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Old   April 30, 2015, 12:39
Default Transonic, Compressible, full flight scale Boundary Conditions?
  #1
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Jimmy
Join Date: Apr 2015
Posts: 20
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OK, I know I've been reaching out a lot, but everyone has been very helpful, and I'm learning a lot quickly. I think I'm finally stuck on settign up boudnary conditions.

The case is rhoCentralFoam, ~0.82 Mach, in the neighborhood of 30000'. See below for blockMeshDict, U, p, and T files:

blockMeshDict
Code:
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 39.3700787; //0.0254; //(meters to inches)

vertices
/*(
    (-2.54 -15.24 -2.54)    //    (-100 -600 -100)        // full grid
    (30.48 -15.24 -2.54)    //    (1200 -600 -100)
    (30.48 15.24 -2.54)        //    (1200 600 -100)
    (-2.54 15.24 -2.54)        //    (-100 600 -100)
    (-2.54 -15.24 10.16)    //    (-100 -600 400)
    (30.48 -15.24 10.16)    //    (1200 -600 400)
    (30.48 15.24 10.16)        //    (1200 600 400)
    (-2.54 15.24 10.16)        //    (-100 600 400)
);*/
(
    (-2.54 0 -2.54)            //    (-100 -600 -100)        // half grid
    (30.48 0 -2.54)            //    (1200 -600 -100)
    (30.48 15.24 -2.54)        //    (1200 600 -100)
    (-2.54 15.24 -2.54)        //    (-100 600 -100)
    (-2.54 0 10.16)            //    (-100 -600 400)
    (30.48 0 10.16)            //    (1200 -600 400)
    (30.48 15.24 10.16)        //    (1200 600 400)
    (-2.54 15.24 10.16)        //    (-100 600 400)
);



blocks
(
//    hex (0 1 2 3 4 5 6 7) (100 100 100) simpleGrading (1 1 1)
    hex (0 3 7 4 1 2 6 5) (50 25 25) simpleGrading (1 1 1) // sets the block in order from X_min -> X_max
);

edges
(
);

boundary
(   
    inlet
    {
        type patch;
        faces
        (
            (0 4 7 3)
        );
    }
    outlet
    {
        type patch;
        faces
        (
            (1 2 6 5)
        );
    }
    bottom
    {
        type symmetryPlane;
        faces
        (
            (0 1 5 4)
        );
    }
    top
    {
        type patch;
        faces
        (
            (2 3 7 6)
        );
    }
    front
    {
        type patch;
        faces
        (
            (0 3 2 1)
        );
    }
    back
    {
        type patch;
        faces
        (
            (4 5 6 7)
        );
    }
);


mergePatchPairs
(
);

// ************************************************************************* //
p-file
Code:
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [1 -1 -2 0 0 0 0];        //compressible
//dimensions        [0 2 -2 0 0 0 0];    //incompressible

internalField   uniform 32932;

boundaryField
{
    inlet
    {
        type            fixedValue;
        value           uniform 32932;
    }
    outlet
    {
        type            zeroGradient;
        value           uniform 32932;
    }

    bottom
    {
        type            symmetryPlane;
        //type            zeroGradient;        //fixedValue;
        //value           uniform 32932;
    }
    top
    {
        //type            symmetryPlane;
        type            zeroGradient;        //fixedValue;
        value           uniform 32932;
    }
    front
    {
        //type            symmetryPlane;
        type            zeroGradient;        //fixedValue;
        value           uniform 32932;
    }
    back
    {
        //type            symmetryPlane;
        type            zeroGradient;        //fixedValue;
        value           uniform 32932;
    }
    fuselage
    {
        type            zeroGradient;
        value           uniform 32932;
    }
    wings
    {
        type            zeroGradient;
        value           uniform 32932;
    }
    vertTail
    {
        type            zeroGradient;
        value           uniform 32932;
    }
    horizStab
    {
        type            zeroGradient;
        value           uniform 32932;
    }
    engines    
    {
        type            zeroGradient;
        value           uniform 32932;
    }
    pylon
    {
        type            zeroGradient;
        value           uniform 32932;
    }
    pylonExtension
    {
        type            zeroGradient;
        value           uniform 32932;
    }
    pod
    {
        type            zeroGradient;
        value           uniform 32932;
    }

