Particle tracking problem

Wendy1984 · March 15, 2011, 01:39

Hello everyone,

Does anyone know how to model bedload moving in CFX? I was trying to simulate the sediment transportation and I found that the large particles drop to the bottom due to gravity but it never stops. They continue to move even though the shear stress at that location is very low. I found in Ansys help that "Currently there is no method to accurately simulate this type of particle sliding". so just wondering what's the best way to deal with that. Just stop the partile when they hit the bottom?

Thanks,

Wendy

ghorrocks · March 15, 2011, 07:32

CFX has no models for particles packing and forming beds. You might be able to use the fluidised bed model to do what you want but that is in a Eularian context, not particle tracking.

If you want particles to pack into beds you need to consider discrete element modelling software like EDEM.

ssbear · March 15, 2011, 16:14

Quote:

Originally Posted by ghorrocks

CFX has no models for particles packing and forming beds. You might be able to use the fluidised bed model to do what you want but that is in a Eularian context, not particle tracking.

If you want particles to pack into beds you need to consider discrete element modelling software like EDEM.

I have the similar probem too.

ghorrocks, do you have any reference (tutorial, maunal, etc) for EDEM? Is it easy to use?

Thanks,

ghorrocks · March 15, 2011, 17:42

http://www.dem-solutions.com/

I have never used EDEM so cannot say anything about how easy it is to use.

March 15, 2011, 01:39	Particle tracking problem	#1
Wendy1984 New Member Wendy Join Date: Mar 2011 Posts: 4 Rep Power: 16	Hello everyone, Does anyone know how to model bedload moving in CFX? I was trying to simulate the sediment transportation and I found that the large particles drop to the bottom due to gravity but it never stops. They continue to move even though the shear stress at that location is very low. I found in Ansys help that "Currently there is no method to accurately simulate this type of particle sliding". so just wondering what's the best way to deal with that. Just stop the partile when they hit the bottom? Thanks, Wendy

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
particle tracking	Wenqing Zhang	CFX	15	August 3, 2013 07:02
particle tracking in unsteady flow	peterchen	FLUENT	1	July 22, 2010 23:18
CFX particle tracking	Mehmet SORGUN	CFX	0	February 4, 2009 14:24
Particle tracking - Domain interface / FrozenRotor	mohanrao	CFX	4	January 23, 2008 04:39
restarting lagrange (particle tracking) simulation	dbdias	CFX	0	September 22, 2007 20:26

March 15, 2011, 07:32		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,921 Rep Power: 145	CFX has no models for particles packing and forming beds. You might be able to use the fluidised bed model to do what you want but that is in a Eularian context, not particle tracking. If you want particles to pack into beds you need to consider discrete element modelling software like EDEM.

March 15, 2011, 17:42		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,921 Rep Power: 145	http://www.dem-solutions.com/ I have never used EDEM so cannot say anything about how easy it is to use.