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SimpleFOAM and MRF

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Old   June 15, 2016, 03:39
Default SimpleFOAM and MRF
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carno
Join Date: Mar 2009
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Hi All,

I am simulating a axial fan in SimpleFOAM. The solution is converged but the results are totally strange. I have noticed two problems.

1. The flow is happening in opposite direction the fan is pushing
2. The pressure and velocity magnitudes are very high.

I have posted some pictures to give you an idea.

The mechCheck is ok. I am using total pressure inlet and static pressure outet. The domain is simple, a cylinder with fan inside it.

I suspect is fvSchemes issue.

BTW, how to submit <code> in the forum?

Code:

FoamFile
{
version 2.0;
class dictionary;
format ascii;
location "system";
object fvSchemes;
}
ddtSchemes
{
default steadyState;
}
gradSchemes
{
default Gauss linear;
}
divSchemes
{
default bounded Gauss upwind;
div(phi,U) bounded Gauss upwind;
div(phi,omega) bounded Gauss upwind;
div(phi,k) bounded Gauss upwind;
div(R) Gauss linear;
div((nuEff*dev(T(grad(U))))) Gauss linear;
}
laplacianSchemes
{
default Gauss linear corrected;
}
interpolationSchemes
{
default linear;
}
snGradSchemes
{
default corrected;
}
fluxRequired
{
default no;
p ;
}
Attached Images
File Type: jpg Pressure.jpg (40.7 KB, 52 views)
File Type: jpg Pressure_rotor.jpg (61.5 KB, 54 views)
File Type: jpg Vmag.jpg (57.5 KB, 61 views)
File Type: jpg Vel_rotor.jpg (53.0 KB, 47 views)
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mrf, simplefoam convergence


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