Numerical study of buoyancy convection of air under permanent magnetic field and comparison with that under gravity field
type: Item
instance of: scholarly article
title: Numerical study of buoyancy convection of air under permanent magnetic field and comparison with that under gravity field
zbMATH Open document ID: 1407.76143
DOI: 10.1155/2014/494585
author: Wenkai Li
author: Yang Zhou
author: Yuanru Lu
author: Kewei Song
published in: Mathematical Problems in Engineering
publication date: 2019-02-08T00:00:00Z
review text: Summary: Magnetothermal free convection of air in a square enclosure under a nonuniform magnetic field provided by a permanent neodymium-iron-boron magnet is numerically studied. The natural convection under the gravity field alone is also studied for comparison. The physical fields of magnetizing force, velocity, and temperature as well as the local distribution characteristic of Nusselt number are all presented in this paper. The results show that the buoyancy convection of air in the square enclosure under magnetic field is quite different from that under the gravity field. The local value of Nusselt number under the magnetic field supplied by a permanent magnet with a residual magnetic flux density of about 4.5 Tesla can reach a high value of about three times larger than the maximum local value of Nusselt number under the gravity field. Relatively uniform distributions of temperature gradient and Nusselt number can be obtained along the cold wall of the enclosure under the magnetic field. A permanent magnet with high magnetic energy product with \(B_r\) reaching to 3.5 Tesla can play a comparative role on the averaged Nusselt number compared with that under the gravity environment.
Mathematics Subject Classification ID: 76R10
Mathematics Subject Classification ID: 76W05
zbMATH DE Number: 7016580
Wikidata QID: Q59067844
MaRDI profile type: Publication
full work available at URL: https://doi.org/10.1155/2014/494585
OpenAlex ID: W2068296697
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description: scientific article; zbMATH DE number 7016580