A ferroparticle in a magnetizable disperse medium made up of particles of a like nature: Specific aspects of susceptibility determination

Sandulyak, A. V.; Sandulyak, D. A.; Ershova, V. A.; Polismakova, M. N.

doi:10.1016/j.jmmm.2019.165365

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Previous studies suggested that the magnetic susceptibility of the dispersive media linearly depends on the particle concentration for relatively small volume fractions (~<0.2) (Sandulyak et al 2019;Sandulyak et al 2017). According to these studies, at this concentration the distance between the nanoparticles are sufficiently long to prohibit mutual magnetic effect.…”

Section: Numerical Modellingmentioning

confidence: 99%

Magnetofluidic spreading in circular chambers under a uniform magnetic field

Maleki

Zhang

Kashaninejad

et al. 2020

Microfluid Nanofluid

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Elucidating the microscale interaction between magnetism and fluid flow is of great importance for designing micro-magnetofluidic gradient generators, micromixers, and particle sorters. Coflowing magnetic and non-magnetic fluids can lead to instability at their interface and subsequent rapid mixing. The mismatch in the magnetisation of the fluids leads to instabilities. The present study systematically investigates the magnetofluidic spreading phenomena of both magnetic nanoparticles and non-magnetic fluorescent dye in consecutive circular chambers. Numerical simulations and experimental investigations were conducted to thoroughly evaluate the physics of magnetofluidic spreading. We show that the presence of the consecutive chambers can enhance magnetofluidic spreading by slowing down the flow and increasing the mass transfer rate transversal to the flow direction. The numerical results reveal that the magnetic force, induced by the magnetic susceptibility gradient, generates cross-sectional secondary flows that steer particles toward both the top and bottom walls. The induced secondary flow also enhances the transport of fluorescent dye, thereby leading to a higher mass transfer rate as compared to pure molecular 2 diffusion. The findings provide further insights into the microscale spreading phenomenon of magnetic and non-magnetic particles in a magnetic field.

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Section: Numerical Modellingmentioning

confidence: 99%

Magnetofluidic spreading in circular chambers under a uniform magnetic field

Maleki

Zhang

Kashaninejad

et al. 2020

Microfluid Nanofluid

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Characteristics of magnetic parameters of granular samples with various relative length

Sandulyak

Ershova

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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The experimental data of magnetic flux and induction in ferromagnetic granular samples (filling of balls with 8mm diameter in a cylindrical container with diameter D = 40mm) have been obtained with various relative lengths of samples L/D = 1-16 in a magnetizing field with strength range H = 9.4-47.2kA/m. These data have been used to determine the corresponding dependencies families of magnetic permeability, susceptibility, and magnetization, as well as the demagnetizing factor data of such samples. The absence of magnetic saturation of granular (as opposed to solid) magnetics in the considered range H has been revealed (by analyzing the trend of induction field dependencies and especially magnetization). From the experiment, it is evident that in this range H field dependencies of such parameters, as magnetic permeability and susceptibility demonstrate weakly expressed non-sharp extreme. From the experiment, it is also evident that for the studied samples (as quasisolid magnetics) the transition value L/D=[L/D] = 10-12, i.e., significantly lower than for solid samples, particularly those made of steel. The dependence of demagnetizing factor data on L/D has been obtained for “short” samples (1 ≤ L/D < [L/D]). In addition, eligibility of approximation by exponential expression has been shown for this data.

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Some Actual Problems of Magnetic Filters With Magnetized Packed Beds and Comparative Analysis of Filter Performances

Abbasov

2019

IEEE Trans. Magn.

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A ferroparticle in a magnetizable disperse medium made up of particles of a like nature: Specific aspects of susceptibility determination

Cited by 3 publications

References 19 publications

Magnetofluidic spreading in circular chambers under a uniform magnetic field

Magnetofluidic spreading in circular chambers under a uniform magnetic field

Characteristics of magnetic parameters of granular samples with various relative length

Some Actual Problems of Magnetic Filters With Magnetized Packed Beds and Comparative Analysis of Filter Performances

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