Experimental investigation on convection heat transfer characteristics of ferrofluid in a horizontal channel under a non-uniform magnetic field

Heat transfer enhancement of Fe 3 O 4 ‐water nanofluid by the thermo‐magnetic convection and thermophorestic effect

“…Besides, we compared the results of present model for Fe 3 O 4 ‐water nanofluid with the experimental results in Ref. [21] and found, the maximum error is less than 4.87%. That is, present model can predict the experimental results more precisely than Shah formula.…”

“…Moreover, more publications for heat transfer enhancement under an external magnetic field arose in recent years. For example, the thermal efficiency for the solar collector was experimentally studied when a nonuniform magnetic field was applied in ferrofluid flow 21 . A total of 26.8% promotion in collector's efficiency can be realized comparing to that for no magnetic field.…”

“…For example, the thermal efficiency for the solar collector was experimentally studied when a nonuniform magnetic field was applied in ferrofluid flow. 21 A total of 26.8% promotion in collector's efficiency can be realized comparing to that for no magnetic field. Mehrez 22 numerically studied the forced convection of ferrofluid in a rectangular microchannel under an inhomogeneous magnetic field.…”

Effect of a Magnetic Field on Mixed Convection in a Rectangular Cavity Filled with Ferrofluid

“…They found that the vertical magnetic field has a destabilizing effect on the flow transition as the critical Rayleigh number decreased when the field is applied. Cheng and Li [13] studied the heat transfer characteristics of diester-based ferrofluid natural convection in a horizontal channel under a permanent magnetic fluid. On the other hand, Bian et al [14] considered an inclined rectangular porous enclosure saturated with an electrically conducting fluid to examine the outcome on buoyancy-driven convection when subjected to a transverse magnetic field.…”

Experimental Study on Thermal Conductivity and Magnetization Behaviors of Kerosene-Based Ferrofluid Loaded with Multiwalled Carbon Nanotubes

“…In high-speed ferrofluid seals, ferrofluid in the sealing gap is heated on account of viscous dissipation, which can lead to evaporation of the carrier fluid, decrease in magnetization of ferrofluid, and aggregation of magnetic nanoparticles (MNPs). Furthermore, the performances of high-speed ferrofluid seals deteriorate. , Based on these, two methods, the improvements of ferrofluid’s thermophysical properties and structure designs of ferrofluid sealing devices, have been proposed to lower the temperature of ferrofluid in the sealing gap. Many studies concentrate on the structure designs improvement, such as the design of cooling channels, adjusting number of sealing stages, adjusting height of the sealing gap, and so on. , However, the improvement of structure designs often leads to the complexity of the ferrofluid seals and the reduction of load-bearing capacity of shaft.…”