Question about units

Submitted by Sherif on Fri, 08/27/2021 - 11:28

I'm trying to simulate particles with radius 0.0002m (200 micrometers). If I used "SI" units the required dt is about 1e-6 second.

Does using "micro" units in liggghts instead of "SI" units accelerate the run time since the time unit in "micro" unit system is microseconds not second, so dt will be equal to 1 microsecond?

Is there any differences in the output results if simulating the same problem with different unit system?