open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello
TIME STEP : 3600
NUMBER OF TIME STEPS : 720
Why runtime is high؟؟
TIME STEP:120
NUMBER OF TIME STEPS :21600
It takes less time than the first one....
Both cases are run for a month
And which outputs are more suitable
Because my system is 5-core and it takes a lot of time in the first run.
Who can help me
kind regards

Hi there,

Are you using FEM or FVM?
Are you using the same Graphic Printout Period?

Best Regards,
José Andrés.

Hi
using large time step often leads to some difficulties to have a convergence of solutions.
You could see this with the number of iterations required to converge (in the listing file)
It's often better to reduce the time step and to increase the printout period accordingly to have the same result size with the same result time step but in a lower computation time...
As a good indicator, between 10 and 20 iterations per time step are a good ratio to obtain the lowest computation time for the entire simulation...

Regards