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首页> 美国卫生研究院文献>Biophysical Journal >Hydrodynamic properties of rigid particles: comparison of different modeling and computational procedures.
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Hydrodynamic properties of rigid particles: comparison of different modeling and computational procedures.

机译：刚性颗粒的流体动力学特性：不同建模和计算程序的比较。

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The hydrodynamic properties of rigid particles are calculated from models composed of spherical elements (beads) using theories developed by Kirkwood, Bloomfield, and their coworkers. Bead models have usually been built in such a way that the beads fill the volume occupied by the particles. Sometimes the beads are few and of varying sizes (bead models in the strict sense), and other times there are many small beads (filling models). Because hydrodynamic friction takes place at the molecular surface, another possibility is to use shell models, as originally proposed by Bloomfield. In this work, we have developed procedures to build models of the various kinds, and we describe the theory and methods for calculating their hydrodynamic properties, including approximate methods that may be needed to treat models with a very large number of elements. By combining the various possibilities of model building and hydrodynamic calculation, several strategies can be designed. We have made a quantitative comparison of the performance of the various strategies by applying them to some test cases, for which the properties are known a priori. We provide guidelines and computational tools for bead modeling.
机译：刚性颗粒的流体力学特性是使用Kirkwood，Bloomfield及其同事开发的理论从由球形元素（珠子）组成的模型计算得出的。珠子模型通常以这样的方式构建：珠子填充粒子所占据的体积。有时，珠子很少且大小各异（严格意义上为珠子模型），而其他时候则有许多小珠子（填充模型）。由于流体动力摩擦发生在分子表面，因此另一种可能性是使用壳模型，如Bloomfield最初提出的那样。在这项工作中，我们开发了建立各种模型的程序，并描述了计算其流体力学特性的理论和方法，包括处理包含大量元素的模型可能需要的近似方法。通过组合模型构建和流体动力学计算的各种可能性，可以设计几种策略。我们通过将各种策略应用于某些先验性质的测试案例对它们的性能进行了定量比较。我们提供了用于磁珠建模的准则和计算工具。

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