Wrong Temperatur Multiflow
 

I noticed something very strange.

In fluent I have a solid and fluid domain. On the outer wall, I specify a heat flux. The fluid is defined as air. The temperature curve of the wall corresponds to that of the measurement.

If I now use the Eulerian model (air & steam) with the default settings, the increase in wall temperature is underestimated by 50 %, even though the fluid domain is initialised to 100 % with air and there is only one outlet (no inlet) without any backflow. Hence over the whole calculation time is no steam present.


I tried it laminar as well turbulent. Always same outcome


Does anyone have any ideas? I am using the 2020R2 version.


Update: I does work with the VOF model