Tabakoff erosion model inquiry

Whitebear · November 21, 2018, 03:33

I am modeling circulating fluidized Bed combustion and using Tabakoff erosion model. According to internal geometry erosion rate is chaged dramatically. I know the formula ane meaning of Tabakoff model but want to know the impact velocity of particle on the wall and impact degree of the particle. I can't find the varibles in CFX post. How can I get the particle information on the wall?
Second question is that particle traking calculation time is proportional to the number of particle(74000) or Maximum tracking distance(700m) and time(700s)? I put iteration frequency=10 but I have to wait 20 minute to calcuate particle tracking. I need your help.

ghorrocks · November 21, 2018, 05:11

Second question - If your particle tracking time is very long you should do a sensitivity analysis to see if the settings you are using are required. Try halving the number of particles and see if it has any effect. Then try halving the maximum tracking distance or time as well, you might be able to shorten that too.

tischroe · September 2, 2019, 10:05

Has anyone found an answer for his first question?
Have have the same problem. I can't find the velocity before the impact.

November 21, 2018, 03:33	Tabakoff erosion model inquiry	#1
Whitebear Member Jinwhan Ryuk Join Date: Feb 2013 Location: South Korea Posts: 91 Rep Power: 13	I am modeling circulating fluidized Bed combustion and using Tabakoff erosion model. According to internal geometry erosion rate is chaged dramatically. I know the formula ane meaning of Tabakoff model but want to know the impact velocity of particle on the wall and impact degree of the particle. I can't find the varibles in CFX post. How can I get the particle information on the wall? Second question is that particle traking calculation time is proportional to the number of particle(74000) or Maximum tracking distance(700m) and time(700s)? I put iteration frequency=10 but I have to wait 20 minute to calcuate particle tracking. I need your help.

November 21, 2018, 05:11		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	Second question - If your particle tracking time is very long you should do a sensitivity analysis to see if the settings you are using are required. Try halving the number of particles and see if it has any effect. Then try halving the maximum tracking distance or time as well, you might be able to shorten that too. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Question about adaptive timestepping	Guille1811	CFX	25	November 12, 2017 17:38
Error in Two phase (condensation) modeling	adilsyyed	CFX	15	June 24, 2015 19:42
Superlinear speedup in OpenFOAM 13	msrinath80	OpenFOAM Running, Solving & CFD	18	March 3, 2015 05:36
manualInjection model in sprayFoam	Mentalo	OpenFOAM Running, Solving & CFD	1	April 2, 2014 09:29
Modelling Sand erosion using Mixture model and DPM	karlchapman	FLUENT	3	July 5, 2012 08:55

September 2, 2019, 10:05		#3
tischroe New Member Join Date: Apr 2019 Posts: 5 Rep Power: 7	Has anyone found an answer for his first question? Have have the same problem. I can't find the velocity before the impact.