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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >A direct expansion method of moments for Brownian coagulation
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A direct expansion method of moments for Brownian coagulation

机译:布朗凝血矩的直接展开方法

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摘要

We propose a new method of moments for solving a coagulation equation based on the Taylor-expansion method of moments (TEMOM). In this model, the closure of the moment equations is achieved by using the Taylor expansion technique, and the fractional-order moments can be used to improve the accuracy of the results. The newly proposed method has no prior requirement for the shape of the particle size distribution. By comparing it with other known methods both in free molecular and continuum regimes, the new approach is found to be the most accurate method. The results show that the predictions of the lower-order moments are not significantly influenced by the higher-order ones, and the higher-order moments are not necessary if one intends to increase the accuracy of the numerical predictions.
机译:我们提出了一种基于泰勒展开式矩量法(TEMOM)的矩量解法。在此模型中,力矩方程的闭合是通过使用泰勒展开技术实现的,并且分数阶矩可用于提高结果的准确性。新提出的方法对粒度分布的形状没有先验要求。通过与自由分子和连续谱领域的其他已知方法进行比较,发现新方法是最准确的方法。结果表明,低阶矩的预测不受高阶矩的显着影响,并且如果要提高数值预测的精度,则不需要高阶矩。

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