Learning Forum

[Michael Ender]

Hello everyone, 

I'm building up a model with rocky dem, where small spherical particles (5mm) are flying through a room with high velocity (max. 75 m/s). 
In between the particels will have contact with the floor, housing and a rotating knife, which accelerates the particles. 

I now wanted to ask, if someone was working with somethin similar and maybe know's which impact static, dynamic friction and rolling resistance have. 
The contact is so short that i can imagine that the influence is very small. What are your opinions on this?

Thanks in advance and kind regards 
Michel 

[Rob]

To an extent it'll depend on the particle-solid contact response. Ie how sticky/bouncy the material pair are as well as contact angle. You may be better off running both scenarios to determine what's important in your application.