Hi I’m user of graduated student.

I have some question for this model,

I want to know how to calculate the Time Step in EFDC source code.

I wonder that CFL number is calculated in this process such as

(\delta x * u)/\delta t + (\delta y * u)/\delta t + (\delta z * u)/\delta t < 1

but I calculated it with hand, it is quite different with EFDC time step CFL number.

i have a very simple gird that x, y, z is 100m*20m*1m

and grid size is 2m*1m (grid number 50*20)

and when i calculated it with my hand to use that equation, i got 1500s

but in the efdc model, that suggest 0.14s CFL number.

how i supposed to know that time step in EFDC?

please answer me.

thanks.