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October 27, 2014, 09:37 |
QMOM Boundary Values
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#1 |
New Member
Laurens Tijsseling
Join Date: Oct 2014
Location: Delft
Posts: 4
Rep Power: 11 |
When using the QMOM method to solve the PBE's Fluent requires boundary values for each moment (0 to 5). After a thorough literature research I haven't been able to find how to compute these boundary values.
Anyone with a solution? |
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September 23, 2015, 21:50 |
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#2 |
New Member
Meng Liu
Join Date: Sep 2015
Posts: 14
Rep Power: 10 |
Now,do you know how to set boundary values?
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October 9, 2015, 06:23 |
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#3 |
New Member
Laurens Tijsseling
Join Date: Oct 2014
Location: Delft
Posts: 4
Rep Power: 11 |
Yes I did! Have you found them yet or do you need help?
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October 9, 2015, 07:13 |
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#4 |
New Member
Meng Liu
Join Date: Sep 2015
Posts: 14
Rep Power: 10 |
Yes,I need! What's the principle to set the BC values of moments. Did your simulation results coincide with your expectations? Did you ever try DQMOM method?
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October 9, 2015, 07:20 |
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#5 |
New Member
Meng Liu
Join Date: Sep 2015
Posts: 14
Rep Power: 10 |
Yes,I need! What's the principle to set the BC values of moments. Did your simulation results coincide with your expectations? Did you ever try DQMOM method?
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October 9, 2015, 08:41 |
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#6 |
New Member
Laurens Tijsseling
Join Date: Oct 2014
Location: Delft
Posts: 4
Rep Power: 11 |
They did eventually agree with the expected results. I have not used the DQMOM, as I was only working with two phases.
You know moment-0 is the number of bubbles, moment-1 the total length, moment-2 the total area and moment-3 the total volume. You need these values in #/m3. The parameter you decide is the diameter of the bubble. Please note that moment-3 has the same value regardless of the bubble diameter. As I only specified boundary conditions at the inlet, moment-0 was 1/volume one bubble and the others can be deduced from there. I achieved most succes using the Luo coalescence and break up kernel. |
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October 9, 2015, 08:58 |
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#7 |
New Member
Meng Liu
Join Date: Sep 2015
Posts: 14
Rep Power: 10 |
Sorry, I can't understand what you mean by the following. Can you explain it in detail?
“You need these values in #/m3. The parameter you decide is the diameter of the bubble. Please note that moment-3 has the same value regardless of the bubble diameter. As I only specified boundary conditions at the inlet, moment-0 was 1/volume one bubble and the others can be deduced from there” |
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October 9, 2015, 09:13 |
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#8 |
New Member
Laurens Tijsseling
Join Date: Oct 2014
Location: Delft
Posts: 4
Rep Power: 11 |
I'll send you a PM for contact details.
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October 9, 2015, 21:02 |
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#9 |
New Member
Meng Liu
Join Date: Sep 2015
Posts: 14
Rep Power: 10 |
OK, thank you. Or you can send me an email. My email is nel86@qq.com.
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December 5, 2015, 01:07 |
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#10 |
New Member
wubin
Join Date: Dec 2015
Posts: 5
Rep Power: 10 |
Hellow, have you meet the trouble about adding correction term into sorce term? I don't know how to add it reasonablely.
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May 5, 2016, 00:00 |
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#11 |
New Member
Join Date: May 2016
Posts: 4
Rep Power: 9 |
Up this topic
Really need the answer tho |
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November 14, 2017, 01:57 |
QMOM boundary moment values
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#12 | |
New Member
Chuchu Liang
Join Date: Nov 2017
Posts: 1
Rep Power: 0 |
Quote:
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May 13, 2019, 00:40 |
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#13 |
New Member
Dhiraj Lote
Join Date: Jul 2015
Location: Mumbai, India
Posts: 18
Rep Power: 10 |
Hello,
Can you please help me for reconstruction of bubble size distribution from QMOM |
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May 27, 2020, 04:05 |
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#14 | |
New Member
Wang Mengdie
Join Date: May 2020
Posts: 1
Rep Power: 0 |
Quote:
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