Ferrofluid Applications in Chemical Engineering
نویسندگان
چکیده
Ferrofluids have been vastly wooed in diverse areas of engineering and research. This contribution briefly exposes some concepts specific to ferrofluids and how they relate to recent applications emerging in chemical engineering, including mass transfer enhancement, momentum transfer in laminar and turbulent pipe flows and in porous media flows, and the motion of magnetic nanoparticles in gas-liquid mass transfer mechanisms with/without external magnetic fields. The noticeable effects of magnetic fields on ferrofluid flow behavior will be surveyed as well as a discussion about common assumptions to simplify and solve some ferrohydrodynamic models. With respect to the intriguing features caused by dispersed magnetic nanoparticles on ferrofluid behavior, considerable theoretical and experimental work is left for mining new opportunities in chemical engineering on the subject of ferrofluid interactions between magnetic fields, mass, heat, and momentum transfer phenomena. Copyright © 2009 Praise Worthy Prize S.r.l. All rights reserved.
منابع مشابه
CFD Investigation of Gravitational Sedimentation Effect on Heat Transfer of a Nano-Ferrofluid
In the present attempt, flow behavior and thermal convection of one type of nanofluids in a disc geometry was investigated using Computational Fluid Dynamics (CFD). Influence of gravity induced sedimentation also has been studied. The commercial software, Fluent 6.2, has been employed to solve the governing equations. A user defined function was added to apply a uniform external ma...
متن کاملCooling Enhancement of a Photovoltaic Panel Through Ferrofluid Stimulation Using a Magnetic-Wind Turbine
Wind energy is used to rotate a magnetic turbine in order to remove heat from the surface of a photovoltaic (PV) panel. A three-bladed turbine, which rotates with wind energy, has rotational motion underneath the studied PV panel in order to move Magnetic Nano-Particles (MNPs). In addition, effects of the magnetic field strength (B=450-830 mT), rotational velocity of the magnetic turbine (ω), a...
متن کاملRheological Study of Nickel Ferrite Ferrofluid
In this work, a stable NiFe2O4 paraffin based ferrofluid was prepared via high energy milling. The rheological properties of ferrofluid were studied. Bingham plastic, HerschelBulkley and Casson models were used to evaluate the shear stress-shear rate dependency. The ferrofluid exhibited a shear thinning behaviour for all studied magnetic field. The magneto-viscous effect and thixotropy of...
متن کاملExperimental Study on the Effect of Magnetic Field on Critical Heat Flux of Ferrofluid Flow Boiling in a Vertical Tube
In the present work, the critical heat flux measurements were performed for the subcooled flow boiling of pure water and magnetic nanofluids (i.e., water + 0.01 and 0.1 vol.% Fe3O4) in a vertical tube. The effect of applying an external magnetic field on the CHF variation was studied experimentally as well. The obtained results indicated that the subcooled flow boiling CHF in the vertical tub...
متن کاملApplications of Ferro-Nanofluid on a Micro-Transformer
An on-chip transformer with a ferrofluid magnetic core has been developed and tested. The transformer consists of solenoid-type coil and a magnetic core of ferrofluid, with the former fabricated by MEMS technology and the latter by a chemical co-precipitation method. The performance of the MEMS transformer with a ferrofluid magnetic core was measured and simulated with frequencies ranging from ...
متن کامل