Behavior of magnetic particles under fluctuating fields considering hysteresis characteristics
Behavior of magnetic particles under fluctuating fields considering hysteresis characteristics
复制标题
考虑磁滞特性的脉动场下磁性颗粒的行为
DOI：
10.1016/j.jmmm.2013.01.029
复制
发表时间：
2013
影响因子：
2.7
通讯作者：
Naofumi Murata and Kenji Oguni
中科院分区：
文献类型：
--
作者：
塩見拓也;三木朋広;Naofumi Murata and Kenji Oguni
磁性粒子的模拟大多是在空间和时间静态磁场下进行的。众所周知，链状团簇在这些恒定电场下形成。然而，颗粒的滞后特性因此常常被忽视。本文提出了脉动磁场作用下具有磁滞特性的磁性颗粒的行为分析方法。考虑到迟滞特性和脉动场，除了颗粒碰撞引起的能量耗散外，还给系统带来了非线性和驱动力。本研究旨在寻找这些系统中常见的混沌行为在粒子聚集中的立足点。所提出的方法从场的离散化开始。碰撞和聚类建模处理机械接触，即通过解决赫兹的接触问题。辛积分器用于时间积分。对于模拟，200个磁性粒子在空间和时间波动场下的行为进行了检查。结果表明，滞后特性对聚类模式有很大的影响。
Simulations of magnetic particles are mostly carried out under spatially and temporally static magnetic fields. It is well known that chain-like clusters are formed under these constant fields. However the hysteresis characteristics of particles are therefore often neglected. In this paper, methods to analyze behavior of magnetic particles with hysteresis characteristics under fluctuating fields are proposed. Consideration of hysteresis characteristics and fluctuating fields brings nonlinearity and driving forces to the system in addition to the energy dissipation caused by particle collisions. This research aims to find the foothold of chaotic behavior, which is often found in these systems, among particle clustering. The proposed methods start from the discretization of fields. Collisions and clustering are modeled by treating mechanical contacts, namely, by solving Hertz's contact problem. A symplectic integrator is used for time integration. For the simulation, behavior of 200 magnetic particles under spatially and temporally fluctuating fields were examined. The results imply hysteresis characteristics have a great effect on clustering patterns.