Question for VOF users

thecfduser · December 8, 2009, 03:05

Hello dear Colleagues,
when dealing with VOF in Fluent, we see that FLUENTS calculate residuals for continuity and momentum equations....but not for the volume fraction equation...Can anyone tell me why???
This last equation is also resolved no???

Thanks for help
Regards

Philipov · December 8, 2009, 07:45

As you know continuity and volume fraction are in close relation. the residuals on continuity are the same for the volume fraction (I think so... there is a logic...)

thecfduser · December 8, 2009, 14:24

No....the proof, take a look to residuals in an eulerian model (Fluent's eulerian). U will see that the volume fraction residuals are monitored too

Goldsstean · December 9, 2009, 03:43

The tracking interface is accomplished by the solution of continuity for the VOF. tat y showing only continuity equation with momentum.

thecfduser · December 10, 2009, 13:35

Thank u
If u understood good, u are saying that VOF solves NS and the continuity equation only?
4 equations and not 5?
Regards

December 8, 2009, 03:05	Question for VOF users	#1
thecfduser Senior Member karine Join Date: Nov 2009 Posts: 158 Rep Power: 16	Hello dear Colleagues, when dealing with VOF in Fluent, we see that FLUENTS calculate residuals for continuity and momentum equations....but not for the volume fraction equation...Can anyone tell me why??? This last equation is also resolved no??? Thanks for help Regards

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December 8, 2009, 07:45		#2
Philipov Senior Member Svetlin Filipov Join Date: Mar 2009 Location: United Kingdom Posts: 176 Rep Power: 17	As you know continuity and volume fraction are in close relation. the residuals on continuity are the same for the volume fraction (I think so... there is a logic...)

December 8, 2009, 14:24		#3
thecfduser Senior Member karine Join Date: Nov 2009 Posts: 158 Rep Power: 16	No....the proof, take a look to residuals in an eulerian model (Fluent's eulerian). U will see that the volume fraction residuals are monitored too

December 9, 2009, 03:43		#4
Goldsstean Member Amol Ramteke Join Date: May 2009 Location: Kolkata Posts: 30 Rep Power: 16	The tracking interface is accomplished by the solution of continuity for the VOF. tat y showing only continuity equation with momentum.

December 10, 2009, 13:35		#5
thecfduser Senior Member karine Join Date: Nov 2009 Posts: 158 Rep Power: 16	Thank u If u understood good, u are saying that VOF solves NS and the continuity equation only? 4 equations and not 5? Regards