Learning Forum

[chris.gerhardt_98]

Hello,
I am trying to simulate a room under extrem conditions. I want to use a HVAC system to heat a cabin of a ship in the arctic regions. The room has steel walls with isolation to keep the room warm. For that I created 3 geometries in Spaceclaim. The fluid inside the room (air) and two layers of walls (steel and isolation). I created an outlet and an inlet for the air.

In the set-up I used an mass-flow inlet and an pressure outlet. I turned on energy in a pressure based calculation. The Steel information is from the fluent database, for the isolation I changed the density and created a new material. The Steel received a Temperature of 225K (-48°C) and the air from the inlet is suppose to be 303K (30°C). I used diffrent mass-flow rates for the inlet but in post-cfd the result always shows a heat anomalie. The steel heats up to 2800K and I cant figure out why. It would be great if you could give me some advice how to fix this.
Thanks in advance for the help!

[Essence]

Hello,

Please check the mesh (orthogonal quality, growth rate, y+). How did you initialize the case? Please use realistic initial guess for the initialization.

[chris.gerhardt_98]

Thanks for the quick response.
For the mesh I used the tetrahedron method. I also added prism layers.
The growth rate is 1.2 , the orthogonal quality is bad so I will try to fix that.
How do I check the y+?
I initialized the calculation with the hybrid initialization