Ferrofluids and magnetically guided superparamagnetic particles in flows: a review of simulations and modeling

@article{Afkhami2017FerrofluidsAM,
  title={Ferrofluids and magnetically guided superparamagnetic particles in flows: a review of simulations and modeling},
  author={Shahriar Afkhami and Yuriko Renardy},
  journal={Journal of Engineering Mathematics},
  year={2017},
  volume={107},
  pages={231-251}
}
Ferrofluids are typically suspensions of magnetite nanoparticles, and behave as a homogeneous continuum. The ability of the ferrofluid to respond to an external magnetic field in a controllable manner has made it emerge as a smart material in a variety of applications, such as seals, lubricants, electronics cooling, shock absorbers and adaptive optics. Magnetic nanoparticle suspensions have also gained attraction recently in a range of biomedical applications, such as cell separation… 

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References

SHOWING 1-10 OF 86 REFERENCES

Particle Transport in Therapeutic Magnetic Fields

TLDR
This review explains the behavior of magnetic nano- and microparticles during magnetic drug targeting and magnetic fluid hyperthermia, and the microfluidic transport of these particles in bioMEMS (biomedical microelectromechanical systems) devices for ex vivo therapeutic and diagnostic applications.

Interfacial instability of thin ferrofluid films under a magnetic field

Abstract We study magnetically induced interfacial instability of a thin ferrofluid film subjected to an applied uniform magnetic field and covered by a non-magnetizable passive gas. Governing

Modeling Superparamagnetic Particles in Blood Flow for Applications in Magnetic Drug Targeting

Magnetic drug targeting is a technique that involves the binding of medicine to magnetizable particles to allow for more specific transport to the target location. This has recently come to light as

Thin viscous ferrofluid film in a magnetic field

We consider a thin, ferrofluidic film flowing down an inclined substrate, under the action of a magnetic field, bounded above by an inviscid gas. Its dynamics are governed by a coupled system of the

Magnetic Biotransport: Analysis and Applications

TLDR
This review discusses the use of magnetic nanoparticles as transport agents in various bioapplications, and presents two different transport models: a classical Newtonian model for predicting the motion of individual particles, and a drift-diffusion model for predicted the behavior of a concentration of nanoparticles that takes into account Brownian motion.

Understanding the dynamics of superparamagnetic particles under the influence of high field gradient arrays

TLDR
The results indicated that magnetic arrays that emit a strong magnetic force that varies rapidly over a confined spatial range are the most suitable for concentrating magnetic particles in a localized region.

Deformation of a hydrophobic ferrofluid droplet suspended in a viscous medium under uniform magnetic fields

The effect of applied magnetic fields on the deformation of a biocompatible hydrophobic ferrofluid drop suspended in a viscous medium is investigated numerically and compared with experimental data.

On the motion of superparamagnetic particles in magnetic drug targeting

A stochastic ODE model is developed for the motion of a superparamagnetic cluster suspended in a Hagen-Poiseuille flow and guided by an external magnet to travel to a target. The specific application

Dynamics of ferrofluid drop deformations under spatially uniform magnetic fields

We systematically study the shape and dynamics of a Newtonian ferrofluid drop immersed in an immiscible, Newtonian and non-magnetic viscous fluid under the action of a uniform external magnetic
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