A new finite volume scheme preserving positivity for radionuclide transport calculations in radioactive waste repository

A new finite volume scheme preserving positivity for radionuclide transport calculations in radioactive waste repository
复制标题

一种新的有限体积方案,保持放射性废物储存库中放射性核素输运计算的积极性

DOI:
10.1016/j.ijheatmasstransfer.2018.01.023
复制
发表时间:
2018-06
影响因子:
5.2
通讯作者:
Yuan Guangwei
Yuan Guangwei
中科院分区:
工程技术2区
文献类型:
--
作者:
Lan Bin;Sheng Zhiqiang;Yuan Guangwei

文献摘要

参考文献

被引文献

相似文献

为了模拟放射性废物地质处置库的远场模型,提出了一种新的二阶精度的任意凸多边形网格上的保正有限体积格式。模型问题描述了扩散、对流和化学反应的耦合过程,其中扩散张量具有高度的各向异性和非均匀性。时间离散采用经典的隐式和显式格式。利用Sheng和Yuan(2016)中的扩散通量离散化,对流通量的离散化基于一种新的修正迎风格式,该格式依赖于一些可用的扩散通量信息。所得到的方案是保正的和局部保守的,并且只有以细胞为中心的未知数。数值结果表明,我们的保正格式的放射性核素输运问题的数值模拟的性能。
In order to simulate a far field model used in geological radioactive waste repository, a new finite volume scheme preserving positivity on arbitrary convex polygonal meshes with second order accuracy is proposed in this paper. The model problem describes the coupled process of diffusion, convection and chemical reaction, in which the diffusion tensors are highly anisotropic and heterogeneous. The classic implicit and explicit schemes are used in the temporal discretization. The discretization of diffusive flux in Sheng and Yuan (2016) is utilized, and the discretization of convective flux is based on a new corrected upwind scheme that depends on some available informations of diffusive flux. The resulting scheme is positivity-preserving and locally conservative, and has only cell-centered unknowns. Numerical results are presented to show that the performance of our positivity-preserving scheme for the numerical simulation of radionuclide transport problem.
DOI: 10.1016/j.jcp.2010.01.035
发表时间: 2010-06
期刊: J. Comput. Phys.
影响因子: --
作者:
K. Lipnikov;D. Svyatskiy;Y. Vassilevski
通讯作者: K. Lipnikov;D. Svyatskiy;Y. Vassilevski
DOI: 10.1515/rjnamm.2009.014
发表时间: 2009
期刊: --
影响因子: --
作者:
A. Danilov;Y. Vassilevski
通讯作者: A. Danilov;Y. Vassilevski
多边形网格上对流扩散方程的保留极值原理的有限体积格式
DOI: 10.1002/fld.4366
发表时间: 2017
影响因子: 1.8
作者:
Zhang Qi;Sheng Zhiqiang;Yuan Guangwei
通讯作者: Yuan Guangwei
基于离散极大值原理的扩散问题菱形格式修复技术
DOI: 10.1002/fld.2746
发表时间: 2012-11
影响因子: 1.8
作者:
Li,Yonghai;Yuan,Guangwei;Wang,Shuai;Sheng,Zhiqiang
通讯作者: Sheng,Zhiqiang
DOI: 10.1002/nme.2335
发表时间: 2008-11
影响因子: 2.9
作者:
Sadok Lamine;M. Edwards
通讯作者: Sadok Lamine;M. Edwards