how to add a new equation for solving rhoT?
 

Hello,

I want to solve this simple equation for a simple test case :

rho.u.T=0

where the velocity is explicitly introduced ( simply the velocity is a vector (1,0,0) all over the domain.
How can I introduce this velocity to the solver, and what solver to use ? ( I used IcoFoam but i dont know how to deal with the velocity.)

I think you should check "scalarTransportFoam".

Refer the link for more detailed information:
http://openfoamwiki.net/index.php/ScalarTransportFoam

Best Luck!