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-   -   InteFoam Tolerances (http://www.cfd-online.com/Forums/openfoam-solving/59692-intefoam-tolerances.html)

marcelo May 10, 2007 04:22

Hi, I use interFoam to simu
 
Hi,

I use interFoam to simulate bubbles in glycerine, I obtained bad results, and I don't know what is the numerical problem. With water there aren't problems.

I use this

solvers
{
pcorr ICCG 1e-10 0;
pd ICCG 1e-10 0;
gamma BICCG 1e-12 0;
U BICCG 1e-08 0;
}

PISO
{
momentumPredictor yes;
nCorrectors 3;
nNonOrthogonalCorrectors 0;
nGammaCorr 1;
nGammaSubCycles 4;
cGamma 2;

Image1

Image2

Image3

http://www.cfd-online.com/OpenFOAM_D...your_image.gif

Regards

joakim May 10, 2007 04:30

Is it only the density and vis
 
Is it only the density and viscosity that differs between water and glycerine?

Did u try changing one thing at a time to find out what made the changes?

Regards

/Joakim

marcelo May 10, 2007 14:16

only the viscosity is the impo
 
only the viscosity is the important change; for water is 0.001 and for glycerine is 1.045, (density: water 1000, glycerine 1257; and surface tension: water 0.07, glycerine 0.063)

Regards

joakim May 12, 2007 20:02

OK, sorry I do not have any id
 
OK, sorry I do not have any idea for the moment.

I have a question though. Did you initialize with a spherical bubble. If so how did you accomplish the initialization?

Regards

/Joakim

marcelo May 15, 2007 20:52

the initial condition is this
 
the initial condition is this


http://www.cfd-online.com/OpenFOAM_D...ges/1/4490.jpg


no the first buble


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