A mass-transfer particle-tracking method for simulating transport with discontinuous diffusion coefficients
A mass-transfer particle-tracking method for simulating transport with discontinuous diffusion coefficients
复制标题
一种模拟不连续扩散系数输运的传质粒子跟踪方法
DOI:
10.1016/j.advwatres.2020.103577
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发表时间:
2020
影响因子:
4.7
通讯作者:
Bolster, Diogo
中科院分区:
文献类型:
--
作者:
Schmidt, Michael J.;Engdahl, Nicholas B.;Pankavich, Stephen D.;Bolster, Diogo
The problem of a spatially discontinuous diffusion coefficient (D(x)) is one that may be encountered in hydrogeologic systems due to natural geological features or as a consequence of numerical discretization of flow properties. To date, mass-transfer particle-tracking (MTPT) methods, a family of Lagrangian methods in which diffusion is jointly simulated by random walk and diffusive mass transfers, have been unable to solve this problem. This manuscript presents a new mass-transfer (MT) algorithm that enables MTPT methods to accurately solve the problem of discontinuousD(x). To achieve this, we derive a semi-analytical solution to the discontinuousD(x) problem by employing a predictor-corrector approach, and we use this semi-analytical solution as the weighting function in a reformulated MT algorithm. This semi-analytical solution is generalized for cases with multiple 1D interfaces as well as for 2D cases, including a 2 × 2 tiling of 4 subdomains that corresponds to a numerically-generated diffusion field. The solutions generated by this new mass-transfer algorithm closely agree with an analytical 1D solution or, in more complicated cases, trusted numerical results, demonstrating the success of our proposed approach.
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DOI:
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发表时间:
1970
期刊:
影响因子:
--
作者:
K. Semra;R. Mosé
通讯作者:
R. Mosé
DOI:
10.1023/a:1015083111971
发表时间:
2002-05-01
期刊:
MATHEMATICAL GEOLOGY
影响因子:
--
作者:
Hoteit, H;Mose, R;Ackerer, P
通讯作者:
Ackerer, P
影响因子:
4.7
作者:
Benson, David A.;Pankavich, Stephen;Schmidt, Michael J.;Sole-Mari, Guillem
通讯作者:
Sole-Mari, Guillem
影响因子:
4.7
作者:
G. Sole‐Mari;D. Bolster;D. Fernàndez‐Garcia;X. Sanchez‐Vila
通讯作者:
X. Sanchez‐Vila
DOI:
10.1016/j.jcpx.2019.100021
发表时间:
2018
期刊:
J. Comput. Phys. X
影响因子:
--
作者:
Michael J. Schmidt;S. Pankavich;A. Navarre‐Sitchler;D. Benson
通讯作者:
D. Benson