Dear all,
Is it possible to deal with the case that particle size is smaller than the grid size? And how to separate the particle volume and drag force into small CFD cells? It is a problem that can nor be avoided when I want to control the Courant number in the local region with high velocity.
Goniva (2012) mentioned "so-called non-resolved approach presented here is applicable to those cases where particle sizes are smaller than the computational grid" . However, It seems that the case can run without errors when CFD cells are smaller than particle sizes.
Thank you in advance for any suggestion.
Best regards,
Zhaochen
Daniel Queteschiner | Fri, 11/06/2015 - 12:44
Unresolved CFDEM
In unresolved CFDEM simulations, particles must be smaller than the cell size. The simulation may still run fine if they are larger but the results will probably be erroneous since the void fraction will be calculated incorrectly. I suggest to use a cell size that is 3-10 times the size of the particles.
Esi | Mon, 03/04/2019 - 13:39
Is it possible to simulate
Is it possible to simulate the turbulent flow of gas and solids inside a pipe with cfdem?
Since it's turbulent flow, the cell size near to wall should be very small and it's less than particle size. How cfdemdeal with it when calculating void fraction in each cell? in other words, can a cell size be smaller than particle size in cfdem?
I would really appreciate if you could help me with this problem.
Thanks
Esi