[DashaSh]

Hello,

I'm setting up a multi-region heat exchange case and I have a question about the dimensions of turbulent thermal diffusion.
According to the documentation (see link 1 and link 2) :

alphat    | Kinematic turbulent thermal conductivity    [m2/s]

turbulent thermal diffusion is proportional to kinematic viscosity and should have units of [m2/s]

However, in the tutorials, I found that the units are given as kg/m/s:

FoamFile
{
    format      binary;
    class       volScalarField;
    location    "0/fluid";
    object      alphat;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

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

Can someone explain this discrepancy?

I'm also found a post with the same question, but without an answer.

Useful links:
https://cfd.direct/openfoam/free-sof...or-the-future/
https://en.wikipedia.org/wiki/Turbul...Eddy_viscosity