CFD Online Discussion Forums - OpenFOAM 1.7 cylindricalInletVelocity and swirlFlowRateInletVelocity BC's

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OpenFOAM 1.7 cylindricalInletVelocity and swirlFlowRateInletVelocity BC's

I am very new to this software and recently installed OF1.7 beside OF1.6 to use the new boundary conditions.

I am trying to use the new swirl/cylindrical boundary conditions in OF 1.7, but I get the error below even though I follow the format specified in the header files for these bc's. The file should not need a 'value' line according to the header. Also, I have checked that my shell is searching OF1.7 directories for files by running a solver (fireFoam) that does not exist in my non-updated version of OF1.6. Finally, I am trying to do this on a nonplanar mesh that was produced by snappyHexMesh.

Thanks in advance for any help.

Adam

Reading field U

--> FOAM FATAL IO ERROR:
Essential entry 'value' missing

file: /home/alc79/OpenFOAM/OpenFOAM-1.7.0/tutorials/mesh/combustor_jetson_swirl_coldflow_refined/2e-07/U::boundaryField::comb_injector_inlet from line 79 to line 84.

From function fvPatchField<Type>::fvPatchField(const fvPatch& p,const DimensionedField<Type, volMesh>& iF,const dictionary& dict,const bool valueRequired)
in file /home/alc79/OpenFOAM/OpenFOAM-1.7.0/src/finiteVolume/lnInclude/fvPatchField.C at line 120.

FOAM exiting

Yes, I was just looking at that, and also changed it to accept a velocity instead of a flowrate. Just include value, it needs that to place the calculated velocities in. It shouldn't matter what you put there.

Code:

    inlet

    {

        type            swirlFlowRateInletVelocity;

        flowRate     0.2;        // Volumetric/mass flow rate [m3/s or kg/s]

        rpm             100;

        value          uniform (0 0 0);

    }

Thanks a lot. The same value line seems to be needed for the cylindricalInletVelocity BC as well.

Many Thanks.

Adam

Hi Adam (or someone else),
can you please post your BC with the cylindricalInletVelocity.

With best regards

For a patch named AIR_INLET

AIR_INLET
{
type cylindricalInletVelocity;
axis (0 1 0);
centre (0 0.114 0);
axialVelocity 2.202582536;
rpm 444.4074;
radialVelocity 0;
value uniform (0 0 0);
}

Looks like my first trial. :)
Thank you for the fast reply. Now it's running.

Hi,

With swirlFlowRateInletVelocity, I don't know how to determine if "flowRate" is mass or volume flow rate.

According to the code, it depends on units of "phi"

Code:

if (phi.dimensions() == dimVelocity*dimArea)

    {

        // volumetric flow-rate

        operator==(tangentialVelocity + n*avgU);

    }

    else if (phi.dimensions() == dimDensity*dimVelocity*dimArea)

    {

        const fvPatchField<scalar>& rhop =

            patch().lookupPatchField<volScalarField, scalar>(rhoName_);



        // mass flow-rate

        operator==(tangentialVelocity + n*avgU/rhop);

    }

But what is phi??

Thanks,
Pierre