Development of Numerical Analysis Method for Magnetic Separation of Magnetic Particle and Ion With Magnetic Chromatography

Abstract

Abstract-The magnetic chromatography is a very useful system for an ion and/or fine magnetic particle separation due to its strong magnetic field gradients in a very small flow channel. We have developed the magnetic chromatography system to separate the fine particles and ions. However, its numerical simulation is difficult, since the scale of the ions or fine particles in fluid is much different from the scale of the superconducting magnet generating the strong magnetic field. In order to accurately simulate the magnetic separation, it is necessary to develop the simulation code dealing with the multi-scale problem.

Investigation on Novel Magnetic Chromatography With Ferromagnetic Nano-Wires for Ion Separation

“…The magnetic force is represented by the last term on the right hand in (1). In this paper, the magnetic field H is obtained using the magnetic moment method [10], [11], since the scale of the magnetic fluid is much different from that of the superconducting magnet. In order to investigate the performance of the magnetic chromatography, the magnetic force F mag is evaluated, that is, the gradient of the magnetic field H is the most important factor.…”

“…The magnetic chromatography system was previously proposed and tested [7]- [10]. The magnetic column is shown in However, it was difficult to stably separate ions or magnetic particles.…”

“…Thus, the distribution of concentration in the radial direction would be different and the exhaustion time different as well. In order to confirm the magnetic force attracting for the wall and the flow of the ions and magnetic particles, we have developed the simulation code coupling the fluid dynamics and the electromagnetics [10], [11]. As the result, the meandering fluid flow with weak magnetic force attracting for the wall was observed.…”

“…We have developed a magnetic chromatography system to separate the ions and fine magnetic particles [8]- [10]. In the developed magnetic chromatography system, ferromagnetic wires with width of 200 m, that generate the magnetic field gradients, are located at the upper and lower walls [9].…”

“…In this paper, at first, the magnetic field gradients generated by the old magnetic chromatography, that was presented in the papers [8]- [10], were evaluated. Moreover, a new magnetic chromatography system is proposed, there are many nano-wires on the walls to generate the magnetic field gradients.…”