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species transport and non premixed model

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Old   June 22, 2020, 05:32
Default species transport and non premixed model
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Weiqiang Liu
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Hi all,

recently, I read a paper related to methane air combustion simulation with fluent. I can upload picture on CFD forum. Therefore, I can just describe the geometry here.

Air and pure methane just enters computation domain throug different inlets. The author used species transport model in fluent. However, I read fluent user guide and know that species transport model is used to model molecular level mixing of species. In this case, it's obviously not a molecular level mixing according to my understanding. I am wondering why the author used species transport model instead of non premixed model.

Best regards

Weiqiang
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Old   June 22, 2020, 05:43
Default Mixing
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Gases always mix at molecular level until there is some mechanism present or employed to keep them separated.
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Old   June 22, 2020, 09:15
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Quote:
Originally Posted by vinerm View Post
Gases always mix at molecular level until there is some mechanism present or employed to keep them separated.
yes, I get it. Thanks
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