A Second-Order Energy Stable BDF Numerical Scheme for the Cahn-Hilliard Equation
A Second-Order Energy Stable BDF Numerical Scheme for the Cahn-Hilliard Equation
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Cahn-Hilliard方程的二阶能量稳定BDF数值格式
DOI:
10.4208/cicp.oa-2016-0197
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发表时间:
2018
影响因子:
3.7
通讯作者:
Wise Steven M.
中科院分区:
文献类型:
--
作者:
Yan Yue;Chen Wenbin;Wang Cheng;Wise Steven M.
In this paper we present a second order accurate (in time) energy stable numerical scheme for the Cahn-Hilliard (CH) equation, with a mixed finite element approximation in space. Instead of the standard second order Crank-Nicolson methodology, we apply the implicit backward differentiation formula (BDF) concept to derive second order temporal accuracy, but modified so that the concave diffusion term is treated explicitly. This explicit treatment for the concave part of the chemical potential ensures the unique solvability of the scheme without sacrificing energy stability. An additional term Aτ∆(uk+1−uk) is added, which represents a second order Douglas-Dupont-type regularization, and a careful calculation shows that energy stability is guaranteed, provided the mild condition A ≥ 1 16 is enforced. In turn, a uniform in time H1 bound of the numerical solution becomes available. As a result, we are able to establish an l∞(0, T ;L2) convergence analysis for the proposed fully discrete scheme, with full O(τ2+h2) accuracy. This convergence turns out to be unconditional; no scaling law is needed between the time step size τ and the spatial grid size h. A few numerical experiments are presented to conclude the article.
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影响因子:
2.5
作者:
Kelong Cheng;Cheng Wang;S. Wise;Xingye Yue
通讯作者:
Kelong Cheng;Cheng Wang;S. Wise;Xingye Yue
DOI:
10.1137/110822839
发表时间:
2012
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
Jie Shen;Cheng Wang;Xiaoming Wang;S. Wise
通讯作者:
Jie Shen;Cheng Wang;Xiaoming Wang;S. Wise
DOI:
10.1016/0001-6160(79)90196-2
发表时间:
1979-01-01
期刊:
ACTA METALLURGICA
影响因子:
--
作者:
ALLEN, SM;CAHN, JW
通讯作者:
CAHN, JW
影响因子:
2.1
作者:
A. Aristotelous;O. Karakashian;S. Wise
通讯作者:
A. Aristotelous;O. Karakashian;S. Wise
DOI:
10.1137/080738143
发表时间:
2009-04
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
S. Wise;Cheng Wang;J. Lowengrub
通讯作者:
S. Wise;Cheng Wang;J. Lowengrub