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논문 기본 정보

자료유형
학술저널
저자정보
Jia Long (Fuzhou University) Zixu Miao (Fuzhou University) Huihuang Chen (The University of Queensland) Rongdong Deng (Fuzhou University) Weiran Zuo (Fuzhou University) Bao Guo (Fuzhou University) Jiangang Ku (Fuzhou University)
저널정보
한국자기학회 Journal of Magnetics Journal of Magnetics Vol.25 No.1
발행연도
2020.3
수록면
15 - 21 (7page)
DOI
10.4283/JMAG.2020.25.1.015

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초록· 키워드

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Chain-like and diamond-shaped magnetic particle agglomeration (MPA) commonly forming in a weak magnetic field are simulated based on the finite element method (FEM), and the effects of particle diameter, magnetic field strength, particle relative magnetic permeability, and particle number in magnetic particle chains (MPCs) and diamond-shaped MPA on the strength of MPA are analysed in detail. The results show that magnetic forces on the centre contact points (CCPs) of MPA are positively correlated with the particle diameter, magnetic field strength, particle relative magnetic permeability, and particle number. In addition, the forces on the CCPs of the MPCs (N=2) have a square relationship with the particle diameter and magnetic field strength and have a power relationship of 1.25 with the particle relative magnetic permeability. The forces on each contact point decrease slowly from the centre to both ends in the MPCs and then rapidly decrease to one value (approximately 0.779 times the forces on the CCPs). As for the diamond-shaped MPA, with the increase in the angle α between the magnetic field and axis of diamond-shaped MPA, the force magnitude of the particle entrained parallelly in the diamond-shaped MPA shows a trend of a “cosine curve” shape and the minimum value is 2109 times that of the entrained particle’s gravity. The angle θ between the direction of the force and the negative X-axis shows a trend of a “sine curve” shape. When α = 25° and 155°, the angle θ of the force on the entrained particle reaches an extreme value, that is, θ = 21.87°. Only if the angle θ reaches 30º can the particle entrained parallelly escape from the diamond-shaped MPA. Thus, the diamond-shaped MPA remains in a stable state and it is difficult to disperse MPA by changing the direction of the magnetic field.

목차

1. Introduction
2. Magnetic Particle Agglomeration Geometric Model And Simulation Parameters
3. Solution Region and Solving the Equation of Models
4. Calculation Results and Discussion
5. Conclusion
References

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