kenjeres, S. and Pyrda, L. and Fornalik-Wajs, E. and Szmyd, J. S.},
Title = {Numerical and Experimental Study of Rayleigh-Benard-Kelvin Convection},
Journal = {Flow Turbulence and Combustion},
Year = {2014},
Volume = {92},
Number = {1-2, SI},
Pages = {371-393},
Month = {},
Abstract = {We performed experimental and numerical studies of combined effects of thermal buoyancy and magnetization force applied on a cubical enclosure of a paramagnetic fluid heated from below and cooled from top. The temperature difference between the hot and cold wall was kept constant. After considering neutral situation (i.e. a pure natural convection case), magnetic fields of different intensity were imposed. The magnetization force produced significant changes in flow (transition from laminar to turbulent regimes), wall-heat transfer (enhancement) and turbulence (turbulence structures reorganization). The strong magnetic field and its gradients were generated by a superconducting magnet which can generate magnetic field up to 10 T and where gradients of the magnetic induction can reach up to 900 T-2/m. A good agreement between experiments and numerical simulations was obtained in predicting the integral wall heat transfer over entire range of considered working parameters. Numerical simulations provided a detailed insights into changes of the local wall-heat transfer and long-term time averaged first and second moments for different strengths of the imposed magnetic induction.},
DOI = {10.1007/s10494-013-9490-8},
ISSN = {1386-6184},
EISSN = {1573-1987},
ResearcherID-Numbers = {Fornalik-Wajs, Elzbieta/C-6551-2013},
Unique-ID = {ISI:000328844400018},
}

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