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March 26, 2017, 10:08
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How to solve an extra equation in Star-CCM+
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#1 |
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Member
Join Date: Oct 2014
Posts: 43
Rep Power: 12  |
Hi, everyone.
I am using Star-CCM+ 11.02 to perform some simulations related to specific flow with multi-components. And now, there is a question about how to solve extra mixture fraction transport equation and the variance of mixture fraction transport equation. Is there anyone know how to do that? Please give me a hand on this question. Thanks for any reply and discussion. Shan |
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March 26, 2017, 14:07
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#2 |
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Senior Member
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 25 |
You might be able to do this with user code, but even that could be a stretch.
This is not really what STAR-CCM+ is good at. You should be looking at OpenFOAM. |
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March 26, 2017, 17:56
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#3 | |
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Senior Member
Lane Carasik
Join Date: Aug 2014
Posts: 692
Rep Power: 15 |
Quote:
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March 27, 2017, 10:34
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#4 |
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Member
Join Date: Oct 2014
Posts: 43
Rep Power: 12 |
Thanks for you suggestion. I do think that turning to other software is a good idea and I also know that in Fluent it's easy to solve extra equation by using UDF.
Before that, I'll try my best to realize it by StarCCM+. |
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March 27, 2017, 10:35
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#5 | |
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Member
Join Date: Oct 2014
Posts: 43
Rep Power: 12 |
Quote:
Before that, I'll try my best to realize it by StarCCM+. |
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March 27, 2017, 10:39
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#6 | |
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Member
Join Date: Oct 2014
Posts: 43
Rep Power: 12 |
Quote:
 contact engineers is the only way if I reached the dead end.
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March 31, 2017, 22:17
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#7 |
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Senior Member
Chaotic Water
Join Date: Jul 2012
Location: Elgrin Fau
Posts: 438
Rep Power: 18 |
What kind of fraction of what kind of mixture? - Multi-component liquid or dispersed fraction?
What are the equations you want to solve? |
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April 1, 2017, 23:21
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#8 |
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Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,764
Rep Power: 66 |
You haven't told us what equation you want to solve.
Mixture fraction and variance of mixture fraction for example are part of the combustion models and you might be able to hack them. |
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April 14, 2017, 06:27
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#9 | |
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Member
Join Date: Oct 2014
Posts: 43
Rep Power: 12 |
Quote:
The mixture is multi-component gas. And the equations are the transport equations of the mean mixture fraction and the mixture fraction variance, as attached. |
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April 14, 2017, 06:41
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#10 | |
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Member
Join Date: Oct 2014
Posts: 43
Rep Power: 12 |
Quote:
The equations are attached. As what you pointed out, the mixture fraction and variance of mixture fraction are part of the FGM or other combustion models. I spent several days on how to do this. So do you have any idea on this? Thank you in advance. Best wishes Shan |
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April 15, 2019, 22:42
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#11 |
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New Member
clarence
Join Date: Feb 2016
Posts: 1
Rep Power: 0 |
Hi everyone
I am facing a similar problem, trying to add concentration variance transport equation into STAR-CCM. I guess that canbe achieved by usercode and library. But I am not sure if there is a better solution.  Did anyone have a try on it? Best regards |
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