| Milad Mohassel |
November 23, 2016 13:12 |
Open channel Boundary Conditions
Hi dear Foamers
I am trying to run an 2 phase flow in Version 2.4 since methods are changed from 2.3 for interFoam.
and I have problems with that.
1. my first problem is should I Split both outlet and inlet in to 2 face,(water and air separately)?
I caught the free surface (alpha.water) correctly but for Velocity I just Need the water velocity but air have non zero velocity too.
there is my U and alpha.water
any ideas?
thanks
the first 2 codes have 2 inlets
Code:
-*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.4.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object alpha.water;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 0 0 0 0 0 0];
internalField uniform 0;
boundaryField
{
inlet-air
{
type fixedValue;
value uniform 0;
}
inlet-water
{
type fixedValue;
value uniform 1;
}
outlet
{
type zeroGradient;
}
atmosphere
{
type inletOutlet;
inletValue uniform 0;
value uniform 0;
}
walls
{
type zeroGradient;
}
rib
{
type zeroGradient;
}
front
{
type empty;
};
back
{
type empty;
};
};
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.4.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volVectorField;
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //dimensions [0 1 -1 0 0 0 0];
internalField uniform (0.1 0 0);
boundaryField
{
inlet-air
{
type fixedValue;
value uniform (0 0 0);
}
inlet-water
{
type fixedValue;
value uniform (0.1 0 0);
}
outlet
{
//type zeroGradient;
type pressureInletOutletVelocity;
value uniform (0 0 0);
}
atmosphere
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}
walls
{
type fixedValue;
value uniform (0 0 0);
}
rib
{
type fixedValue;
value uniform (0 0 0);
}
front
{
type empty;
};
back
{
type empty;
};
}
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.4.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object alpha.water;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 0 0 0 0 0 0];
internalField uniform 0;
boundaryField
{
inlet//has changed from inlet-water & inlet-air to inlet
{
type variableHeightFlowRate;
lowerBound 0.0;
upperBound 0.5;
value uniform 1;
}
outlet
{
//type inletOutlet;
//inletValue uniform 0;
type zeroGradient;
}
atmosphere
{
type inletOutlet;
inletValue uniform 0;//Like Spillway tut
value uniform 0;
}
walls
{
type zeroGradient;
}
rib
{
type zeroGradient;
}
front
{
type empty;
};
back
{
type empty;
};
};
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.4.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volVectorField;
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 1 -1 0 0 0 0];
internalField uniform (0.1 0 0);
boundaryField
{
inlet
{
type fixedValue;
value uniform (0.1 0 0);
}
outlet
{
type zeroGradient;
}
atmosphere
{
type pressureInletOutletVelocity;
phi phi;
value uniform (0 0 0);
}
walls
{
type fixedValue;
value uniform (0 0 0);
}
rib
{
type fixedValue;
value uniform (0 0 0);
}
front
{
type empty;
};
back
{
type empty;
};
};
// ************************************************************************* //
at the end I use 0.9 for upper bound but I get nothing!
type variableHeightFlowRate;
lowerBound 0.0;
upperBound 0.9;
value uniform 1; |
