An Evaluation of Linearly Implicit Time Discretization Methods For Approximating Richards' Equation

Eleanor Jenkins, Cass Miller, Matthew Farthing, Christopher Kees & Matthew Farthing
The solution of Richards' equation and two-phase air/water models for flow in porous media continues to be a challenge for many problems of interest. Typically, fully implicit time discretizations are preferred due to the strong, potentially degenerate nonlinearities that result from standard constitutive relationships. Recently however, there has been renewed interest in linearly implicit methods, since they avoid the solution of full nonlinear problems, while retaining desirable stability properties over explicit discretizations. In this work,...
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