Problem with some warnings

Submitted by nicolasoviedoc on Thu, 10/15/2015 - 17:44

Hello everybody:

I downloaded the most recent LIGGGHTS version to simulate multisphere in the inside of a mill. However, when i compile it, these warnings appear:

WARNING: time step too large or skin too small - particles may travel a distance of 3.440580 per time-step, but half skin is 0.025000
WARNING: time step way too large - particles move further than the minimum radius in one step

My question is how to fix those warnings in order to have a better simulation?.

I was thinking that perhaps my time-step is way too big for the simulation (i am using a time-step of 0.0001)

Best regards.
Nicolás

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aaigner's picture

aaigner | Thu, 10/15/2015 - 23:19

Hi Nicolas!

That's exactly what the error message says. Your particles are too fast compared to their radius (or better the skin factor).

Bests
Andreas

nicolasoviedoc | Fri, 10/16/2015 - 01:56

Thanks for answering my question, i solved my problem with your indications.