...
首页> 外文期刊>Journal of Computational Physics >A free-energy stable nodal discontinuous Galerkin approximation with summation-by-parts property for the Cahn-Hilliard equation
【24h】

A free-energy stable nodal discontinuous Galerkin approximation with summation-by-parts property for the Cahn-Hilliard equation

机译:一种自由能稳定的节点不连续的Galerkin逼近,逐个零件物业为CAHN-HILLIARD方程

获取原文
获取原文并翻译 | 示例
           

摘要

We present a nodal Discontinuous Galerkin (DG) scheme for the Cahn-Hilliard equation that satisfies the summation-by-parts simultaneous-approximation-term (SBP-SAT) property. The latter permits us to show that the discrete free-energy is bounded, and as a result, the scheme is provably stable. The scheme and the stability proof are presented for general curvilinear three-dimensional hexahedral meshes. We use the Bassi-Rebay 1 (BR1) scheme to compute interface fluxes, and a first order IMplicit-EXplicit (IMEX) scheme to integrate in time. We provide a semi-discrete stability study, and a fully-discrete proof subject to a positivity condition on the solution. Lastly, we test the theoretical findings using numerical cases that include two and three-dimensional problems. (C) 2019 Elsevier Inc. All rights reserved.
机译:我们为CAHN-HILLIARD方程提供了一个节点不连续的GALERKIN(DG)方案,其满足逐个份额的同时逼近术语(SBP-SAT)属性。 后者允许我们表明离散的自由能是有界的,因此该方案是可怕的。 提出了一般曲线三维六半口网的方案和稳定性证据。 我们使用Bassi-Rebay 1(BR1)方案来计算接口通量,以及一阶隐式显式(IMEX)方案以与时间集成。 我们提供半离散的稳定性研究,并在解决方案上进行完全离散的证据。 最后,我们使用包括两个和三维问题的数值案例来测试理论发现。 (c)2019 Elsevier Inc.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号