The time step is about to be 3 times the horizontal resolution of your domain in km. So if your resolution is 35 km then dt should be about 35*3=105 seconds. It also depend on the values of other variables like radfrq, abemh and abatm. The value of dt required to be in multiples of the values of above variables. It also depends on the machines under use. you can find the optimum value greater or equal to 105 seconds. The bigger value of dt will save the simulation time.

Amjad.



On Mon, Dec 21, 2009 at 2:46 PM, Monica Santese <Monica.Santese@le.infn.it> wrote:
Dear users,

if I would like to make a simulation with a spatial resolution ds=35, what
dt and abatm values you suggest me?

Thank you


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