On a SAV-MAC scheme for the Cahn–Hilliard–Navier–Stokes phase-field model and its error analysis for the corresponding Cahn–Hilliard–Stokes case

On a SAV-MAC scheme for the Cahn–Hilliard–Navier–Stokes phase-field model and its error analysis for the corresponding Cahn–Hilliard–Stokes case
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Cahn-Hilliard-Navier-Stokes相场模型的SAV-MAC格式及其对应Cahn-Hilliard-Stokes情况的误差分析

DOI:
10.1142/s0218202520500438
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发表时间:
2019-05
影响因子:
3.5
通讯作者:
Jie Shen
Jie Shen
中科院分区:
数学1区
文献类型:
--
作者:
Xiaoli Li;Jie Shen

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针对Cahn-Hilliard-Navier-Stokes相场模型,构造了一种基于时间标量辅助变量(SAV)逼近和空间MAC离散的数值格式,证明了该格式的能量稳定性,并仅对相应的Cahn-Hilliard-Stokes相场模型进行了误差分析.该方案是线性的,二阶的,无条件能量稳定的,可以非常有效地实现。我们建立了Cahn-Hilliard-Stokes相场模型在不同离散范数下相场变量、化学势、速度和压力在时间和空间上的二阶误差估计。我们还提供了数值实验来验证我们的理论结果,并证明我们的计划的鲁棒性和准确性。
We construct a numerical scheme based on the scalar auxiliary variable (SAV) approach in time and the MAC discretization in space for the Cahn–Hilliard–Navier–Stokes phase- field model, prove its energy stability, and carry out error analysis for the corresponding Cahn–Hilliard–Stokes model only. The scheme is linear, second-order, unconditionally energy stable and can be implemented very efficiently. We establish second-order error estimates both in time and space for phase-field variable, chemical potential, velocity and pressure in different discrete norms for the Cahn–Hilliard–Stokes phase-field model. We also provide numerical experiments to verify our theoretical results and demonstrate the robustness and accuracy of our scheme.
DOI: 10.3934/dcds.2010.28.1669
发表时间: 2010-06
影响因子: 1.1
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