نتایج جستجو برای: magnetic particle

تعداد نتایج: 502790  

2003
S. Olszewski

A charged particle in its planar motion in a constant magnetic field is submitted a centripetal force acting on that particle. The amplitude of this force is constant in time. In this paper it is demonstrated that by a linear change in time of the magnetic induction another centripetal force acting on the particle is created. This force has an amplitude oscillating in time with the frequency eq...

2010
Z. Sun M. Guo F. Verhaeghe J. Vleugels O. Van der Biest B. Blanpain

An analytical approach is developed in the present paper to investigate the interaction between two non-magnetic particles migrating in a conductive fluid due to an imposed strong magnetic field (e.g., 10 Tesla). The interaction between the conductive fluid and a single particle migrating along the magnetic lines is influenced by the magnetic field and can be represented by an additional fluid ...

In this research cobalt ferrite (CoFe2O4) nano-crystalline powders were prepared by simple chemical precipitation method using cobalt sulfate. The CoFe2O4 nanoparticles were characterized by X-ray diffraction, scanning electron microscopy  and Fourier transform infra-red spectroscopy. The crystallite size of CoFe2O4 nanoparticles was calculated by Debye–Scherrer formula. The effect of precursor...

Journal: :CoRR 2017
Wayan Wicke Arman Ahmadzadeh Vahid Jamali Harald Unterweger Christoph Alexiou Robert Schober

In this paper, we propose to use magnetic nanoparticles as information carriers for molecular communication. This enables the use of an external magnetic field to guide informationcarrying particles towards the receiver. We show that the particle movement can be mathematically modeled as diffusion with drift. Thereby, we reveal that the key parameters determining the magnetic force are particle...

Journal: :Medical physics 2010
Erica M Cherry Peter G Maxim John K Eaton

PURPOSE A physics-based model of a general magnetic drug targeting (MDT) system was developed with the goal of realizing the practical limitations of MDT when electromagnets are the source of the magnetic field. METHODS The simulation tracks magnetic particles subject to gravity, drag force, magnetic force, and hydrodynamic lift in specified flow fields and external magnetic field distributio...

Journal: :Journal of Magnetism and Magnetic Materials 2015

This research study presents a numerical study on forced convection heat transfer of an aqueous ferrofluid passing through a circular copper tube in the presence of an alternating magnetic field. The flow passes through the tube under a uniform heat flux and laminar flow conditions. The primary objective was to intensify the particle migration and disturbance of the boundary layer by utilizing ...

In this research we first synthesized MgFe2O4 nanostructures via hydrothermal method using (Mg(NO₃)₂.6H₂O) and (Fe(NO₃)₃.9H₂O). The influence of concentration, surfactant, precipitating agent and temperature on the particle size and magnetic properties of the synthesised nanoparticles were examined. Then MgFe2O4-Ag nanocomposites were prepared by a simple chemical precipitation. The structural ...

Journal: :Physical sciences reviews 2021

Abstract Magnetic particle imaging (MPI) is a young modality for biomedical applications. It uses magnetic nanoparticles as tracer material to produce three-dimensional images of the spatial distribution in field-of-view. Since magnetization dynamics are tied hydrodynamic mobility via Brownian relaxation mechanism, MPI also capable mapping local environment during process. influence viscosity o...

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