CFD Online Discussion Forums - What are the right BCs for a multi-solid-region problem?

Hi all,
I am trying to model a problem consisting of a solid (sub-divided into two regions) and a fluid.
The two solid regions produce heat at different rates, and they have the same material properties.

I dug into this forum for quite a while and found two posts:
https://www.cfd-online.com/Forums/openfoam-pre-processing/211078-solid-solid-thermal-resistance-layer-thickness.html
https://www.cfd-online.com/Forums/openfoam-solving/151469-boundary-condition-conjugate-thermal-heat-conduction.html

They seem to agree on the fact that solid-to-solid interfaces should be modeled using compressible::turbulentTemperatureCoupledBaffleMix ed.
However, my result doesn't look good at the interface (see attached figure).

I have attached all the files.
Any ideas of what is going on/suggestions are welcome!
Thank you,

Here is a snippet of the solid "heater0" changeDictionaryDict:

Code:

        heater0_to_heater1

        {

            type            compressible::turbulentTemperatureCoupledBaffleMixed;

            Tnbr            T;

            kappaMethod     solidThermo;

            value           uniform 298;

        }

Here is a snippet of the solid "heater1" changeDictionaryDict:

Code:

        heater1_to_heater0

        {

            type            compressible::turbulentTemperatureCoupledBaffleMixed;

            Tnbr            T;

            kappaMethod     solidThermo;

            value           uniform 298;

        }

And here is a snippet of the topoSetDict:

Code:

    // Heater 0

    {

        name    heater0CellSet;

        type    cellSet;

        action  new;

        source  boxToCell;

        box     (-0.004 -0.05 -0.1) (0.004 -0.025 0.1);

    }

    {

        name    heater0;

        type    cellZoneSet;

        action  new;

        source  setToCellZone;

        set     heater0CellSet;

    }

    // Heater 1

    {

        name    heater1CellSet;

        type    cellSet;

        action  new;

        source  boxToCell;

        box     (-0.004 -0.025 -0.1) (0.004 0.0 0.1);

    }

    {

        name    heater1;

        type    cellZoneSet;

        action  new;

        source  setToCellZone;

        set     heater1CellSet;

    }

Attachments:
Attachment 86025
Attachment 86027