Stability and convergence of Strang splitting. Part I: Scalar Allen-Cahn equation
Stability and convergence of Strang splitting. Part I: Scalar Allen-Cahn equation
复制标题
Strang 分裂的稳定性和收敛性。
DOI:
10.1016/j.jcp.2022.111087
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发表时间:
2021-08
影响因子:
4.1
通讯作者:
Jiao Xu
中科院分区:
文献类型:
--
作者:
Dong Li;Chaoyu Quan;Jiao Xu
We consider a class of second-order Strang splitting methods for Allen-Cahn equations with polynomial or logarithmic nonlinearities. For the polynomial case both the linear and the nonlinear propagators are computed explicitly. We show that this type of Strang splitting scheme is unconditionally stable regardless of the time step. Moreover we establish strict energy dissipation for a judiciously modified energy which coincides with the classical energy up to O (τ) where τ is the time step. For the logarithmic potential case, since the continuous-time nonlinear propagator no longer enjoys explicit analytic treatments, we employ a second order in time two-stage implicit Runge–Kutta (RK) nonlinear propagator together with an efficient Newton iterative solver. We prove a maximum principle which ensures phase separation and establish energy dissipation law under mild restrictions on the time step. These appear to be the first rigorous results on the energy dissipation of Strang-type splitting methods for Allen-Cahn equations.
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影响因子:
2.1
作者:
Li Buyang;Wu Yifei
通讯作者:
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DOI:
10.1016/j.camwa.2010.06.041
发表时间:
2010-09
期刊:
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影响因子:
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DOI:
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发表时间:
1990
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影响因子:
--
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DOI:
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发表时间:
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期刊:
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影响因子:
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作者:
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通讯作者:
Yuanzhen Cheng;A. Kurganov;Zhuolin Qu;T. Tang