Hi all,
I am confusing about time in CFDEM modelling. For example, I set up the end time in Controldict is 0.2 s. Is this real time ? When comparing with experiment, it does not match. For example the experiment takes much longer time than 0.2 s to get the same condition as generated by simulation. Some published papers report their modelling results with total time 0.02 s for a 0.12x0.06x0.06 m box containing sand; this does not make sense to me at all.
Can some one explain about this ?
Thank you,
Regards,
cgoniva | Fri, 12/30/2016 - 11:35
Simulation and Real (experiment) time
Hello NTT1580,
from equations point of view the time in the simulation should match the time in the experiment.
Depending on the case this might not be realistic - e.g. onset of a turbulent flow strongly depends on the initial condition, which is in a simulation often "perfect & symmetric" which cannot be the case in an experiment.
Best regards,
Christoph