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首页> 外文期刊>The European physical journal, E. Soft matter >Compressibility of ferrofluids: Towards a better understanding of structural properties
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Compressibility of ferrofluids: Towards a better understanding of structural properties

机译：FerrofloIds的可压缩性：更好地了解结构性

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This paper addresses a computational method aimed at obtaining the isothermal compressibility of ferrofluids by means of molecular dynamics (MD) simulations. We model ferrofluids as a system of dipolar soft spheres and carry out MD simulations in the NPT ensemble. The obtained isothermal compressibility computed via volume fluctuations provides us with a strong evidence that dipolar interactions lead to a higher compressibility of dipolar soft sphere systems: the stronger the dipolar interactions, the bigger is the deviation of the compressibility from the one of a system with no dipoles. Furthermore, we use the isothermal compressibility to calculate the structure factor of ferrofluids at low values of wave vectors, i.e. in the range where it is difficult to predict its behaviour because of a problem with accounting for long-range particle correlations that give the main contribution to the structure factor in this range. Our approach based on the interpolation of the structure factor and the computed isothermal compressibility allows us to obtain the smooth structure factor in the range of low wave vectors and the reliable fractal dimension of the clusters formed in the system.
机译：本文通过分子动力学（MD）模拟，解决了旨在获得铁磁流体的等温可压缩性的计算方法。我们将Ferrofluids作为Dipolar软领散的系统，并在NPT集合中进行MD模拟。通过体积波动计算的等温可压缩性为我们提供了强大的证据，即偶极交互导致偶极软球系统的更高可压缩性：偶极相互作用越强，越大是从一个没有的系统中的压缩性偏离偶极子。此外，我们使用等温可压缩性来计算在波矢量的低值下的铁磁流体的结构因子，即在难以预测其行为的范围内，因为占提供了主要贡献的远程粒子相关性的问题在这个范围内的结构因素。我们基于结构因子的插值的方法和计算的等温可压缩性允许我们获得低波矢量范围内的平滑结构因子和系统中形成的簇的可靠分形尺寸。

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