VOF and gravity effect

sirpolar · July 31, 2015, 12:20

Hi every one

I ma using VOF for two phase flow, but when I enable gravity effect it has no effect at all. I was wondering if somebody could help me

For example consider a column filled with water, and another fluid is entering from the bottom of column, I expect that with enabling gravity I can see the hydrostatic pressure of water in the column, but it seems that the gravity has no effect on the pressure distribution at all.

Regards
sirpolar

FJSJ · August 3, 2015, 08:15

Hi Ebrahim,

I suppose that you are defining the lightest phase density as Specified Operating Density at the same time you define the gravity. In case yo have a compressible flow you need to specify 0 as value for that field.

July 31, 2015, 12:20	VOF and gravity effect	#1
sirpolar Member Ebrahim Join Date: Feb 2014 Posts: 57 Rep Power: 12	Hi every one I ma using VOF for two phase flow, but when I enable gravity effect it has no effect at all. I was wondering if somebody could help me For example consider a column filled with water, and another fluid is entering from the bottom of column, I expect that with enabling gravity I can see the hydrostatic pressure of water in the column, but it seems that the gravity has no effect on the pressure distribution at all. Regards sirpolar

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August 3, 2015, 08:15		#2
FJSJ Senior Member Javi Join Date: Jan 2013 Posts: 276 Rep Power: 16	Hi Ebrahim, I suppose that you are defining the lightest phase density as Specified Operating Density at the same time you define the gravity. In case yo have a compressible flow you need to specify 0 as value for that field.