The behaviour of magnetic spherical particles and the heating effect in a rotating magnetic field via Brownian dynamics simulations
The behaviour of magnetic spherical particles and the heating effect in a rotating magnetic field via Brownian dynamics simulations
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通过布朗动力学模拟磁性球形颗粒的行为和旋转磁场中的加热效应
DOI：
10.1080/00268976.2021.1892225
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发表时间：
2021
影响因子：
1.7
通讯作者：
Futamura Muneo
中科院分区：
文献类型：
--
作者：
Suzuki Seiya;Satoh Akira;Futamura Muneo
本研究解决的物理现象的悬浮液组成的磁性球形颗粒在旋转磁场中，以阐明颗粒聚集现象的影响，从布朗弛豫的热产生通过布朗动力学模拟。在弱磁性粒子-粒子相互作用的情况下，粒子不会聚集形成特定的簇结构。在这种情况下，每个粒子的磁矩迅速向磁场方向倾斜，单个粒子不会产生足够大的加热效应。随着颗粒之间的磁相互作用的增加，链状团簇倾向于在系统中形成，并且起到对磁矩取向提供更大阻力的作用，这导致加热效应的增加。在磁性粒子-粒子相互作用非常强的情况下，颗粒倾向于聚集以形成稳定的环-本文的主要内容阐明了颗粒聚集的特征，并讨论了磁场强度与颗粒聚集的关系，讨论了磁场强度与颗粒聚集的关系。阐明了粒子间相互作用和旋转磁场频率对聚集现象的影响，阐明了粒子聚集体对外加旋转磁场的响应，阐明了磁性粒子构型的产热程度与其内部结构之间的关系.
The present study addresses the physical phenomena of a suspension composed of magnetic spherical particles in a rotating magnetic field in order to elucidate the influence of particle aggregation phenomena on the heat production from Brownian relaxation by means of Brownian dynamics simulations. In the case of a weak magnetic particle-particle interaction, particles do not aggregate to form specific cluster configurations. In this situation, the magnetic moment of each particle quickly inclines toward the field direction, and single particles do not give rise to a sufficiently large heating effect. With an increasing magnetic interaction between particles, chain-like clusters tend to form in the system and function to offer a larger resistance to the orientation of the magnetic moments, which leads to an increase in the heating effect. In the case of a significantly strong magnetic particle-particle interaction, the particles tend to aggregate to form stable ring-like clusters where the magnetic moments of the constituent particles are not able to be so responsive to the rotating magnetic field and this leads to a decrease in the heating effect.Highlights of the present paperThe characteristics of particle aggregation have been clarified.The relationship between the strength of the magnetic particle-particle interaction and the frequency of the rotating magnetic field on the aggregation phenomena has been clarified.The response of the particle aggregates to an applied rotating magnetic field has been clarified.The relationship between the performance of the degree of heat production and the internal structure of magnetic particle configurations has been clarified.
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影响因子：
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作者：
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DOI：
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