how to capture free surface cells?

MichaelVS · November 14, 2013, 09:26

Dear Colleagues,

I would be grateful is someone advise me how I can capture the free surface cells (cells on free surface).

I use VOF model in ANSYS Fluent and I need to set up thermal conditions for the free surface between two fluids.
As i understand, the free surface is the surface with 0,5 volume fraction value (of one of the fluids in the domain).
So, I made an attempt to capture iso-value of volume fraction between 0,4 and 0,6 but no cells are marked (adapt >iso-value...). However, I can capture the iso surface 0,5 (surface>iso-surface)which is in fact the free surface I am looking for. However, I cannot set up boundaries for this iso-surface 0,5 as it doesn't appear in the list of zones (boundary conditions) or in the zones to patch (solution initialization).

How could this be done?
I would be grateful for any suggestions!

wanli · June 10, 2015, 02:18

The same problem occurred to me, and I am trying to solve this problem. Did you solve it?

November 14, 2013, 09:26	how to capture free surface cells?	#1
MichaelVS New Member anonymous Join Date: Nov 2013 Posts: 9 Rep Power: 12	Dear Colleagues, I would be grateful is someone advise me how I can capture the free surface cells (cells on free surface). I use VOF model in ANSYS Fluent and I need to set up thermal conditions for the free surface between two fluids. As i understand, the free surface is the surface with 0,5 volume fraction value (of one of the fluids in the domain). So, I made an attempt to capture iso-value of volume fraction between 0,4 and 0,6 but no cells are marked (adapt >iso-value...). However, I can capture the iso surface 0,5 (surface>iso-surface)which is in fact the free surface I am looking for. However, I cannot set up boundaries for this iso-surface 0,5 as it doesn't appear in the list of zones (boundary conditions) or in the zones to patch (solution initialization). How could this be done? I would be grateful for any suggestions! habibbuet08 likes this.

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June 10, 2015, 02:18		#2
wanli New Member wanli Join Date: Jun 2015 Posts: 1 Rep Power: 0	The same problem occurred to me, and I am trying to solve this problem. Did you solve it?