Ivar KJELBERG
COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted:
1 decade ago
16 juin 2010, 15:27 UTC−4
Hi
if I understand you well you have several spheres around the same centre, or a layer of thick "onions" shells. At least that is also what I expect you will obtain, once "analysed" (after the "Finish" in V4).
To be able to select them easier, try the transparency option, or select them via their ID, then you can also "hide items" to select further "inside".
One thing to take care of: is the relative sizes (order of magnitudes of their respective radii) and to define how many elements you have/will get, just to be sure you stay within you RAM limits
Have fun Comsoling
Ivar
Hi
if I understand you well you have several spheres around the same centre, or a layer of thick "onions" shells. At least that is also what I expect you will obtain, once "analysed" (after the "Finish" in V4).
To be able to select them easier, try the transparency option, or select them via their ID, then you can also "hide items" to select further "inside".
One thing to take care of: is the relative sizes (order of magnitudes of their respective radii) and to define how many elements you have/will get, just to be sure you stay within you RAM limits
Have fun Comsoling
Ivar
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
17 juin 2010, 12:58 UTC−4
Thanks Ivar,
Yes I'm trying to make an onion type of problem. I am able to select the proper spheres to give them their respective properties (I used wireframe and/or ID).
The sizes of the layers are small, and relative to one another. I have around 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm radii layers.
So if I'm reading this correctly, ID1 (smallest sphere) will by the only "sphere" with properties, and the others will actually be shells of spheres. This is what I am hoping to make. This configuration is a type of nuclear fuel which has uranium dioxide in the center, and layers built up around this initial kernel. So hopefully I'll be able to model this fuel properly. Now I just need to create a material library entry for uranium oxide.
Thanks again.
Thanks Ivar,
Yes I'm trying to make an onion type of problem. I am able to select the proper spheres to give them their respective properties (I used wireframe and/or ID).
The sizes of the layers are small, and relative to one another. I have around 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm radii layers.
So if I'm reading this correctly, ID1 (smallest sphere) will by the only "sphere" with properties, and the others will actually be shells of spheres. This is what I am hoping to make. This configuration is a type of nuclear fuel which has uranium dioxide in the center, and layers built up around this initial kernel. So hopefully I'll be able to model this fuel properly. Now I just need to create a material library entry for uranium oxide.
Thanks again.
Ivar KJELBERG
COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
18 juin 2010, 01:37 UTC−4
Hi
when you say shell, you mean a 3D volume ? then the answer is yes,
not to confuse with the sphere surface (= surface shell). Both are possible but in 3D you have the volume = subdomains you must define too, in addition you can add surface properties (2D)
have fun Comsoling
Ivar
Hi
when you say shell, you mean a 3D volume ? then the answer is yes,
not to confuse with the sphere surface (= surface shell). Both are possible but in 3D you have the volume = subdomains you must define too, in addition you can add surface properties (2D)
have fun Comsoling
Ivar