[unbps]

Hello everybody,
I am doing a simple model with the boundary externalWallHeatFluxTemperature to understand how it is working. I am using it as in the example from openFOAM tutorials:
myPatch { type externalWallHeatFluxTemperature; kappa fluidThermo; Ta uniform 300.0; h uniform 10.0; thicknessLayers (0.1 0.2 0.3 0.4); kappaLayers (1 2 3 4) value uniform 300.0; kappaName none; }

My model is just a plate connected to the ambient through the externalWallHeatFluxTemperature boundary and a heat source.
I tried two cases:
· In case 1: Initial temperature is 105ºC and the ambient temperature is 105. Heat source 25W. However, it seems that the temperature in the cold plate does not increase.
· In case 2: Initial temperature is 105ºC and the ambient temperature is 0ªC. Heat source 25W. However, the temperature does not decrease.
It looks to me that the ambient temperature is not working. Can somebody help me to understand how this boundary works?
Thanks in advance,