Re: [DEM Theory] Limit size of particle ?

Posted by Damien André on
URL: http://granoo.326.s1.nabble.com/DEM-Theory-Limit-size-of-particle-tp98p100.html

Hello Vinh,
MD and DEM are absolutely same approaches. Differences are mainly the interactions laws between particles.

-> MD uses van der Waals laws able to simulate interactions between molecules.
-> DEM uses rheological model able to simulation contacts between grains
-> GranOO uses beam model able to mimic cohesive media

Depending on your physical problem (scale, material...) you are free to choose between these approaches.
In GranOO, the resulting behaviors do not depend on the scale.

You can use the same model for nano-micro-meso-mega scales, it will not affect results. But, if you want to simulate something at nano-scale, colloidal interactions become non-negligible and MD models will be more suitable for your physical problem.