modify sizing locally
 

Hi everybody.

I have a domain divided in different parts. I want to reduce the mesh sizing not in the whole of the parts, but only in a subvolume of a particular part.

What do I have to do?
What is the sphere of influence?

Thank you very much

Hi Ema,

You gave the answer urself

Once you know which particular areas you want sizing, you can either select that edge or face and give sizing with element size or you can give sphere of influence.
Once you select sizing>Type, under drop down menu is sphere of influence.
You can make new coordinates where you want this sphere of influence, select new coordinates give the radius of sphere. You will be able to see the sphere on your geometry and you can change size depending upon which parts are to me sized to a given element size.

Hope I explained clearly.

Cheers
KAPI

Thank you very much. There is only a problem; in Sphere Center the only available option is Global Coordinate System, so I can locate the sphere center in (0,0,0) and not in other position. How can I do this?

Thank you

You can create new coordinate system by right click on Model>Coordinate Systems and select Insert new coordinate system. Now you can create your new coordinate system anywhere you want by selecting, Geometry: point/edge/face/body or even by Named selection.

Hope this helps,

Cheers
KAPI

Thank you very much. Then, when in Fluent I have to insert the coordinates of the free surface in the boundary conditions, the coordinate system used as referement will be always the global?

Thank you

Yes! in fluent the coordinates will be global

these coordinates you are making r specifically for mesh sizing and will not play role as reference coordinates.


Cheers
KAPI

Thank you for spending your time to help me.

I have done the sphere of influence and it is ok. I imposed the sphere radius 0.05 m and element size of 0.02 m (in order to avoid 2 elements with high aspect ratio). So, the number of tetra elements in this sphere have to be about 200. But when I update the mesh the number of elements increases of 250000!! Why?

Thank you

I solved. Thank you

Thanks a lot Kapi. That was helpful

good morning
while i using sphere of influenc option,,i cant able to edit the element size??

yes u can change element size