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-   -   How to see bubbles on flow3D Display (http://www.cfd-online.com/Forums/flow-3d/85331-how-see-bubbles-flow3d-display.html)

gregot February 23, 2011 08:54

How to see bubbles on flow3D Display
 
Hi

I'm trying to simulate a simple flow with some bubbles in it. I activate drift flux model, density evaluation, adiabatic bubbles, RNG turbulence model.

The problem is that I can't see a right density evolution during the simulation and that I don't know which parameter to choose to see where are the bubbles.

:o

MuxaB March 12, 2011 18:55

Quote:

Originally Posted by gregot (Post 296551)
Hi

I'm trying to simulate a simple flow with some bubbles in it. I activate drift flux model, density evaluation, adiabatic bubbles, RNG turbulence model.

The problem is that I can't see a right density evolution during the simulation and that I don't know which parameter to choose to see where are the bubbles.

:o

Since you are using the drift-flux model, I assume the bubbles are small compared to the mesh size and numerous, right? In that case they are modeled as a continuous phase, described by a concentration in the mixture rather than directly as bubbles. In the one-fluid drift-flux model, it is the mixture density that is the variable of interest. If you are using the two-fluid approach, then it is the fluid fraction.

The adiabatic bubble model does not play any role in that model.


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