Suppressing Rayleigh–Benard convection in a cube using a strong magnetic field — experimental heat transfer rate measurements and flow visualization

Bednarz, Tomasz P., Lei, Chengwang, Patterson, John C., and Hiroyuki, Ozoe (2009) Suppressing Rayleigh–Benard convection in a cube using a strong magnetic field — experimental heat transfer rate measurements and flow visualization. International Communications in Heat and Mass Transfer, 36 (2). pp. 97-102.

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Abstract

The average heat transfer rate of joint gravitational and magnetic convection of a paramagnetic fluid (an 80% mass aqueous solution of glycerol with 0.8 mol/kg concentration of gadolinium nitrate hexahydrate) in a cubic enclosure heated from below and cooled from above is experimentally measured for five different strengths of the magnetic field. The cubic enclosure of 0.032-m sides is placed in the bore of a 5-Tesla super-conducting magnet below the solenoid centre at a position where the magnetic force distribution is relatively uniform. The magnetic field imposed in the vertical direction acts against gravity and the heat transfer rate decreases with the increase of the magnetic induction. Furthermore, steady and transient states flow visualizations are carried out with a 10-Tesla super-conducting magnet to show a stable stratification obtained in the form of magneto-thermal.

Item ID: 11305
Item Type: Article (Refereed Research - C1)
Keywords: magnetic convection; Nusselt number; paramagnetic fluid; heat transfer rate; magnetic fluid
ISSN: 1879-0178
Date Deposited: 18 May 2010 07:02
FoR Codes: 09 ENGINEERING > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling @ 100%
SEO Codes: 86 MANUFACTURING > 8698 Environmentally Sustainable Manufacturing > 869899 Environmentally Sustainable Manufacturing not elsewhere classified @ 100%
Citation Count from Web of Science Web of Science 5
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