Dear Dumux Community, 

I'd like to ask you a quick question about residual saturation, which may seem 
trivial to you. 

In one of my simulations that considers two-phase flow (CO2 model), I set: 

Swr = 0.3 
Snr = 0.05 

When I look at the liquid saturation solution obtained, it is given between 0 
<= S_w <= 1. Why the minimum value reached by this liquid saturation is 0 ? 
Shouldn't it be Sw = 0.3 instead with the residual liquid saturation ? 

Is the output saturation represented by the effective saturation instead of the 
real liquid saturation ? 

I tested the same parameters in the co2 model provided in the Dumux tests and 
it appears to be the same behaviour. The saturation exceeds the residual 
saturation. 

I also noticed that this minimum saturation value is different for several mesh 
sizes. Does this seem consistent to you? 

Thank you in advance for your answers. 

Best regards, 

Nicolas Pillardou 
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