Tabakoff erosion model inquiry

Whitebear · November 21, 2018, 04:33

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, 06:11

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, 11:05

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, 04:33	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, 06:11		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	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.

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September 2, 2019, 11:05		#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.