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Flow Past a cylinder- Re-1000-PisoFoam Solver

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Default Flow Past a cylinder- Re-1000-PisoFoam Solver
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vito
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Hello All,

I know this is awell discussed topic with a lot of posts in the forum. I believe I have done due diligence about going through the posts. I am also new to OpenFoam. So please bear with any incompetence if any.
I am trying to simulate the 3D flow past cylinder at re=1000 using scalable and no wall functions but with little success. I am using RANS modelling K-epsilon and SST k-Omega.
My drag values are around 0.84 but I dont capture any vortex shedding and my cl values are very low. I know that for that no wall fucntion my Y+ should be less than 6 and I have checked that using YplusRAS utility in openfoam. FOr scalable wall functions my Y plus is around ~ 12. I am using gmsh to create my mesh. Please find below all the value that I have used for scalable wall function.

k is calculated as 1.5(Velocity*Intensity)^2
Intensity=0.16*RE)^-1/8 ( http://www.cfd-online.com/Wiki/Turbu...ary_conditions)
Epsilon - as calculated in the above refernce and has a valueof 5.17E-07
Omega =1.347 and
Omega near wall 200

I am attaching my geo file as mesh.txt
p at 0 seconds

boundaryField
{
top
{
type zeroGradient;
}
bottom
{
type zeroGradient;

}
inlet
{
type zeroGradient;
}
outlet
{
type fixedValue;
value uniform 0;
}
frontAndBack
{
type zeroGradient;
}
cylinder
{
type zeroGradient;
}
}
U=0
boundaryField
{
top
{
type slip;
}
bottom
{
type slip;

}
inlet
{
type freestream;
freestreamValue uniform (0.025 0 0);
}
outlet
{
type inletOutlet;
inletValue uniform (0 0 0);
value uniform (0 0 0);
}
frontAndBack
{
type slip;
}
cylinder
{
type fixedValue;
value uniform (0 0 0);
}
}

k=
boundaryField
{
top
{
type kqRWallFunction;
value uniform 0;

}
bottom
{
type kqRWallFunction;
value uniform 0;

}
inlet
{
type fixedValue;
value uniform 4.286E-06;
}
outlet
{
type zeroGradient;

}
frontAndBack
{
type kqRWallFunction;
value uniform 0;
}

cylinder
{
type kqRWallFunction;
value uniform 0;
}
}

Epsilon
boundaryField
{
top
{
type epsilonWallFunction;
value uniform 5.174E-07;

}
bottom
{
type epsilonWallFunction;
value uniform 5.174E-07;
}
inlet
{
type fixedValue;
value uniform 5.174E-07;
}
outlet
{
type zeroGradient;

}
frontAndBack
{
type epsilonWallFunction;
value uniform 5.174E-07;
}

cylinder
{
type epsilonWallFunction;
value uniform 5.174E-07;
}
}

Will appreciate nay suggestions
Attached Files
File Type: txt mesh.txt (5.3 KB, 0 views)
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