lagrangian-intermediate-particle diameter and grid size?

Xinze · November 6, 2011, 20:57

I wonder whether particle diamerter must smaller than grid size for colliding cloud or icoUncoupleParcelFoam. where restrict this things in the algorithm of OF implimenting.

thanks in advance!

xz

niqbal · November 15, 2011, 08:05

Hi Xz,
To me it seems, there is not any limitation of grid size in the solver (icoUncoupleParcelFoam) as it is uncoupled, however this is not the case when you have coupling case. And the problem comes in the drag models, where in case you have particle size greater than the the cell size, it will create problems. Then you are supposed to go for resolved methods. Hope this might be of some help.

November 6, 2011, 20:57	lagrangian-intermediate-particle diameter and grid size?	#1
Xinze New Member Xinze Join Date: Mar 2009 Location: Shenyang, China Posts: 14 Rep Power: 17	I wonder whether particle diamerter must smaller than grid size for colliding cloud or icoUncoupleParcelFoam. where restrict this things in the algorithm of OF implimenting. thanks in advance! xz

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Lagrangian Particle Tacking	Nording	OpenFOAM Programming & Development	1	May 30, 2010 08:03
grid size	jay	Siemens	6	September 5, 2008 05:00
grid size for DNS	dirk	Main CFD Forum	5	July 27, 2005 04:02
Multiphase models-grid size?	Yvonne	FLUENT	0	June 11, 2002 03:38

November 15, 2011, 08:05		#2
niqbal New Member Naveed Iqbal Join Date: Oct 2009 Location: Germany Posts: 19 Rep Power: 16	Hi Xz, To me it seems, there is not any limitation of grid size in the solver (icoUncoupleParcelFoam) as it is uncoupled, however this is not the case when you have coupling case. And the problem comes in the drag models, where in case you have particle size greater than the the cell size, it will create problems. Then you are supposed to go for resolved methods. Hope this might be of some help.