bubble column

ken · December 23, 2010, 07:50

Hi, I am still new to fluent and would like to seek advice on the simulation.

Currently, I would like to simulate 3D bubble column with VOF. My dimension of the column is height=60cm, diameter=20cm. My mesh size is around 60k cells, is that sufficient to capture the bubble formation? Can I actually get the 3D fluent tutorial from online? I know there is one for 2D bubble column, but for 3D, I am trying to get the animation for the bubble formation. Anyone can give me some advice?

I know that I have to specify surface tension, and I search online the normal value would be 0.072N/m2, is that right? What velocity do I need to set?

I think bubble column is not a hot topic and the simulation has been done for years. If you have one, do you mind to share your experience and result?

hossein65 · June 30, 2013, 02:18

60k mesh is too fine, you have to set the mesh size according to the hole size of the sparger. but as a default, I usually set the mesh size to 1mm. 0.0735 for surface tension would be fine.

December 23, 2010, 07:50	bubble column	#1
ken New Member ken Join Date: Dec 2010 Posts: 5 Rep Power: 15	Hi, I am still new to fluent and would like to seek advice on the simulation. Currently, I would like to simulate 3D bubble column with VOF. My dimension of the column is height=60cm, diameter=20cm. My mesh size is around 60k cells, is that sufficient to capture the bubble formation? Can I actually get the 3D fluent tutorial from online? I know there is one for 2D bubble column, but for 3D, I am trying to get the animation for the bubble formation. Anyone can give me some advice? I know that I have to specify surface tension, and I search online the normal value would be 0.072N/m2, is that right? What velocity do I need to set? I think bubble column is not a hot topic and the simulation has been done for years. If you have one, do you mind to share your experience and result?

June 30, 2013, 02:18		#2
hossein65 Member Hossein Join Date: Oct 2010 Location: Greensboro, NC, USA Posts: 30 Rep Power: 16	60k mesh is too fine, you have to set the mesh size according to the hole size of the sparger. but as a default, I usually set the mesh size to 1mm. 0.0735 for surface tension would be fine. __________________ Hossein Amini PhD student in Biochemical Engineering; Computational Science and Engineering department; North Carolina Agricultural and Technical State University

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