Hello,
I'm new to both FiPy and Gmsh.
after days of struggling with solving Laplace eq. for a 3D space and a
sphere,
with robin boundary condition on the sphere's surface, and fixed value b.c.
near "infinity",
I think it is time I'd ask for advice:
given a sphere with radius r=R,
and the B.Cs:
1. -\alpha c + \frac{\partial c}{\partial r}= 0 , where r=R
2. c=0 , where r>>R
I want to solve Laplace equation: {\nabla^2 c = 0}
outside the sphere.
now, what would be the better approach? and how can I overcome the following
problems?
1.generate a sphere using gmsh.
define the robin BC using getExteriorFaces() on the sphere's surface.
the problem: how can I define BC near infinity? (r>>R), e.g. for R=1,
r=100 is infinite enough.
2. generate a sphere with spherical hole in the middle.
define the BC in the "infinity" using getExteriorFaces()
the problem: how can i define the robin BC on the inner hole-sphere
surface?
or is there a better way?
I would really appreciate your help,
thank you,
Mor
BGU University, physics dep.
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