[nimasam]

hi friends
whats the best boundary condition for Temperature at the outlet of a channel. flow is fully developed from hydrodynamic view!

give me hint please

[sixwp]

Hi Nima,
using this condition would be okay:

outlet
    {
        type            inletOutlet;
        inletValue      $internalField;
        value           $internalField;
    }

For further questions, look carefully in the forum/wiki/tutorials where those matters were already discussed/defined/used