[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.

[MuxaB]

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.

[great1427]

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.

[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

[great1427]

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

[great1427]

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

[MuxaB]

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.