Hello there

I was wondering if I could get some feedback and pointers on what work and dont 
in the 3p3c solver regarding gas dissolution in napl phase. [ and gas diffusion 
as well].

Looking at the code I notice that:

1- No gas dissolution is allowed in NAPL  (xna = 1e-10 while it could be 
something like
xna= xgg * pg_  / (FluidSystem::fugacityCoefficient(fluidState_, 
wPhaseIdx,gCompIdx) * pn_); )

2....itt SEEMS pretty easy to add ( to easy?)
Putting the proper value for xna in 3p3cvolume variable.hh should do the job

or use  the multicomposotional solver


The fact that these "apparently easy solution" are disabled puzzle me.  So my 
question:

 What are the reasons (if any) that this feature is explicitely not available?

(The fact that this is mentionned in the comments means that somebody gave it 
some thoughts and decided not to do it...)

On the other hand, if it is just a matter of spending some time and doing some 
testing I can do it and let you know what I find....

I will just appreciate to have some pointers : what is known to work ( or dont 
work) in order  to avoid wandering in dead end that I could avoid....

Thanks a lot in advance...

Jean-Francois
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