the Richards Equation for Variably Saturated Flows
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An Efficient Solver for the Richards Equation for Variably Saturated Flows in Porous Media
Announce Type: new Abstract: We present a nonlinear multigrid solver for the Richards equation in variably saturated porous media with strongly nonlinear hydraulic conductivity and water-retention relationships. The governing equation is discretized using a second-order conservative finite-difference scheme in space and an implicit backward differentiation formula in time. The core component of the solver is a nonlinear Gauss--Seidel (NGS) smoother based on a triangular splitting of the...