particle depositon,les

April 24, 2003, 06:03

i am doing submicron particles from 0.7um to 7um. what puzzle me most is that i got the results almost the same, that is the number of the deposited particle for 0.7um is almost the same as that for 7um.

i thought maybe it is because the brownian force is not treated well in the caculation since i am using les and dpm , and it is turbulent flow in my model. i found in the fluent manual that brownian force is not suitable for turbuelent flow, i feel very strange why it can;'t be treated in turbulent flow.

Could anybody give me some suggestion?thanks!

April 25, 2003, 14:14

Hello Candy!

Until I know, you cannot used LES and DPM models because they are not compatible, see apendix A fluent user's guide. Evenmore, I personaly talk to Fluent support and they said that the LES and DPM are not compatible. In addition, a couple days ago, someone post a note asking why particle tracking could not be activate if the flow field was estimated with the LES model.

Anyway, I am sure that you cannot use the DPM model with the LES model.

Best regards

Alex Munoz

April 24, 2003, 06:03	particle depositon,les	#1
candy Guest Posts: n/a	i am doing submicron particles from 0.7um to 7um. what puzzle me most is that i got the results almost the same, that is the number of the deposited particle for 0.7um is almost the same as that for 7um. i thought maybe it is because the brownian force is not treated well in the caculation since i am using les and dpm , and it is turbulent flow in my model. i found in the fluent manual that brownian force is not suitable for turbuelent flow, i feel very strange why it can;'t be treated in turbulent flow. Could anybody give me some suggestion?thanks!

April 25, 2003, 14:14	Re: particle depositon,les	#2
Alex Munoz Guest Posts: n/a	Hello Candy! Until I know, you cannot used LES and DPM models because they are not compatible, see apendix A fluent user's guide. Evenmore, I personaly talk to Fluent support and they said that the LES and DPM are not compatible. In addition, a couple days ago, someone post a note asking why particle tracking could not be activate if the flow field was estimated with the LES model. Anyway, I am sure that you cannot use the DPM model with the LES model. Best regards Alex Munoz

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DPM particle time step	amos	FLUENT	1	January 4, 2020 08:46
Blood Damage Modelling via Particle Tracking in a Centrifugal Heart Pump	scatman	CFX	7	January 8, 2018 00:59
Problems involved heat transfer inside a particle and its thermal degradation	zhangr	STAR-CCM+	2	August 25, 2011 06:59
Particle Tracking for ion	Jun	CFX	2	August 31, 2010 08:19
DPM UDF particle position using the macro P_POS(p)[i]	dm2747	FLUENT	0	April 17, 2009 01:29