[pupo]

Good Afternoon!

I'm Trying to simulate the combined convection+radiation cooling of a rod with natural convection using BuoyantSimpleFoam. The convective part works just fine but the P1 model has no effect on the heated wall temperature at all.

At the heated wall I imposed a fixed temperature gradient, For the problem at hand I'm interested in a non participating media ( i set the absorptivity and the emissivity of the medium to 0) but if i do set them to say 0.5, i can see that the flow gets warmer. However the wall temperature remains the same.

Is there anyway around this? Heat dissipation by radiation should be responsible by around 50% of the total heat dissipation

Best Regards

[pupo]

I've fixed the problem

when using a boundary condition of the type "externalWallHeatFluxTemperature;" make sure to name the Qr field.

    
Innerwall     
{
        type            externalWallHeatFluxTemperature;
        kappa           fluidThermo;
        q               uniform 264;
        value           uniform 300.0;
        kappaName       none;
        Qr              Qr; // <--- this is really important!
}

For boundary conditions of the type "FixedGradient", i don't have a solution, but for what it matters i do.

Hope this helps someone in the Future.

Best Regards