Local Discontinuous Galerkin Method and High Order Semi-Implicit Scheme for the Phase Field Crystal Equation
Local Discontinuous Galerkin Method and High Order Semi-Implicit Scheme for the Phase Field Crystal Equation
复制标题
相场晶体方程的局部间断伽辽金法和高阶半隐式格式
DOI:
10.1137/15m1038803
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发表时间:
2016-01
影响因子:
3.1
通讯作者:
Xu Yan
中科院分区:
文献类型:
--
作者:
Guo Ruihan;Xu Yan
In this paper, we present a local discontinuous Galerkin (LDG) method and two unconditionally energy stable schemes for the phase field crystal (PFC) equation. The semidiscrete energy stability of the LDG method is proved first. The PFC equation is a sixth order nonlinear partial differential equation (PDE), which leads to the severe time step restriction ($\Delta t=\mathcal{O}(\Delta x^6)$) of explicit time discretization methods to maintain stability. Due to this, we introduce semi-implicit first order and second order time discretization methods which are based on the convex splitting principle of a discrete energy and prove the corresponding unconditional energy stabilities. To improve the temporal accuracy, the spectral deferred correction (SDC) method and a high order semi-implicit Runge--Kutta method combining with the first--order convex splitting method are adopted for the PFC equation with constant and degenerate mobility, respectively. The equations at the implicit time level are nonlinear and ...
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影响因子:
2
作者:
Bernardo Cockburn;S. Hou;Chi-Wang Shu
通讯作者:
Bernardo Cockburn;S. Hou;Chi-Wang Shu
DOI:
10.1016/j.jcp.2014.09.025
发表时间:
2015
期刊:
J. Comput. Phys.
影响因子:
--
作者:
Yinhua Xia
通讯作者:
Yinhua Xia
影响因子:
2
作者:
Bernardo Cockburn;Chi-Wang Shu
通讯作者:
Bernardo Cockburn;Chi-Wang Shu
影响因子:
1
作者:
M. Minion
通讯作者:
M. Minion
影响因子:
2.9
作者:
SWIFT, J;HOHENBERG, PC
通讯作者:
HOHENBERG, PC