论文标题
单个结构域粒子大集合的粒子磁化动力学的仿真框架：磁颗粒成像中棕色/néel动力学的数值处理和参数识别问题
A simulation framework for particle magnetization dynamics of large ensembles of single domain particles: Numerical treatment of Brown/Néel dynamics and parameter identification problems in magnetic particle imaging
论文作者
论文摘要
磁性纳米颗粒及其磁化动力学在许多应用中起着重要作用。我们专注于以布朗和内尔旋转机制为特征的单个域纳米颗粒的大集合中的磁化动力学。通过在球体上求解对流扩散方程来获得相应行为的模拟，该方程开发和研究了统一的计算框架。这建立了解决两个参数识别问题的基础，这些问题是在所选应用程序磁性粒子成像的背景下提出的。计算框架的功能通过参数识别问题中的数值结果进行了说明，要么定量或定性地与测量数据进行了比较。
Magnetic nanoparticles and their magnetization dynamics play an important role in many applications. We focus on magnetization dynamics in large ensembles of single domain nanoparticles being characterized by either Brownian or Néel rotation mechanisms. Simulations of the respective behavior are obtained by solving advection-diffusion equations on the sphere, for which a unified computational framework is developed and investigated. This builds the basis for solving two parameter identification problems, which are formulated in the context of the chosen application, magnetic particle imaging. The functionality of the computational framework is illustrated by numerical results in the parameter identification problems either compared quantitatively or qualitatively to measured data.
