Hello Daniel,
Thanks for the insight, having a large project which is still light weight and
transparent is a challenge so I understand that approach.
My interest in the CV approach came about because my 1D FVM code fails when
trying to solve a particular electrostatics problem. I coded up the
My tests show the coupled variant is actually faster (with Trilinos).
As mentioned in ticket 658, the PySparse LU solver uses a lot of memory for
this problem (it always uses a lot, but it's particularly high here). It's
generally quite fast, but if it needs a substantial fraction of the RAM on
Oops. I missed that I was on the hook for code review. I've merged and pushed
to develop. Thanks for pointing this out.
On Jan 16, 2014, at 2:44 PM, Charles Reid
wrote:
> Hi all,
>
> FYI, I just noticed this was also reported as an issue on Trac
> (http://matforge.org/fipy/ticket/658) and so
On Wed, Jan 15, 2014 at 5:15 PM, Benjamin Hepp
wrote:
> Hello,
>
> my question from a few days ago might have been a bit imprecise. I
> reformulate it and hope this helps:
>
> I could not find any details in the FiPy documentation so I assume it is
> using first order Lagrange elements psi_i, wher
On Thu, Jan 16, 2014 at 1:17 PM, Charles Reid wrote:
> Hi there,
>
> I've managed to resolve the issues I was having. It came down to a problem
> with the type of the convection coefficient object. I was able to create a
> convection coefficient matrix by creating a list of size
> (1,Nvariables,Nv
On Mon, Jan 13, 2014 at 10:33 PM, boyfarr...@gmail.com
wrote:
> Dear list,
>
> When reading through the FiPy docs,
> http://www.ctcms.nist.gov/fipy/documentation/numerical/discret.html
>
> I noticed that discussion of vertex centred (CV) and cell centred (CC)
> meshes. I'm just curious, why did
Hi all,
FYI, I just noticed this was also reported as an issue on Trac (
http://matforge.org/fipy/ticket/658) and solved at a better/more upstream
location (
http://matforge.org/fipy/changeset/2f015d7d9acd1953462a93a52e03c18303c8e2a6/fipy).
But it doesn't look like that's made it to the main git b
Hi,
I noticed that if I am solving a vector equation, running sweep() instead
of solve() raises an error from the pysparseMatrix class's multiplication
method. I looked deeper into the error and found that the problem was that
a square matrix and a vector, both with the same number of total elemen
I'm using PySparse
On Jan 15, 2014, at 10:27 PM, Guyer, Jonathan E. Dr. <
jonathan.gu...@nist.gov> wrote:
> On Jan 14, 2014, at 2:05 PM, Jane Hung wrote:
>
>> The vector formulation is still rather slow (much much slower than with
just one equation). Is that expected?
>
>
> I'm not sure. We'll d
On Fri, Jan 10, 2014 at 10:27 AM, Benjamin Hepp
wrote:
> Hello,
>
> I have a diffusion problem: u_t = D * u_{xx}
> Is there any way to extract the mass and stiffness matrices from FiPy
> after everything has been setup?
I'm not sure what the mass and stiffness matrices are in the Finite
Volume me
Hi there,
I've managed to resolve the issues I was having. It came down to a problem
with the type of the convection coefficient object. I was able to create a
convection coefficient matrix by creating a list of size
(1,Nvariables,Nvariables), and passing that as the coefficient. (Note that
the sa
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