Running DESID Module on CMAQ-HDDMv5.4

[lizadams]

Hi,

I found this nice explanation of the error message that you are getting.

Understanding the Importance of the CFL Condition in CFD Simulations

I would try running your scenario without DDM-3D and see if you encounter the same error.

This post may also help you try adjusting settings for the base case (without DDM-3D) in the run script.

Questions on CMAQ CTM_MAXSYNC and CTM_ADV_CFL settings

Actually, as a mathematician I am much happier about runs with Courant number less than 1/SQRT(2) ~ 0.7 — after all, horizontal advection is a two-dimensional process relating to winds with magnitude SQRT(U^2+V^2) And then there’s the coupling with other physical processes (also affected by the coupling time-step)…

Once you solve the issue with your base case, then you can try the DDM-3D instrumented version.

Liz