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[ANSYS Meshing] modify sizing locally

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Old   December 13, 2014, 15:41
Default modify sizing locally
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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
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Old   December 14, 2014, 21:27
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Hi Ema,

You gave the answer urself

Quote:
What is the sphere of influence?
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
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Old   December 15, 2014, 04:54
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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
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Old   December 15, 2014, 18:41
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Quote:
Originally Posted by Ema40 View Post
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
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Old   December 16, 2014, 03:54
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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
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Old   December 16, 2014, 17:52
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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
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Old   December 17, 2014, 07:16
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Thank you for spending your time to help me.
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Old   December 19, 2014, 03:56
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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
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Old   December 19, 2014, 04:13
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I solved. Thank you
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Old   December 7, 2015, 02:51
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Thanks a lot Kapi. That was helpful
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Old   February 17, 2017, 06:46
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good morning
while i using sphere of influenc option,,i cant able to edit the element size??
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