Posted Tue, 05 Jun 2018 09:30:41 GMT by Hugo Ninanya Geomechanics Engineer
Good day everybody!!!!
I look forward someone can help me.
I developed a numerical model in FEFLOW (transient), which simulates the infiltration of rainfall in a natural slope, considering unsaturated soil (Van Genuchtem modified Model) and discrete features. It was monitored three points (see Fig.1). The convergence of the simulation was good (dt_max=1d), however, as the time-step size (max) was reduced to a smaller value (like 0.5, 0.1, 0.05 or 0.01), the pressure history curves showed more oscillations. The aim of simulating the model with a smaller time step size was for obtaining a smoother curve, in place of that, it was obtained a curve with more oscillations.
I am attaching all results (pressure history for three points, which are indicated in the Fig.2,3 and 4)

Kind Regards,

Hugo Ninanya
Posted Tue, 12 Jun 2018 05:50:39 GMT by Björn Kaiser
It's difficult to give recommendations without knowing the details of the model. I suggest to contact the FEFLOW Support:

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