The transition from natural convection to thermomagnetic convection of a magnetic fluid in a non-uniform magnetic field

Peter Szabo, Wolf-Gerrit Früh

Research output: Contribution to journalArticle

18 Citations (Scopus)
53 Downloads (Pure)

Abstract

Magnetic fluid flow and heat transfer by natural and thermomagnetic convection was studied numerically in a square enclosure. The aim was to investigate the transition from natural convection to thermomagnetic convection by exploring situations where buoyancy and the Kelvin body force would be opposing each other such that the magnetic effects would in some cases be the dominant factor throughout the domain and in other cases only in a part of the fluid. The numerical model coupled the solution of the magnetostatic field equation with the heat and fluid flow equations to simulate the fluid flow under a realistic magnetic field generated by a permanent magnet. The results suggest that the domain of influence over the flow field is largely aligned with the domain of dominance of the respective driving force. The result is that the transition from a single buoyancy-driven convection cell to a single thermomagnetically driven cell is via a two-cell structure and that the local effect on the flow field leads to a global effect on the heat transfer with a minimum of the Nusselt number in the transition region.
Original languageEnglish
Pages (from-to)116-123
Number of pages8
JournalJournal of Magnetism and Magnetic Materials
Volume447
Early online date12 Sep 2017
DOIs
Publication statusPublished - 1 Feb 2018

Fingerprint Dive into the research topics of 'The transition from natural convection to thermomagnetic convection of a magnetic fluid in a non-uniform magnetic field'. Together they form a unique fingerprint.

  • Cite this