The benefit of transformer oil seeded with magnetic nanoparticles (forming a oil-based ferrofluid) is numerically studied in an axisymmetric model 40 kVA transformer. maximum temperature the system decreased by 2.2 °C when using ferrofluid instead oil. This effect mainly due to body force, which modifies convective flow and enhances heat transfer. leakage field highly localized limits thermomag...

this paper provides an overview of how the surface properties of ferromagnetic nanoparticles dispersed in fluids is modified by natural and biocompatible polymers. among common magnetic nanoparticles, magnetite (fe3o4) and maghemite (g-fe203) are popular candidates because of their biocompatibility. natural polymeric coating materials are the most commonly used biocompatible magnetic nanopartic...

Abstract The viscosity of ferrofluid has a vital role in liquid sealing the hard disk drives, biomedical applications as drug delivery, hyperthermia, and magnetic resonance imaging. theoretical expressions for its limitation are presented detail this article. A qualitative comparison experimental results is also shown. In absence field, depends on volume concentration nanoparticles, including s...

The aggregation of magnetic particles in the presence of a magnetic field is the basic phenomenon which underlies all the physics of magnetorheological (MR) fluids. Although these interactions are well understood when the suspending fluid is a simple liquid, new MR fluids based on dispersion of magnetic microparticles in a ferrofluid or MR elastomers based on dispersion of magnetic particles in...

The major focus of this article is to analyze the forced convective heat transfer in a steady boundary layer flow of Sisko fluid over a nonlinear stretching sheet. Two cases are studied, namely (i) the sheet with variable temperature (PST case) and (ii) the sheet with variable heat flux (PHF case). The heat transfer aspects are investigated for both integer and non-integer values of the power-l...

Steady shear flow properties of Acacia tortuosa gum aqueous dispersions at different concentrations (15–40% w/v) were studied at 20 C using a controlled shear rate Couette rheometer and Mooney–Ewart sensor systems. Flow curves showed shear thinning non-Newtonian behaviour with a tendency to a Newtonian plateau at high-shear rate. The results obtained fitted the Sisko model very well. The influe...

PURPOSE To present a novel design of an implantable glaucoma valve based on ferrofluidic nanoparticles and to compare it with a well-established FDA approved valve. SETTING Massachusetts Eye & Ear Infirmary, Boston, USA. METHODS A glaucoma valve was designed using soft lithography techniques utilizing a water-immiscible magnetic fluid (ferrofluid) as a pressure-sensitive barrier to aqueous ...

Ferrofluid Bubble Formation In article number 2201724 by Kangqi Liu, Yuan Gao, Duyang Zang, and colleagues, a ferrofluid drop was turned into bubble in controlled manner coupling the effect of magnetic sound fields. The acoustically levitated can serve as an ideal template for evaporation-induced assembly.

This paper proposes a needle-type giant magnetoresistance (GMR) sensor for very low magnetic fluid weight density of ferrofluid estimation. The magnetic fluids or ferrofluids due to their biocompatibility are used for various applications in medicine such as cancer treatment, magnetic resonance imagining (MRI), cell separation and also to detect the bacteria. The high sensitivity of GMR sensor ...