[doctor99268]

I am going through the user guide https://doc.cfd.direct/openfoam/user-guide-v10/cavity, an i am on the section on the lid driven cavity for having high reynolds number, i have followed the guide (i didnt change any settings since it was all preset, only thing i did was change the file name 0.orig to 0) and when i start the pisofoam, the courant number changes from 0.26something at 2.5secs to 1 at 2.505 secs where it stayed at 1 the entire time. when i tried to change the timestep from 0.005 to 0.004 all it did was instead of it staying at 1, it stayed at 0.8.

https://file.io/M5t6d1PrZj2O

link to the log file for when courant number stays at 1.

mesh size is (20,20,1), maximum velocity is 1m/s, distance is 0.1m, the timestep of 0.005 secs should work.