Parareal for diffusion problems with space- and time-dependent coefficients
Institute of Computational Science, Università della Svizzera italiana(瑞士意大利大学计算科学研究所);Jülich Supercomputing Centre, Forschungszentrum Jülich GmbH(于利希超级计算中心,于利希研究中心有限公司)
Daniel Ruprecht, Robert Speck, Rolf Krause
发表信息:
Lecture Notes in Computational Science and Engineering 104, Springer International Publishing, pages 371-378, 2016
For the time-parallel Parareal method, there exists both numerical and analytical proof that it converges very well for diffusive problems like the heat equation. Many applications, however, do not lead to simple homogeneous diffusive scenarios but feature strongly inhomogeneous and possibly anisotropic coefficients. The paper presents results from a numerical study of how space- and time-dependent coefficients in a diffusion setup affect Parareal's convergence behaviour. It is shown that, for the presented examples, non-constant diffusion coefficients have only marginal influence on how fast Parareal converges. Furthermore, an example is shown that illustrates how for linear problems the maximum singular value of the Parareal iteration matrix can be used to estimate convergence rates.
Nonlinear Parareal-Incomplete OSWR Method for the Coupled Reaction-Diffusion System: Convergence Analysis and Computational Strategies
Institute of Mathematics, Czech Academy of Sciences(捷克科学院数学研究所);School of Mathematics, Indian Institute of Science Education and Research Thiruvananthapuram(印度科学教育与研究学院特里凡得琅数学学院)
Parareal in time 3D numerical solver for the LWR Benchmark neutron diffusion transient model
CEA/DEN/DANS/DM2S(法国原子能和替代能源委员会核能研究与开发部核系统模拟部门);UPMC-CNRS/LJLL(巴黎第六大学-法国国家科学研究中心雅克-路易·利翁斯实验室);CEA-DRN/DMT/SERMA(法国原子能和替代能源委员会核研究局材料测试与模拟处反应堆建模与分析组);Sorbonne Universités, UPMC Univ Paris 06(索邦大学,巴黎第六大学);Institut Universitaire de France(法兰西学院);Brown Univ, Division of Applied Maths(布朗大学应用数学系);CMAP, Inria-Saclay and X-Ecole Polytechnique(巴黎综合理工学院-法国国家信息与自动化研究所萨克雷计算数学与应用中心);CEREMADE, Univ Paris-Dauphine(巴黎第九大学数学与决策研究中心)
A model order reduction based adaptive parareal method for time-dependent partial differential equations
Academy of Mathematics and Systems Science, Chinese Academy of Sciences(中国科学院数学与系统科学研究院);University of Chinese Academy of Sciences(中国科学院大学);China Pharmaceutical University(中国药科大学)