}

// ************************************************************************* //
U-file
Code:
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (251 0 0);

boundaryField
{
    inlet
    {
        type            fixedValue;
        value            uniform (251 0 0);
    }
    outlet
    {
        type            zeroGradient;        //freestream;            //inletOutlet;
        //inletValue        uniform (251 0 0);    //
        //freestreamValue    uniform (251 0 0);
        value                uniform (251 0 0);
    }

    bottom
    {
        //type            zeroGradient;
        type            symmetryPlane;        //fixedValue;
        //value           uniform ( 0 0 0 );    //(0 0 0);
    }
    top
    {
        type            zeroGradient;
        //type            symmetryPlane;        //fixedValue;
        value           uniform ( 0 0 0 );
    }
    front
    {
        type            zeroGradient;
        //type            symmetryPlane;        //fixedValue;
        value           uniform ( 0 0 0 );    //(251 0 0)
    }
    back
    {
        type            zeroGradient;
        //type            symmetryPlane;        //fixedValue;
        value           uniform ( 0 0 0 );
    }
    fuselage
    {
        type            slip;
    }
    wings
    {
        type            slip;
    }
    vertTail
    {
        type            slip;
    }
    horizStab
    {
        type            slip;
    }
    engines    
    {
        type            slip;
    }
    pylon
    {
        type            slip;
    }
    pylonExtension
    {
        type            slip;
    }
    pod
    {
        type            slip;
    }

}

// ************************************************************************* //
T-file
Code:
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 0 0 1 0 0 0];

internalField   uniform 233;

boundaryField
{
 
    inlet
    {
        type            fixedValue;
        value           uniform 233;
    }
    outlet
    {
        type            zeroGradient;        //inletOutlet;
        value           uniform 233;
        //inletValue        uniform 233;
    }

    bottom
    {
        type            symmetryPlane;        //fixedValue;
        //value           uniform 233;
    }
    top
    {
        type            fixedValue;            //symmetryPlane;        //fixedValue;
        value           uniform 233;
    }
    front
    {
        type            fixedValue;            //symmetryPlane;        //fixedValue;
        value           uniform 233;
    }
    back
    {
        type            fixedValue;            //symmetryPlane;        //fixedValue;
        value           uniform 233;
    }
    fuselage
    {
        type            zeroGradient;
        value           uniform 233;
    }
    wings
    {
        type            zeroGradient;
        value           uniform 233;
    }
    vertTail
    {
        type            zeroGradient;
        value           uniform 233;
    }
    horizStab
    {
        type            zeroGradient;
        value           uniform 233;
    }
    engines    
    {
        type            zeroGradient;
        value           uniform 233;
    }
    pylon
    {
        type            zeroGradient;
        value           uniform 233;
    }
    pylonExtension
    {
        type            zeroGradient;
        value           uniform 233;
    }
    pod
    {
        type            zeroGradient;
        value           uniform 233;
    }

}

// ************************************************************************* //
Based on the errors I get (very similar to this threat), I think most of the problem is in my boundary condition setup; however I am at wit's end...I am having trouble accounting for what looks to me to be differences in how the "patches" and so on are used for different type of solvers.

Any help or guidance would be appreciated, I've been pulling my hair out since last week, and really need it to run roday

Thanks!

Last edited by MtnRunBeachBum; May 1, 2015 at 10:13. Reason: Update post title
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Old   April 30, 2015, 16:33
Default
  #2
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Jimmy
Join Date: Apr 2015
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...And because I failed to include the actual error message in the above (original) post:

Code:
#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::sigFpe::sigHandler(int) at ??:?
#2  which: no linux-gate.so.1 in (/home/cfd/OpenFOAM/ThirdParty-2.3.1/platforms/linuxGcc/gperftools-svn/bin:/home/cfd/OpenFOAM/ThirdParty-2.3.1/platforms/linuxGcc/ParaView-4.1.0/bin:/home/cfd/OpenFOAM/cfd-2.3.1/platforms/linuxGccDPOpt/bin:/home/cfd/OpenFOAM/site/2.3.1/platforms/linuxGccDPOpt/bin:/home/cfd/OpenFOAM/OpenFOAM-2.3.1/platforms/linuxGccDPOpt/bin:/home/cfd/OpenFOAM/OpenFOAM-2.3.1/bin:/home/cfd/OpenFOAM/OpenFOAM-2.3.1/wmake:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl)
__kernel_sigreturn
#3  Foam::sqrt(Foam::Field<double>&, Foam::UList<double> const&) at ??:?
#4  Foam::tmp<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> > Foam::sqrt<Foam::fvPatchField, Foam::volMesh>(Foam::tmp<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> > const&) at ??:?
#5  
 at ??:?
#6  __libc_start_main in "/usr/lib/libc.so.6"
#7  
 at ??:?
[cfd@cfd G3_pod_rhoCentralFoam_b]$
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