Dynamic measurement of ferrofluid thermal conductivity under an external magnetic field

Ferrofluids prepared by dispersing superparamagnetic Fe3O4@C core–shell nanoparticles in water exhibited exceptional enhancement in thermal conductivity without an external magnetic field.

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Thermal conductivity in 3D NJL model under external magnetic field

The European Physical Journal B ◽

10.1140/epjb/e2003-00181-8 ◽

2003 ◽

Vol 33 (4) ◽

pp. 397-411 ◽

Cited By ~ 32

Author(s):

E. J. Ferrer ◽

V. P. Gusynin ◽

V. de la Incera

Keyword(s):

Magnetic Field ◽

Thermal Conductivity ◽

External Magnetic Field ◽

Njl Model

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Effect of external magnetic field on thermal conductivity and viscosity of magnetic nanofluids: a review

Materials Research Express ◽

10.1088/2053-1591/ab44e9 ◽

2019 ◽

Vol 6 (11) ◽

pp. 112003 ◽

Cited By ~ 8

Author(s):

Serkan Doganay ◽

Rahime Alsangur ◽

Alpaslan Turgut

Keyword(s):

Magnetic Field ◽

Thermal Conductivity ◽

External Magnetic Field ◽

Magnetic Nanofluids

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Anisotropic Thermal Transport in Magnetic Fluids

ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer, Volume 1 ◽

10.1115/mnhmt2009-18254 ◽

2009 ◽

Cited By ~ 2

Author(s):

Xiaopeng Fang ◽

Yimin Xuan ◽

Qiang Li

Keyword(s):

Magnetic Field ◽

Thermal Conductivity ◽

External Magnetic Field ◽

Magnetic Fluid ◽

Thermal Transport ◽

Present Method ◽

Field Direction ◽

Magnetic Field Direction ◽

The Magnetic Field ◽

Anisotropic Feature

The inhomogeneous morphology of magnetic fluid may appear in the presence of an external magnetic field, which shows the structure controllability of magnetic fluid and will lead to anisotropic thermal transport inside the magnetic fluid. Based on the microstructure of magnetic fluid and considering the effect of nanolayer, a model for the thermal conductivity of the magnetic fluid has been developed. The anisotropic thermal transport inside the magnetic fluid is investigated by the present method. The results show that in the presence of an external magnetic field the particles form chainlike clusters along the magnetic field direction, which leads to an increment in the thermal conductivity along the field direction and little change in the thermal conductivity perpendicular to the magnetic field direction. The thermal conductivity of magnetic fluid presents an anisotropic feature. With the increase of the magnetic field strength the chainlike clusters in the magnetic fluid becomes more obvious and the anisotropic feature of heat conduction in the fluids becomes more evident. Comparisons show that the results predicted by the present method are well coincident with the experimental data.

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MAGNETIC FIELD INDUCED GAP AND KINK BEHAVIOR OF THERMAL CONDUCTIVITY

Modern Physics Letters B ◽

10.1142/s0217984902003555 ◽

2002 ◽

Vol 16 (04) ◽

pp. 107-116 ◽

Cited By ~ 31

Author(s):

E. J. FERRER ◽

V. P. GUSYNIN ◽

V. DE LA INCERA

Keyword(s):

Magnetic Field ◽

Thermal Conductivity ◽

External Magnetic Field ◽

Critical Field ◽

Applied Magnetic Field ◽

Interaction Model ◽

Critical Magnetic Field ◽

Landau Levels

The thermal conductivity of a quasiparticle (QP) system described by a relativistic four-fermion interaction model in the presence of an external magnetic field is calculated. It is shown that, for narrow widths of quasiparticles, the thermal conductivity, as a function of the applied magnetic field, exhibits a kink behavior at a critical field B c ~ T2. The kink is due to the opening of a gap in the QP spectrum at a critical magnetic field B c and to the enhancement of the transitions between the zeroth and first Landau levels. Possible applications of the results are discussed.

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