A 3D numerical simulation of mixed convection of a magnetic nanofluid in the presence of non-uniform magnetic field in a vertical tube using two phase mixture model

Numerical study of non-uniform magnetic fields effects on subcooled nanofluid flow boiling

“…1a and b). Although the magnetic field affects viscosity and thermal conductivity of the ferrofluid, these effects can be assumed negligible (Aminfar et al, 2011). Properties of the studied materials are presented in Table 3.…”

“…In the literature, there are many investigations which were carried out in the field of thermomagnetic convection of the ferrofluids for different geometries in the presence of an external magnetic field (Kikura et al, 1993;Yamaguchi et al, 1999;Wen et al, 2002;Krakov and Nikiforov, 2002;Yamaguchi et al, 2002;Snyder et al, 2003;Wen and Su, 2005;Jafari et al, 2008;Aminfar et al, 2011Aminfar et al, , 2012Aminfar et al, , 2013. They presented that the heat transfer capabilities of the magnetic fluids were changed by both the intensity of external magnetic field and temperature gradient.…”

“…They presented that the heat transfer capabilities of the magnetic fluids were changed by both the intensity of external magnetic field and temperature gradient. For example, Aminfar et al( 2011Aminfar et al( , 2012Aminfar et al( , 2013 studied the effect of magnetic field with different gradients on the single-phase heat transfer characteristics of ferrofluids. The obtained results indicated the strong magnetic field effect on single-phase hydro-thermal behavior.…”

Effect of Magnetic Field on Entropy Generation in a Microchannel Heat Sink with Offset Fan Shaped

“…The advantage of the use of ferrofluids is that both fluid flow and heat transfer can be controlled by external magnetic fields [10]. Aminfar et al [11,12] numerically studied the effects uniform and non-uniform magnetic field on hydrothermal behaviors in a vertical pipe and square duct with using two-phase mixture model. Their result indicated that the positive gradient axial field decreases the Nusselt number and the friction factor; but the negative gradient axial field and uniform transverse field enhance these numbers.…”

Effect of particle migration on flow and heat transfer characteristics of magnetic nanoparticle suspensions

“…Yu et al [35] investigated the kerosene based Fe 3 O 4 nanofluids and oleic acid and achieved a 34% rise in thermal conductivity at concentration of 1%. Aminfar et al [36] reported the hydrodynamics and thermal behavior of a magnetic nanofluid (kerosene and 4 vol.% Fe 3 O 4 ) in a vertical tube under the effect of a non-uniform magnetic field using the two-phase mixture model. They concluded that the magnetic field with negative gradient acts similar to buoyancy force and augments the Nusselt number, while the magnetic field with positive gradient decreases it.…”