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An efficient algorithm for solving the phase field crystal model

机译:一种求解相场晶模型的有效算法

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We present and discuss the development of an unconditionally stable algorithm used to solve the evolution equations of the phase field crystal (PFC) model. This algorithm allows for an arbitrarily large algorithmic time step. As the basis for our analysis of the accuracy of this algorithm, we determine an effective time step in Fourier space. We then compare our calculations with a set of representative numerical results, and demonstrate that this algorithm is an effective approach for the study of the PFC models, yielding a time step effectively 180 times larger than the Euler algorithm for a representative set of material parameters. As the PFC model is just a simple example of a wide class of density functional theories, we expect this method will have wide applicability to modeling systems of considerable interest to the materials modeling communities. (c) 2008 Elsevier Inc. All rights reserved.
机译:我们展示并探讨了用于解决相场晶体(PFC)模型的进化方程的无条件稳定算法的开发。 该算法允许任意大的算法时间步骤。 作为我们分析该算法的准确性的基础,我们确定了傅里叶空间的有效时间步骤。 然后,我们将计算与一组代表性的数值结果进行比较,并证明该算法是对PFC模型进行研究的有效方法,其时间步是有效地比代表性一组材料参数集的欧拉算法大的时间步长180倍。 由于PFC模型只是广泛的密度功能理论的一个简单示例,我们预计该方法将对材料建模社区的适用性造型广泛适用性。 (c)2008年elestvier Inc.保留所有权利。

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