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December 10, 2014, 23:40 |
Stratified flow mixing with water
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#1 |
New Member
KaiWang
Join Date: Nov 2014
Posts: 11
Rep Power: 12 |
Hello, everyone. Recently I want to do a simulation on the mixing of two pipes.
The main pipe contains stratified flow and the branch pipe contains sub-cooled water. And condensation must be considerated. I have read some papers and find that the NEPTUNE-CFD can do this, they used this to simulate the COSI experiment. But they have implemented many other models such as Large interface recognition model, three cells thick large interface method and so on. Since I cannot obtain NEPTUNE_CFD(not open to others except EDF,CAE), I was wondering whether I can do things like this with other software like CFX ,or fluent or ccm+? And how? Should I also implement some models or should I just use the default model? Thanks very much in advance. |
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December 11, 2014, 00:34 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,864
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CFX has extensive multiphase modelling capability so can probably do the simulation you describe. But you are describing a very complex multiphase model. It is not a simulation to be attempted by beginners.
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December 11, 2014, 02:16 |
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#3 |
New Member
KaiWang
Join Date: Nov 2014
Posts: 11
Rep Power: 12 |
I see. Is it possible that it can be done without implementing other models? ie, can I do that just with what it has in CFX?
Besides, if I just run a simulation without phase change, will it be more realistic to firstly run it out? |
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December 11, 2014, 04:50 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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CFX has many multiphase models (mixing models, free surface models), and also has many phase change models. So it has the capability to model most flows.
You have not described what you are modelling so I cannot assess whether a model without phase change will be adequate. |
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December 12, 2014, 23:16 |
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#5 |
New Member
KaiWang
Join Date: Nov 2014
Posts: 11
Rep Power: 12 |
Understood. I am now simulating an air-water stratified flow from main pipe mixing with water from branch pipe. I am using inhomogeneous free surface flow, but it cannot converge, I was just wondering how I can do something like this. I read something about the LIM(Large Interface Model) in Neptune _CFD. Is there something like LIM in CFX since I cannot get Neptune _CFD code.
[IMG]http://a2.qpic.cn/psb?/V10drRp30jvf3u/xaoY2H4JfrYkATyF*i04FHMtThN92ETFQaqvfASCuDs!/m/dNPUIuMsAAAAnull&bo=vgL6AAAAAAAFB2I!&rf=photolist& t=5[/IMG] |
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December 13, 2014, 07:09 |
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#6 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,864
Rep Power: 144 |
I am not familiar with the large interface model or with Neptune CFD.
Have a look in the CFX documentation and see if the models it has available are suitable for you. |
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