Thermophysical Characteristics of the Ferrofluid in a Vertical Rectangle

Title
Thermophysical Characteristics of the Ferrofluid in a Vertical Rectangle
Author(s)
이동연J. Seo[J. Seo]b. You[b. You]S. Kweon[S. Kweon]M. Lee[M. Lee]
Keywords
MAGNETIC-FIELD; NATURAL-CONVECTION; HEAT-TRANSFER; POROUS-MEDIUM; ENCLOSURE; FLUIDS; NANOFLUID; CAVITY
Issue Date
201502
Publisher
MDPI AG
Citation
ENTROPY, v.17, no.2, pp.903 - 913
Abstract
The article aimed to analytically investigate the thermophysical behaviors of a ferrofluid in a vertical rectangle with the variation of intensity of the magnetic field, viscosity of the ferrofluid and boundary conditions. The governing equations of the ferrofluid include the continuity, momentum and energy equations for describing the thermal-fluidic behaviors of the ferrofluid and the Maxwell equation and magnetization equation are also added to consider rotating effect of the nano-sized particles. The flow behavior and heat transfer characteristics of the ferrofluid with the intensity of the magnetic field, viscosities of the ferrofluid and boundary conditions were analyzed through isotherms, velocity profiles and both mean and local Nusselt numbers. As a result, the isotherms of the ferrofluid in the vertical rectangle increased with the increase of the magnetic volume fractions and magnetic field intensities. In addition, the mean Nusselt numbers increased with the increase of magnetite volume fractions at all magnetic field intensities because of the combined effects of both heat conduction by magnetite and the magnetic volume force.
URI
http://hdl.handle.net/YU.REPOSITORY/33418http://dx.doi.org/10.3390/e17020903
ISSN
1099-4300
Appears in Collections:
공과대학 > 기계공학부 > Articles
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