Setting time steps and no. of iterations

Vidya Raja

Hi all,

I want to model an unsteady velocity condition. For this, is there any specific criteria to set up the number of iterations, time step size, max no. of iterations per time step etc? Or do we just play around, starting with a small number like 0.01 and then adjust accordingly? How do we evaluate which is the best combination of these numbers?

One other question- I hooked my unsteady velocity profile to Fluent, and then interpreted it. But when I ran the case, I do not see the waveform on the screen (along with the velocity vectors, etc). Is there any reason for this? How do I get the waveform pattern to show up?

Thanks in advance for any advice/ suggestions.

Regards, Vidya