Hi Daniel,
Thank a lot, it is really nice to have a reply so fast, i'll try again
olivier
Le 25/09/2014 04:32, Daniel Wheeler a écrit :
Hi Olivier,
I fixed up the script a bit
https://gist.github.com/wd15/030fd25b9f19ef0ec4ec
It at least runs without errors now. The main change was the
replacement of the tuple of CellVariables passed to the diffusion and
convetion term with single CellVariables, but with the the shape of
rank 1 tensors (vectors). Passing tuples of CellVarialbes in FiPy to
the terms doesn't really work correctly. In the diffusion term it
invokes a biharmonic (fourth order diffusion term) and in the
convection term it only works if each of the entries is single valued
(not an array or variable of any kind).
The other thing is that I changed the CellVariables to FaceVariables
since it makes sense to evaluate the coefficients directly at the
faces rather than interpolating from the cell centers. I noticed that
the velocity depends on 1 / R so I had to finesse this for R=0 faces,
you may want to think about that a bit.
I have no idea whether the results are correct, but at least you can
do some analysis now.
Cheers,
Daniel
On Wed, Sep 24, 2014 at 2:04 AM, olivier atteia <olivier.att...@ipb.fr
<mailto:olivier.att...@ipb.fr>> wrote:
Dear all,
i set a problem with a cylindrical2D grid, it is composed, in the
vertical direction of two layers, in the lower one there is a
velocity from the center well to the outside,in the upper, the
velocity is negligible. A concentration is injected in a well
located at the center.
as it is in a porou medium, there is dispersion, which is
proportional to velociaty. This dispersion has two different
compounds in the radial and in the vertical direction. For this, i
use two cellVariable (D2 and D2) and i set the coeff in the
diffusion term as (D1.faceValue,D2.faceValue)
The BC at the outlet for the concentration is a null gradient
I tried two BC for the injection well : 1, where=mesh.faceLeft and
where=[0] it does not change
my problem :
when i run the solve command, iget this :
ValueError: The truth value of an array with more than one element
is ambiguous. Use a.any() or a.all()
the file is enclosed
thanks
olivier
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Daniel Wheeler
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