کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4641092 | 1341296 | 2010 | 11 صفحه PDF | دانلود رایگان |
This paper presents a numerical solution to the equations describing Darcian flow in a variably saturated porous medium—a classical Richards’ equation model Richards (1931) [1] and an extension of it that approximates the flow in media with preferential paths—a dual porosity model Gerke and van Genuchten (1993) [8]. A numerical solver to this problem, the DRUtES computer program, was developed and released during our investigation. A new technique which maintains an adaptive time step, defined here as the Retention Curve Zone Approach, was constructed and tested. The aim was to limit the error of a linear approximation to the time derivative part. Finally, parameter identification was performed in order to compare the behavior of the dual porosity model with data obtained from a non-homogenized fracture and matrix flow simulation experiment.
Journal: Journal of Computational and Applied Mathematics - Volume 233, Issue 12, 15 April 2010, Pages 3167–3177