Hollow sphere with setFields

dolfus · May 3, 2019, 10:46

Hello all,

I'm triying to simulate a drop of water surrounded by a fine layer of oil. Using setFields in 2D this would a water cylinder inside an oil annulus cylinder wich works perfectly.

In 3D it's clear that the geometry would be a sphere of water inside a hollow sphere of oil, and that's the problem because it doesn't seem that setFields support this arrangement.
So I don't know if maybe usinG surfaceToCell or any option like that would work for this case (the point is that i guess there are many solutions to this problem and I'm not able to check it all).

Thank you in advance,

Adolfo

alexeym · May 3, 2019, 12:29

Hi,

You have several possibilities:

1. Create cellSet with topoSet utility and then use cellToCell in setFieldsDict.

2. Use setFields with two different dictionaries. The first creates outer sphere, the second creates inner sphere (by overwriting values inside outer sphere).

3. Create STL surface of the spherical layer and use surfaceToCell.

The easiest is the second variant.

May 3, 2019, 10:46	Hollow sphere with setFields	#1
dolfus New Member Join Date: Feb 2019 Posts: 23 Rep Power: 7	Hello all, I'm triying to simulate a drop of water surrounded by a fine layer of oil. Using setFields in 2D this would a water cylinder inside an oil annulus cylinder wich works perfectly. In 3D it's clear that the geometry would be a sphere of water inside a hollow sphere of oil, and that's the problem because it doesn't seem that setFields support this arrangement. So I don't know if maybe usinG surfaceToCell or any option like that would work for this case (the point is that i guess there are many solutions to this problem and I'm not able to check it all). Thank you in advance, Adolfo

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May 3, 2019, 12:29		#2
alexeym Senior Member Alexey Matveichev Join Date: Aug 2011 Location: Nancy, France Posts: 1,938 Rep Power: 39	Hi, You have several possibilities: 1. Create cellSet with topoSet utility and then use cellToCell in setFieldsDict. 2. Use setFields with two different dictionaries. The first creates outer sphere, the second creates inner sphere (by overwriting values inside outer sphere). 3. Create STL surface of the spherical layer and use surfaceToCell. The easiest is the second variant.