Numerical modelling of groundwater radionuclide transport with finite difference-based method of lines
Küçük Resim Yok
Tarih
2023
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the advection-dispersion equation with decay is numerically solved by the finite difference-based method of lines (FD-MOL) to simulate groundwater radionuclide transport. Finite difference orders of 1,2,.,8 are used for spatial approximation, while the linearly implicit Euler scheme is employed adaptively for temporal discretization. Four different problems are investigated, and results show that FD-MOL provides accurate and stable numerical solutions. Coarse temporal grids can be utilized implicitly, for instance, a maximum step of 1000 years with 400 spatial nodes yields RMS errors of 7.508 x 10(-6), 7.395 x10(-5) and 7.705 x10(-6) in (234) (92) U, (230) (90) Th and (226) (88) Ra normalized concentrations, respectively, for the decay chain problem.
Açıklama
Anahtar Kelimeler
Groundwater radionuclide transport, Finite difference, Method of lines, Adaptive temporal differencing, Implicit scheme
Kaynak
Journal of Radioanalytical and Nuclear Chemistry
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
332
Sayı
11
