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Enhanced and reduced natural convection using magnetic fluid in a square cavity
Author(s) -
Szabo Peter S. B.,
Früh WolfGerrit
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610314
Subject(s) - natural convection , buoyancy , rayleigh number , nusselt number , magnet , mechanics , square (algebra) , heat transfer , materials science , physics , reynolds number , geometry , mathematics , turbulence , quantum mechanics
Natural convection using a magnetic fluid was studied in a square cavity under the influence of a permanent magnet. The aim was to explore the degree by which heat transfer may be controlled, enhanced or reduced, by investigating a set of different distances of a permanent magnet to the cavity. These distances of the magnet were set such that the cavity was in some cases fully dominated by buoyancy or by the magnetic body force and in other cases partly dominated by either of both body forces in different parts of the fluid. The effect on heat transfer was characterised by an averaged Nusselt number, Rayleigh and magnetic Rayleigh number. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)