CFD Online Discussion Forums - Coupled heat transfer convective-diffusive

Hello everyone,
I'm writting this post because I need to simulate a flow heated by an obstacle in the center of the flow in 2D axis-symetric. I already used BuoyantBoussinesqSimpleFoam to simulate the mixing between a hot flow with a cold one, so I decided to keep using this solver. However, results show that the only heat transfer taken into account is the diffusive heat transfer, as you can see on pictures attached. The heat is not transported by the flow.

I used fixedGradient BC but I also tried with fixedValue and the conclusion remains the same.

Code:

/*--------------------------------*- C++ -*----------------------------------*\

| =========                 |                                                 |

| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |

|  \\    /   O peration     | Version:  v2012                                 |

|   \\  /    A nd           | Website:  www.openfoam.com                      |

|    \\/     M anipulation  |                                                 |

\*---------------------------------------------------------------------------*/

FoamFile

{

    version     2.0;

    format      ascii;

    class       volScalarField;

    location    "0";

    object      T;

}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //



dimensions      [0 0 0 1 0 0 0];





internalField   uniform 673;



boundaryField

{        

    inlet

    {

        type            fixedValue;

        value           uniform 673;

    }

        

    outlet

    {

        type            zeroGradient;

    }

        

    wall

    {

        type            zeroGradient;

    }





        obstacle

        {

        type            fixedGradient;

                gradient                uniform 500;

                

    }



    wedge0

    {

        type            wedge;

    }

        

    wedge1

    {

        type            wedge;

    }        



}









// ************************************************************************* //

I can provide other files of course but I wonder if the problem is not about the solver itself.
So my questions are : - Can we use BuoyantBoussinesqSimpelFoam to solve this type of problem ?
- Is there some options available to enable convection heat transfer in buoyant(Boussinesq)SimpleFoam ?
- Do I have to use chtMultiRegionFoam and model the heater/obstacle as a solid ?

Regards,
Léo.