考虑磁振效应和粒子相互作用的铁磁流体屏蔽性能的数值研究

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-02-07 DOI:10.3846/mma.2022.14660

O. Lavrova, V. Polevikov

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引用次数: 2

摘要

对圆柱厚壁铁磁流体层的屏蔽性能进行了数值研究。我们考虑磁性纳米颗粒在铁磁流体中的扩散，粒子之间具有磁偶极子-偶极子，空间和流体动力相互作用。铁磁流体的磁导率与磁场强度和粒子浓度有关。基于磁性纳米颗粒在铁磁流体中的传质方程，采用有限差分与边界元相结合的方法，在非线性代数方程的基础上，求解了静磁力在整个空间中的非线性传递问题。数值实验表明，与均匀粒子分布时的计算结果相比，粒子扩散对弱、强外加磁场下屏蔽性能的影响可以忽略不计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Numerical Study of the shielding Properties of a ferrofluid Taking into Account Magnitophoresis and Particle Interaction

Shielding properties of a cylindrical thick-walled ferrofluid layer that protects against externally applied uniform magnetic fields are numerically investigated. We take into account the diffusion of magnetic nanoparticles in the ferrofluid with magnetic dipole-dipole, steric and hydrodynamic interactions between particles. Permeability of the ferrofluid is considered to be dependent on the magnetic-field strength and the particle concentration. A combined method of finite differences and boundary elements is applied to solve a nonlinear transmission problem of magnetostatics in the whole space, augmented by nonlinear algebraic equations based on the mass transfer equation for magnetic nanoparticles in ferrofluids. Numerical experiments revealed that the diffusion of particles has negligible influence on the shielding properties at weak and strong intensities of the applied magnetic field when comparing with the results of computations for a uniform particle distribution.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.