Cyclone separator simulation

Wayne12195 · August 18, 2019, 10:36

Hi, guys
This is a student who is simulating cyclone separator thesis results validation.

I have tried to validate results with the following set to validate thesis CFD results, cut off size.
But, I have not validated thesis results...

I can send you my case and mesh files.
Please contact me...

* Setting up

Model
1. RSM
steady 6000 -> transient 20000(time step=0.001s, Max iteration/time step=40)
2. RNG ke

Grids
780000 ~ 800000

Hybrid initialization

Cut off size(different two designs respectively)
Thesis= 0.72, 0.72 micro meter
My simuation= 0.83, 0.9 micro meter

Seps · August 19, 2019, 06:44

Hello wayne,
I remember fighting against a cyclone some time ago, have you tried to adjust the reflection coefficients of the wall?

Wayne12195 · August 19, 2019, 23:36

Hi sir,
Thank you for your reply.
I just adjusted trap, and reflect without reflecting wall coefficients...
Could you give me advice?

I set up the entire dust bin as trap

Seps · August 26, 2019, 05:14

Hi!

By applying a reflect factor to the walls the energy of the particles will decrease, increasing the number of particles trapped by the cyclone.
As a result, I would expect a lower cut off size.

Anyway, this is a way of adjusting the results, in order to get a validated and solid simulation you should consider referring to literature about those factors or similar experimental setups.

August 18, 2019, 10:36	Cyclone separator simulation	#1
Wayne12195 New Member Seunghyun Join Date: Aug 2018 Posts: 10 Rep Power: 8	Hi, guys This is a student who is simulating cyclone separator thesis results validation. I have tried to validate results with the following set to validate thesis CFD results, cut off size. But, I have not validated thesis results... I can send you my case and mesh files. Please contact me... * Setting up Model 1. RSM steady 6000 -> transient 20000(time step=0.001s, Max iteration/time step=40) 2. RNG ke Grids 780000 ~ 800000 Hybrid initialization Cut off size(different two designs respectively) Thesis= 0.72, 0.72 micro meter My simuation= 0.83, 0.9 micro meter

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August 19, 2019, 06:44		#2
Seps New Member Join Date: Feb 2015 Posts: 10 Rep Power: 11	Hello wayne, I remember fighting against a cyclone some time ago, have you tried to adjust the reflection coefficients of the wall?

August 19, 2019, 23:36		#3
Wayne12195 New Member Seunghyun Join Date: Aug 2018 Posts: 10 Rep Power: 8	Hi sir, Thank you for your reply. I just adjusted trap, and reflect without reflecting wall coefficients... Could you give me advice? I set up the entire dust bin as trap

August 26, 2019, 05:14		#4
Seps New Member Join Date: Feb 2015 Posts: 10 Rep Power: 11	Hi! By applying a reflect factor to the walls the energy of the particles will decrease, increasing the number of particles trapped by the cyclone. As a result, I would expect a lower cut off size. Anyway, this is a way of adjusting the results, in order to get a validated and solid simulation you should consider referring to literature about those factors or similar experimental setups.