Computing Internodal Conductivities in Numerical Modeling of two Dimensional Unsaturated Flow on Rectangular Grid

Archives of civil engineering

A. SzymkiewiczGdansk University of Technology, Faculty of Civil and Environmental Engineering, Department of Geotechnics, Geology and Marine Engineering, ul. Narutowicza 11/12, 80-233 GdanskEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹  K. BurzynskiGdansk University of Technology, Faculty of Civil and Environmental Engineering, Department of HydrotechnicsEmailOther articles by this author:De Gruyter OnlineGoogle Scholar² 

[1] Gdansk University of Technology, Faculty of Civil and Environmental Engineering, Department of Geotechnics, Geology and Marine Engineering, ul. Narutowicza 11/12, 80-233 Gdansk;Gdansk University of Technology, Faculty of Civil and Environmental Engineering, Department of Hydrotechnics

关键词: Keywords: unsaturated zone;    Richards’ equation;    hydraulic conductivity;    finite difference method;    finite volume method;   

DOI  :  10.2478/v.10169-011-0016-2

学科分类：建筑学

来源: Polska Akademia Nauk * Instytut Podstawowych Problemow Techniki / Polish Academy of Sciences, Institute of Fundamental Technological Research

【 摘 要 】

This paper compares numerical solutions of transient two-dimensional unsaturated flow equation by using different averaging schemes for internodal conductivities. Averaging methods such as arithmetic mean, geometric mean, upstream weighting, and integrated mean are taken into account, as well as a recent approach based on steady-state approximation. The latter method proved the most flexible, producing relatively accurate solutions for both downward and upward flow cases.

【 授权许可】

Unknown