Analysis of eigenvalues for vadose-zone models

Lea Jenkins, Matthew Farthing, Chris Kees & Lea Jenkins
In this work, we address computational issues associated with using two-phase, air-water models and Richards' equation for vadose-zone simulations. Despite significant effort devoted to identifying efficient numerical approaches for these models, simulation of realistic three-dimensional problems remains challenging. While ongoing research continues to assess the validity of the physical assumptions underlying standard two-phase models and Richards' equation, we focus here on computational reasons for preferring one model over the other in cases where each is...
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