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 August 31, 2010, 21:54 about density #1 New Member   JunWei Wang Join Date: Jan 2010 Posts: 13 Rep Power: 7 if Model setup -> Fluids -> Density is 100, what does the text output that the macoscopic density in the free surface (air) and model . Does it output 100? Thanks everyone.

September 1, 2010, 22:57
#2
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michael barkhudarov
Join Date: Mar 2009
Posts: 331
Rep Power: 9
Quote:
 Originally Posted by great1427 if Model setup -> Fluids -> Density is 100, what does the text output that the macoscopic density in the free surface (air) and model . Does it output 100? Thanks everyone.
That's correct.

September 2, 2010, 04:33
#3
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JunWei Wang
Join Date: Jan 2010
Posts: 13
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Quote:
 Originally Posted by MuxaB That's correct.
why does the air not show the air's density?

why does the model not show the model's density?

Is it normal?

thanks.

 September 2, 2010, 21:53 #4 Senior Member   michael barkhudarov Join Date: Mar 2009 Posts: 331 Rep Power: 9 In the one-fluid (fluid and void) model the density is that of liquid only, even in partially filled cells. The density in the void is not important but set at liquid density too. If you were to use the two-fluid model, then each cell's density will be volume averaged over the cell volume

September 2, 2010, 22:14
#5
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JunWei Wang
Join Date: Jan 2010
Posts: 13
Rep Power: 7
Quote:
 Originally Posted by MuxaB In the one-fluid (fluid and void) model the density is that of liquid only, even in partially filled cells. The density in the void is not important but set at liquid density too. If you were to use the two-fluid model, then each cell's density will be volume averaged over the cell volume
thanks a lot

 September 3, 2010, 01:12 #6 New Member   JunWei Wang Join Date: Jan 2010 Posts: 13 Rep Power: 7 I have a problem. if the initial condition is the water in the model, and I put another density fluid, then in the Drift-flux model, the density of phase#1 and density of phase#2 what should I give? Is the density of phase#1 water, or the density of phase#2 ? thanks

 September 6, 2010, 00:27 #7 Senior Member   michael barkhudarov Join Date: Mar 2009 Posts: 331 Rep Power: 9 Phase 1 constitutes the continuous phase, i.e., water in your case, while phase 2 is the dispersed phase, e.g., air bubbles or solid particles.

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