Mass conservative BDF-discontinuous Galerkin/explicit finite volume schemes for coupling subsurface and overland flows
Mass conservative BDF-discontinuous Galerkin/explicit finite volume schemes for coupling subsurface and overland flows
复制标题
用于耦合地下和地面流的质量保守 BDF-不连续 Galerkin/显式有限体积方案
DOI：
10.1016/j.cma.2009.02.024
复制
发表时间：
2008
影响因子：
7.2
通讯作者：
S. Piperno
中科院分区：
文献类型：
--
作者：
P. Sochala;A. Ern;S. Piperno
Robust and accurate schemes are designed to simulate the coupling between subsurface and overland flows. The coupling conditions at the interface enforce the continuity of both the normal flux and the pressure. Richards’ equation governing the subsurface flow is discretized using a backward differentiation formula and a symmetric interior penalty discontinuous Galerkin method. The kinematic wave equation governing the overland flow is discretized using a Godunov scheme. Both schemes individually are mass conservative and can be used within single-step or multi-step coupling algorithms that ensure overall mass conservation owing to a specific design of the interface fluxes in the multi-step case. Numerical results are presented to illustrate the performances of the proposed algorithms.
