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
On Fri, Jan 10, 2014 at 10:27 AM, Benjamin Hepp
benjamin.h...@bsse.ethz.ch 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
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 jyh...@mit.edu wrote:
The vector formulation is still rather slow (much much slower than with
just one equation). Is that expected?
I'm not sure.
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
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
On Mon, Jan 13, 2014 at 10:33 PM, boyfarr...@gmail.com
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
On Thu, Jan 16, 2014 at 1:17 PM, Charles Reid charlesre...@gmail.com 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
On Wed, Jan 15, 2014 at 5:15 PM, Benjamin Hepp
benjamin.h...@bsse.ethz.ch 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
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
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
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