[Sedullo]

I need to study the heat transfer on a wall by natural convection, I am simulating a problem where the central part of the right side wall is heated, the left side wall is set to slip condition. I am using buoyantBoussinesqPimpleFoam

As you can see in the picture, a kind of vortex is created, instead, I expected that the flux should have gone upward entering from below, I attach here the bc I set, I hope you can find a way to fix the problem, because I have been struggling for some days on it and I cannot go ahead.

FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    object      p_rgh;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 2 -2 0 0 0 0];

internalField   uniform 0;

boundaryField
{
    sideWallheated
    {
        type            fixedFluxPressure;      
    }

    rightsideWallsNotheated
    {
        type            fixedFluxPressure;
    }

    leftsideWallsNotheated
    {
        type            fixedFluxPressure;
    }


   inlet
    {
       type            totalPressure;
        p0              uniform 0;     
    }

    outlet
    {
        type            totalPressure;
        p0              uniform 0;        
    }

FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    object      T;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 0 0 1 0 0 0];

internalField   uniform 300;

boundaryField
{
    sideWallheated
    {
        type            fixedValue;
        value           uniform 340;
    }

    rightsideWallsNotheated
    {
        type            zeroGradient;
    }

    
    leftsideWallsNotheated
    {
        type            zeroGradient;
    }

      inlet
    {
        type            inletOutlet;
        inletValue      uniform 300;
        value           uniform 300;
    }

    outlet
    { 
        type            inletOutlet;
        inletValue      uniform 300;
        value           uniform 300;
    }

    #includeEtc "caseDicts/setConstraintTypes"
}

FoamFile
{
    version     2.0;
    format      ascii;
    class       volVectorField;
    object      U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

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

internalField   uniform (0 0 0);

boundaryField
{
    sideWallheated
    {
        type            noSlip;
    }


 rightsideWallsNotheated
    {
        type            noSlip;
    }


    leftsideWallsNotheated
    {
        type            slip;
    }

    inlet
    {
        type            outletInlet;
        outletValue     uniform (0 0 0);
        value           uniform (0 0 0);
    }

    outlet
    {
        type            zeroGradient;
    }



    #includeEtc "caseDicts/setConstraintTypes"
}