14 January 2020
- Last edited 14 January 2020
After setting up a new case I do not get the error prompt as described above any longer. However, I'm experiencing a different issue. When I start the simulation, the energy residual just explodes and goes straight up to 1e+35 after just 15 iterations. I'm also getting warnings from iteration 1, that temperature was limited to 5000 K in 12000 cells etc. even though I have external CFD of an urban setting with solar ray tracing. I should not get temperatures above 300 K, as my inlet temperature is 278 K. I set the solar parameters to 425 W/m2 direct, and 95 W/m2 diffuse (measured values).
The thing is, I'm not sure how to set the boundary conditions for my domain boundaries correctly. I set the external radiation temperature (I assume this to be Tsky in my case) to 273 K and that the domain boundaries do not take part in the solar ray tracing (so that radiation would pass right through them without any interaction). Or longwave radiation losses to the sky be modelled differently?