An asymptotically compatible probabilistic collocation method for randomly heterogeneous nonlocal problems
An asymptotically compatible probabilistic collocation method for randomly heterogeneous nonlocal problems
复制标题
随机异构非局部问题的渐近相容概率配置方法
DOI:
10.1016/j.jcp.2022.111376
复制
发表时间:
2022
影响因子:
4.1
通讯作者:
Yu, Yue
中科院分区:
文献类型:
--
作者:
Fan, Yiming;Tian, Xiaochuan;Yang, Xiu;Li, Xingjie;Webster, Clayton;Yu, Yue
In this paper we present an asymptotically compatible meshfree method for solving nonlocal equations with random coefficients, describing diffusion in heterogeneous media. In particular, the random diffusivity coefficient is described by a finite-dimensional random variable or a truncated combination of random variables with the Karhunen-Loève decomposition, then a probabilistic collocation method (PCM) with sparse grids is employed to sample the stochastic process. On each sample, the deterministic nonlocal diffusion problem is discretized with an optimization-based meshfree quadrature rule. In terms of analysis, we first show the analytic regularity of solutions with respect to parameters in the diffusion coefficients and then present the rigorous convergence analysis for the proposed numerical scheme, i.e., the scheme is asymptotic compatible spatially and achieves an algebraic or sub-exponential convergence rate in the random coefficients space as the number of collocation points grows. These results are further confirmed by a number of benchmark problems. Finally, to validate the applicability of this approach we consider a randomly heterogeneous nonlocal problem with a given spatial correlation structure, demonstrating that the proposed PCM approach achieves substantial speed-up compared to conventional Monte Carlo simulations.
登录
查看更多内容
影响因子:
2.9
作者:
Peng Chen;A. Quarteroni;G. Rozza
通讯作者:
G. Rozza
DOI:
10.1016/j.cma.2021.113691
发表时间:
2021-01
期刊:
ArXiv
影响因子:
--
作者:
Yue Yu;Huaiqian You;Nathaniel Trask
通讯作者:
Yue Yu;Huaiqian You;Nathaniel Trask
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
X. Antoine;H. Barucq
通讯作者:
H. Barucq
DOI:
10.1016/j.cma.2018.08.016
发表时间:
2018-01
影响因子:
7.2
作者:
Nathaniel Trask;Huaiqian You;Yue Yu;M. Parks
通讯作者:
Nathaniel Trask;Huaiqian You;Yue Yu;M. Parks
影响因子:
14.2
作者:
M. D'Elia;Q. Du;Christian A. Glusa;M. Gunzburger;Xiaochuan Tian;Zhi Zhou
通讯作者:
M. D'Elia;Q. Du;Christian A. Glusa;M. Gunzburger;Xiaochuan Tian;Zhi Zhou