On Feb 15, 2011, at 3:58 PM, Jorge Espinosa wrote:
>> Thanks a lot the equation i´m solving is (Tex):
>
> rs\frac{\partial V}{\partial s} + \frac{1}{2}\sigma^2 s^2\frac{\partial^2 V}
> {\partial s^2}+\frac{\partial V}{\partial t}-rV=0
>
> with final condition V(s,T)=(s_T-K)_+
>
> boundary con
Jonathan Guyer writes:
>
>
> On Feb 9, 2011, at 6:54 PM, Jorge Espinosa wrote:
>
> > Hi, im writting my thesis about options and i need to solve numerically a
couple
> > of non linear black scholes equations, im trying to do it with Fipy, first
> > i
> > tried with the simplest black scho
On Feb 15, 2011, at 2:40 PM, Yeung (Billy) Au wrote:
> Thank you Jonathan for your quick response.
>
> My matplotlib version is 1.0.0
>
> After editing line 124 of
> C:\Python25\lib\site-packages\fipy\viewers\matplotlibViewer\matplotlib2DGridViewer.py
> from "self.image.clim(vmax=datamax, vm
On Feb 15, 2011, at 11:22 AM, Julien Derr wrote:
> yes D is fixed, and the value on the polygon is always positive; Indeed, here
> is what I do;
>
> I have an old concentration field at one time step "OLDC" (all concentration
> is between 0 and 1). then I update the geometry of the polygon (i
On Feb 15, 2011, at 12:33 PM, Billy Au wrote:
> I have been trying to use FiPy to model a bottom-up filling process in narrow
> trenches.
>
> I have installed python (pythonxy) on a Windows Vista system, together with
> NumPy and PySparse. I had no problem running the diffusion examples (mesh
On Feb 15, 2011, at 1:05 PM, Julien Derr wrote:
> so if I understand well it is not possible for now, to impose that the
> gradient of the concentration field would be normal to the face?
If you are using trunk/ then you can do it with .constrain(), but if you are
using a released version the
Thanks a lot Daniel,
so if I understand well it is not possible for now, to impose that the
gradient of the concentration field would be normal to the face?
On Tue, Feb 15, 2011 at 6:33 PM, Daniel Wheeler
wrote:
>
> On Mon, Feb 14, 2011 at 9:36 AM, Jonathan Guyer wrote:
>
> >> I don't really u
On Mon, Feb 14, 2011 at 9:36 AM, Jonathan Guyer wrote:
>> I don't really understand, the gradient of the concentration field is not
>> necessarly normal to the side ? or is it ?
It isn't necessarily normal. However, for a regular isotropic
diffusion coefficient, only the normal component of th
Hi Joshua,
yes D is fixed, and the value on the polygon is always positive; Indeed,
here is what I do;
I have an old concentration field at one time step "OLDC" (all concentration
is between 0 and 1). then I update the geometry of the polygon (it increases
its size a little bit)
I create a new m
Julien,
Would you mind giving us more information?
Is D a fixed value? What is the center polygon's initial concentration
value?
On Feb 15, 2011 6:29 AM, "Julien Derr" wrote:
> Hi all,
>
> I am still bothering you with my simple diffusion problem between an outer
> circle (Boundary condition
Hi all,
I am still bothering you with my simple diffusion problem between an outer
circle (Boundary condition value=1)
and an inner polygon (Boundary flux=0)
I am getting negative values on the concentration field !!
a simple diffusion process (eq = TransientTerm() ==
DiffusionTerm(coeff=D))
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