Bound/positivity preserving and unconditionally stable schemes for a class of fourth order nonlinear equations
Bound/positivity preserving and unconditionally stable schemes for a class of fourth order nonlinear equations
复制标题
一类四阶非线性方程的有界/正性保持和无条件稳定格式
DOI:
10.1016/j.jcp.2022.111177
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发表时间:
2022
影响因子:
4.1
通讯作者:
Wu, Ke
中科院分区:
文献类型:
--
作者:
Huang, Fukeng;Shen, Jie;Wu, Ke
We construct two classes of time discretization schemes for fourth order nonlinear equations by combining a function transform approach with the scalar auxiliary variable (SAV) approach. A suitable function transform ensures that the schemes are bound/positivity preserving, while the SAV approach enables us to construct unconditionally stable schemes. The first class of schemes requires solving a coupled second-order linear systems with variable coefficients at each time step, while the second class of schemes only requires solving a fourth-order linear equation with constant coeffcients. We apply this approach to the Cahn-Hilliard equations with logarithmic potential and the more challenging Lubrication-type equations, and present ample numerical examples to validate the accuracy and efficiency of the proposed schemes.
DOI:
10.1016/j.cma.2022.114585
发表时间:
2021-07
影响因子:
7.2
作者:
Q. Cheng;Jie Shen
通讯作者:
Q. Cheng;Jie Shen
影响因子:
2.1
作者:
Hu, Jingwei;Huang, Xiaodong
通讯作者:
Huang, Xiaodong
DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
P. Neogi;Clarence A. Miller
通讯作者:
Clarence A. Miller