cylindrical T-junction 3 different material OpenFOAM
 

Hi all,

I am trying to model flow in T-junction(cylindrical) with conjugate heat-transfer having 3 regions, 1 solid and 2 missible liquid. Solid regions covers the entire surface of the junction.

I decided to use chtMultiRegionFoam.
I created mesh in gridgen. I specified material info in gridgen but openFrom dosent seem to read them, insted i would have to define solid and liquid region seperately so i could speciefy apporopriate thermophysical properties.
I general i know that it can be done in topoSetDict, but for this geometry i am unable to figure out how to do it
Please suggest something.