A mean-field Fokker-Planck equation approach to the dynamics of ferrofluids in the presence of a magnetic field and velocity gradients is proposed that incorporates magnetic dipole-dipole interactions of the colloidal particles. The model allows to study the combined effect of a magnetic field and dipolar interactions on the viscosity of the ferrofluid. It is found that dipolar interactions lea...

In dilute astrophysical plasmas, the collisional mean free path of a particle can exceed its Larmor radius. Under these conditions, the thermal conductivity and viscosity of the plasma can be dramatically altered. This alteration allows outwardly decreasing angular velocity or temperature gradients to become strongly destabilizing. This paper generalizes an earlier, simple analysis of the visco...

Suspensions of magnetic particles with diameters in the nanometer range exhibit longterm sedimentation stability as well as the possibility of magnetic field induced control of their properties and flow. One of the most famous field induced effects is the change of viscosity of the fluids due to the action of magnetic influences. An explanation of these effects on basis of microscopic models is...

This article presents the results of a study on dynamics volume magnetic fluid levitating in uniform field an electromagnet experiencing oscillatory shift. Samples with different physical parameters were considered, and dependence magnetoviscous effect was studied. It showed that greatest influence experiences vibrational-shear magnetic-viscosity effects is exerted by sample microstructure pres...

Magnetic liquids are a kind of nano-scale functional material with fluidity and superparamagneticity, which is mainly composed nano-magnetic particles, base surfactants. Its characteristics include magnetization, levitation, magnetoviscous effect. Compared the traditional vibration damper, damper used in spacecraft based on these features has peculiarity small volume, low quality, sensitive to ...

In this article, a full-scale computational model for fluid–particle interaction under magnetic field is developed. model, the fluid solved by lattice Boltzmann method, and hydrodynamic force acting on particle computed immersed boundary method . The numerical solutions of in fluid–solid domain are achieved interface with finite difference scheme, which normal tangential jump conditions intensi...

Abstract Rheological properties are the theoretical basis and key to common problems in ferrofluid applications, therefore they expected be adjustable satisfy different technical requirements through altering microstructure of during process preparation. In this paper, Four samples with magnetic particle size were prepared by controlling concentration precursor solution co-precipitation rheolog...