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Posted:
1 decade ago
2010年7月5日 GMT-4 08:05
Hi
You probably have version 4 because I wasn't able to open the model. So I don't know if this helps but...
With a porous area and a free flow around it, very little of the flow goes through the sphere. That is why the arrows are very very small inside the porous area (mass transfer happens mostly by diffusion).
To see the streamlines inside the porous area I had to select "uniform density" for the streamline plot instead of "magnitude controlled" or "start point controlled". I don't know if it is different in version 4.
Sorry but I have no idea about the animations.
Hi
You probably have version 4 because I wasn't able to open the model. So I don't know if this helps but...
With a porous area and a free flow around it, very little of the flow goes through the sphere. That is why the arrows are very very small inside the porous area (mass transfer happens mostly by diffusion).
To see the streamlines inside the porous area I had to select "uniform density" for the streamline plot instead of "magnitude controlled" or "start point controlled". I don't know if it is different in version 4.
Sorry but I have no idea about the animations.
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Posted:
1 decade ago
2010年7月6日 GMT-4 04:42
Cheers for the tips (and yeah, it's v4).
It's quite a problematic application, I haven't seen a decent model yet to be honest.. if anyone has sth like this it'd be grand to see it.
natalia
Cheers for the tips (and yeah, it's v4).
It's quite a problematic application, I haven't seen a decent model yet to be honest.. if anyone has sth like this it'd be grand to see it.
natalia
Ivar KJELBERG
COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted:
1 decade ago
2010年7月10日 GMT-4 12:00
Hi
I had a look, I noticed you are using stationary, that meas that any time depedent or transient changes will not show up, only the last final stage when your sphere is saturated.
by the way use "Streamline Positioning - Magnitude controlled" to get a better image.
Furthermore your case is so symmetric that you might use only 1/4 of the total area with symemtry/antisymmetry conditions it calculates quicker.
Then your input velocity is probably not that square, have you played with dirrerent in/oulet definitions ?
None of these answers directly your question, I'm afraid, probably I'm not catching what is wrong
If you are not interested in the liquide, only what is going inside the sphere, then select the physics (in V4), select the domain 1=liquide and hit the "hide" button
This adds a "Hide Geometric Entity" in the "Model - Definitions - View" node
and when you go back to your results 2D plot and do a "refresh" you will see the detaile scaled to your porous sphere
Good luck
Ivar
Hi
I had a look, I noticed you are using stationary, that meas that any time depedent or transient changes will not show up, only the last final stage when your sphere is saturated.
by the way use "Streamline Positioning - Magnitude controlled" to get a better image.
Furthermore your case is so symmetric that you might use only 1/4 of the total area with symemtry/antisymmetry conditions it calculates quicker.
Then your input velocity is probably not that square, have you played with dirrerent in/oulet definitions ?
None of these answers directly your question, I'm afraid, probably I'm not catching what is wrong
If you are not interested in the liquide, only what is going inside the sphere, then select the physics (in V4), select the domain 1=liquide and hit the "hide" button
This adds a "Hide Geometric Entity" in the "Model - Definitions - View" node
and when you go back to your results 2D plot and do a "refresh" you will see the detaile scaled to your porous sphere
Good luck
Ivar