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-   -   Alphat for laminar incompressible flow (https://www.cfd-online.com/Forums/openfoam-solving/228392-alphat-laminar-incompressible-flow.html)

Sedullo June 30, 2020 06:13

Alphat for laminar incompressible flow
 
I am running a case to simulate the natural convection boundary layer flow from a vertical plate using buoyantBoussinesqPimpleFoam.
Now the BC for alphat are set like this:

Code:

/*--------------------------------*- C++ -*----------------------------------*\
  =========                |
  \\      /  F ield        | OpenFOAM: The Open Source CFD Toolbox
  \\    /  O peration    | Website:  https://openfoam.org
    \\  /    A nd          | Version:  6
    \\/    M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version    2.0;
    format      ascii;
    class      volScalarField;
    location    "0";
    object      alphat;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 2 -1 0 0 0 0];

internalField  uniform 0;

boundaryField
{

    inlet
    {
        type calculated;
        value uniform 0;
    }

    outlet
    {
        type calculated;
        value uniform 0;
    }


    atmosphere
    {
        type calculated;
        value uniform 0;
    }

    hotWall
    {
        type            alphatJayatillekeWallFunction;
        Prt            0.85;
        value          $internalField;
    }



    #includeEtc "caseDicts/setConstraintTypes"
}

But it does not give any result that make sense, I cannot observe the boundary layer flow and I am quite sure that the problem is in this setting.
How would you set this?


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