Heat transfer enhancement in ferrofluids subjected to steady magnetic fields

Heat transfer augmentation using a magnetic fluid under the influence of a line dipole

“…The spatial description of the imposed magnetic field is absent Tangthieng et al [14] Numerical investigation. Considered both a uniform magnetic field and a spatially varying magnetic field produced by a permanent magnet.…”

“…Although such a field can be established in a laboratory, practical devices generally involve spatial variations in the field due to the finite size of the corresponding magnetic poles. A few researchers have considered spatially nonuniform magnetic fields, but they either did not completely represent the variation in the imposed field [7][8][9][10][11][12][13], or the descriptions were inaccurate [14][15][16] correlations between the magnetic field attributes and the resulting heat transfer for designing practical applications. Odenbach performed elegant experiments to demonstrate the influence of the thermomagnetic destabilization force in microgravity using an azimuthal magnetic field having a radial gradient (as one produced by a single current-carrying conductor) [17,18].…”

CFD simulation and evaluation of controllable parameters effect on thermomagnetic convection in ferrofluids using Taguchi technique

“…Several recent publications have established the potential of CFD for describing the ferrofluids behavior like fluid motion and heat transfer [2,[8][9][10]. The objective of this research was to develop a fundamental understanding of the hydrodynamics of ferrofluids in presence of thermomagnetic convection and considering the effects of various parameters that may effect on this phenomenon in a cylindrical geometry using Taguchi statistical method.…”

Finite Element Simulation of Heat Transfer in Ferrofluid

“…One approach suggested in literature is to replace the oil in such devices with oil-based ferrofluids, which can take advantage of the pre-existing leakage magnetic fields to enhance heat transfer processes. In paper (Tangthieng et al, 1999) authors present results of an initial study of the enhancement of heat transfer in ferrofluids in magnetic fields which are steady but variable in space. Finite element simulations of heat transfer to a ferrofluid in the presence of a magnetic field are presented for flow between flat plates and in a box.…”