Hi i wanted t run an LES simulation for the given link but couldnt get my CFL number below 1
Hi there, to begin with, I recommend that you check our Courant number troubleshooting pages:
- How To Keep the Courant Number Below 1 | SimScale
- The CFL Condition and How to Choose Your Timestep Size | SimScale
- Why do Multiphase Simulations Take so Long? | SimScale
Let me know if these are helpful 
Best regards,
Fillia