Learning Forum

[dhirajlote]

Hello Sir,

I am using CFX 19.2 with MUSIG model (7 size groups). I have run the simulation and got the converged solution. Sir, I would like to ask how to plot the bubble size distribution as a function of bubble diameter? 

[Amine Ben Hadj Ali]

XY Chart might be useful here: Size fraction or Number density vs diameter / size of the bin or you can do it in third party program.

[dhirajlote]

Thank you for the reply.

"Number density/diameter/size of the bin" none of these options are available in the CFX.

Regarding MUSIG model the only available options are "Polydispersed Fluid 1.Group 1.Size Fraction"

I dont know how to get options like, bubble diameter, number density etc.

[Amine Ben Hadj Ali]

But you know the size of the bin as you have set up the case right?. All other quantities might be derived.

[Richard_Marx]

Hi Amine, 

For the polydispersed phase, what exactly does "size fraction mean" ? Is that just the fraction of our polydispersed phase divided by total polydispersed phase in that area? So for the polydispersed phases our size fractions should add to 1? Similar to a volume fraction? 

I think I am after the same thing as the student above, and would like to understand my polydispersed phase's diameters and locations. You're saying the best way to do this is I will need to create an expression to calculate my mean particle diameter?

I found these slides (apparently from Ansys) http://ptsanmiguelense.com/wsMescal/server/manualesSSC/CFX160_Multiphase_Workshop_08_MUSIG_and_Non_Drag_Forces.pdf

that seem to use mean particle diameter for the polydispersed air? Did they create this variable or is there now a way for Ansys to generate that number?

Thanks! 

 

[Amine Ben Hadj Ali]

volune fraction of bin/volume fraction of phase.

[Amine Ben Hadj Ali]

mean particle diameter is available you fo not need to create anything