Efficient and linear schemes for anisotropic Cahn-Hilliard model using the Stabilized-Invariant Energy Quadratization (S-IEQ) approach

Efficient and linear schemes for anisotropic Cahn-Hilliard model using the Stabilized-Invariant Energy Quadratization (S-IEQ) approach
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使用稳定不变能量二次化 (S-IEQ) 方法的各向异性 Cahn-Hilliard 模型的高效线性方案

DOI:
10.1016/j.cpc.2018.12.019
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发表时间:
2019-05
影响因子:
6.3
通讯作者:
Xie Ziqing
Xie Ziqing
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Xu Zhen;Yang Xiaofeng;Zhang Hui;Xie Ziqing

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在本文中,我们考虑各向异性Cahn-Hilliard方程的数值逼近。我们开发了两个线性和二阶格式,结合了联合收割机的IEQ方法与稳定化技术,其中添加了几个额外的线性稳定化项,他们可以被证明是至关重要的,以抑制非物理的空间振荡所造成的强各向异性。我们证明了所得到的线性系统的适定性,并进一步严格证明了它们相应的无条件能量稳定性。各种二维和三维数值模拟,以证明所提出的计划的稳定性,精度和效率。
In this paper, we consider numerical approximations for the anisotropic Cahn–Hilliard equation. We develop two linear and second-order schemes that combine the IEQ approach with the stabilization technique, where several extra linear stabilization terms are added in and they can be shown to be crucial to suppress the non-physical spatial oscillations caused by the strong anisotropy. We show the well-posedness of the resulting linear systems and further prove their corresponding unconditional energy stabilities rigorously. Various 2D and 3D numerical simulations are presented to demonstrate the stability, accuracy, and efficiency of the proposed schemes.
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