Field-induced circulation flow in magnetic fluids

Phil. Trans. R. Soc. A.

Chirikov

Musikhin

et al. 2021

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We present results of theoretical modelling of macroscopic circulating flow induced in a cloud of ferrofluid by an oscillating magnetic field. The cloud is placed in a cylindrical channel filled by a nonmagnetic liquid. The aim of this work is the development of a scientific basis for a progressive method of addressing drug delivery to thrombus clots in blood vessels with the help of the magnetically induced circulation flow. Our results show that the oscillating field can induce, inside and near the cloud, specific circulating flows with the velocity amplitude about several millimetres per second. These flows can significantly increase the rate of transport of the molecular non-magnetic impurity in the channel. This article is part of the theme issue ‘Transport phenomena in complex systems (part 1)’.

Section: Introductionmentioning

confidence: 70%

Nonlinear theory of macroscopic flow induced in a drop of ferrofluid

Phil. Trans. R. Soc. A.

Chirikov

Musikhin

et al. 2021

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“…The obtained results open new opportunities for controlling these phenomena with the help of an applied field. The work of Musickhin et al [32] offers a theoretical study of hydrodynamic patterns induced in liquids (blood, for instance) by suspended ferromagnetic nanoparticles under an alternating magnetic field. The patterned flow can be used for intensification of drug delivery in thrombosed blood vessels for the treatment of insults, stenoses and thromboembolism.…”

Section: (A) Pattern Evolution and The Kinetics Of Growthmentioning

confidence: 99%

Patterns in soft and biological matters

Alexandrov

Phil. Trans. R. Soc. A.

2020

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The issue is devoted to theoretical, computer and experimental studies of internal heterogeneous patterns, their morphology and evolution in various soft physical systems—organic and inorganic materials (e.g. alloys, polymers, cell cultures, biological tissues as well as metastable and composite materials). The importance of these studies is determined by the significant role of internal structures on the macroscopic properties and behaviour of natural and manufactured tissues and materials. Modern methods of computer modelling, statistical physics, heat and mass transfer, statistical hydrodynamics, nonlinear dynamics and experimental methods are presented and discussed. Non-equilibrium patterns which appear during macroscopic transport and hydrodynamic flow, chemical reactions, external physical fields (magnetic, electrical, thermal and hydrodynamic) and the impact of external noise on pattern evolution are the foci of this issue. Special attention is paid to pattern formation in biological systems (such as drug transport, hydrodynamic patterns in blood and pattern dynamics in protein and insulin crystals) and to the development of a scientific background for progressive methods of cancer and insult therapy (magnetic hyperthermia for cancer therapy; magnetically induced drug delivery in thrombosed blood vessels). The present issue includes works on pattern growth and their evolution in systems with complex internal structures, including stochastic dynamics, and the influence of internal structures on the external static, dynamic magnetic and mechanical properties of these systems. This article is part of the theme issue ‘Patterns in soft and biological matters’.

“…where  is the angular frequency of the alternating magnetic field, t is the time and the spatial parts h(x,z) of the fields can be calculated by using the standard formulas for the fields of the cylindrical solenoids with given values of the current intensity, radius and length. Exact expressions for h(x,z) are provided in our previous work [5]. Below we will use the notation = 2 / for the period of the field oscillation The results of calculations of the local absolute value H(x,z,t) of the total field H=H1 + H2 are illustrated in Fig.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…A theoretical analysis of the circulation flow in a liquid in a flat channel, a few moments after injection of a ferrofluid drop , under the action of a rotating field has been proposed in ref. [5]. The considered ferrofluid was supposed to consist of individual spherical particles with permanent magnetic moments .…”

Section: Introductionmentioning

confidence: 99%

To the theory of ferrohydrodynamic circulating flow induced by running magnetic field

Eur. Phys. J. Spec. Top.

Raboisson-Michel

Verger‐Dubois³

et al. 2020

Self Cite

We present results of theoretical modelling of macroscopic circulating flow induced in a drop of ferrofluid by oscillating running magnetic field. The drop is placed in a narrow flat channel filled by a non-magnetic liquid. The aim of this work is development of a scientific basis for a progressive method of address drug delivery to thrombus clots in blood vessels with the help of the magnetically induced circulation flow. Our results show that the oscillating running field allows inducing the carrier fluid flow with velocity amplitude 1-10 cm/s. This is the range of values, presenting interest from the point of view of the drug delivery.