Emilio Melero García wrote:
Hi everyone!!
I have a question to all of you see if any of you can help me. I am
concerned with a problem in which the volumes defining my domain should
change with time (trying to model very simplistic crystal nucleation and
growth). Any suggestion of how can i try it with ff3d? do you know of
any other free FEM code that would allow this?
Hello.
A short answer is yes. However a better description of the problem that
you want to solve would help.
1) If you have a tetrahedrized mesh of your problem, you can use the
'transform' keyword to compute a new mesh and then solve your equation
with it : if 'm' is a (tetrahedrized) mesh
m = tetrahedrize([f1,f2,f3],m);
will use the field [f1,f2,f3] to move the nodes of the mesh 'm' and will
store it in a new version of 'm'
2) if you want to use fictitious domain method, it is implemented only
if you use an analytic description of the domain (not POVRay) :
for instance for a sphere centered in 0 and of radius 1
domain d; // domain is undefined here
function ki = one(sqrt(x^2+y^2+z^2));
d = domain(ki>0.5);
then solve your PDE using the domain 'd'.
Then if you can compute a new 'ki' you can redefine the domain in a loop
for instance.
The modification of a povray file is not possible up to now but it will
be implemented in the future.
I hope that helps.
Best regards,
Stephane.
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