[hojjat.m]

BTW is there anyway I can convert the surfaceVectorField into volVectorField?
Thanks

[arsalan.dryi]

Hi Foamers,

I'm doing a 3D simulation of two and three bubble rising using a modified interFoam solver and I need to bubbles centre position, velocity and surface area.

For a single bubble rising I used swak4Foam expressions for example for bubble centre position in Y as follows :

    bubbleCentreY
    {
        type swakExpression;
        valueType internalField;
        verbose true;
    variables (
    "Vol= sum (alpha1 < 0.5 ? vol() : 0);"
    "VolY= sum (alpha1 < 0.5 ? pos().y*vol() : 0);"    
    );        
    expression "VolY/Vol";
        accumulations (
        min        
        );

     
    }

Is there a way to compute two or three bubble properties in this manner?

Thanks in advance,
Best Regards,
Arsalan.

[Fahmida]

Originally Posted by gschaider

Right. That was there to "normalize out" the thickness of the 2D-mesh

About the discrepancy in size: no idea. Of course the isoSurface is naive about what you want to achive. So if in your simulation you have a bubble and a water surface then an iso-value of 0.5 will pick up the bubble AND the surface (that would explain the order-of-magnitude error). A bit creative playing around with the expressionField-functionObject might help here

Could you please explain a little more on how to separate the air above the water surface and bubble air while calculating?

[B_R_Khan]

Hello foamers!

I want to calculate surface area of rising bubble without using swake4foam. In paraview, I am using integrate variables to integrate alpha.water over whole domain but I need to incorporate the calculation of surface area in control dict. Is there any function object to do this? Please help me out.

Thanks