yade-dev team mailing list archive

[Christian Jakob <jakob@xxxxxxxxxxxxxxxxxxx>]

The decrease of meniscii volume happens, because liquid bridges were  
erased during the simulation (set isBroken = True ;)

I am using getCapillaryStress(triax.boxVolume) maybe the problem is in  
boxVolume? maybe it is zero ... I will check that.


Zitat von Jerome Duriez <Jerome.Duriez@xxxxxxxxxxx>:

> Hi Christian, thank you for the confirmation and the figures. Could  
> you please comment them a little, so that I get the problem they  
> show ? In fact, I would deduce from them that there is a problem for  
> Pc* < 1000, where the water volume starts to decrease when suction  
> decreases, whereas I would wait for continuous increase of the water  
> volume (= saturation ratio) in this case..
>
> And I was not aware there could be problem with getCapillaryStress :  
> as for me, I can use it without problems..
>
>
> ________________________________________
> From: Yade-dev  
> [yade-dev-bounces+jerome.duriez=ucalgary.ca@xxxxxxxxxxxxxxxxxxx] on  
> behalf of Christian Jakob [jakob@xxxxxxxxxxxxxxxxxxx]
> Sent: November 13, 2014 5:36 AM
> To: yade-dev@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Yade-dev] Some cleaning in capillary law : data files validity
>
> Hi,
>
> I followed your discussion on capillary law and I can confirm, that
> the meniscii volume is not correct for a suction higher than 1500. In
> my simulations I reduce suction from 5000 to 0 and erase liquid
> bridges from bottom to top of the model (see attachment). The
> calculation of forces seems to be uneffected (see sum of cap. forces).
>
> Thanks for spoting this!
>
> Christian
>
> btw, getCapillaryStress() is still not working (see file)...
>
>
> Zitat von Bruno Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>:
>
> > On 10/11/14 20:00, Jerome Duriez wrote:
> > > Ok. I'm getting zero water volume for contacting spheres for an
> > > adimensionned capillary pressure Pc* =  1500 +/- 5 (the minimum
> > > adimensionned water volume seems to be ~ 2.6e-6)
> > Great. It means that 1500 was probably the max value when generating the
> > data files.
> > There could be a warning in the code if Pc*>=1500, but it is only
> > relevant for a specific set of data files...
> > The max should be defined automatically when reading the data.
> >
> > B
>
>
>
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