[danielbanos10]

Hi,
Currently I am trying to simulate a simple HVAC case, an inlet in a room, vith 6 K deltaT. I used Pimple and simple solvers, but the problem is the same.
I have two models, a 3D model and a 2D simplification.
The 3D case works well, the solution is logical, as you can see in the first image (slice of the symmetry plane of the room,U magnitude). But, when I use the 2D case it isn´t (second image). I thought that adding more iterations was the solution but still have the same problem after 200.000 iterations.
If anyone knows the solution, please tell me.
Best regards,
Daniel

[danielbanos10]

One of the solutions I found is using 3D with few cells in "y" direction and setting symmetryPlane BC.(pic attached).
Anyone had a similar problem ?

[Bloerb]

It looks to as if your solution is not converged yet. Lower your tolerance in fvSolution and remove the relaxation in the temperature field. (h/e). Or raise them to 0.9 or something similar.

[danielbanos10]

It looks to as if your solution is not converged yet. Lower your tolerance in fvSolution and remove the relaxation in the temperature field. (h/e). Or raise them to 0.9 or something similar.

Yes, that's was my first thought (reffering to the first post), so I changed the tolerance, did 200000 iterations, modified the relaxation of T to 0.8. And nothing changed... (in 2D case)