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How to implement hydrogen combustion?

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Old   August 31, 2022, 18:06
Default How to implement hydrogen combustion?
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Lucas Pelizzari
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I just want a BC injecting Hydrogen (H2) and have it combust with air (0.78N2 + 0.22O2) inside the domain, and the output should be N2, O2 and H2O, simple as that. There's no ignition, hopefully the air temperature (>1000K) should take care of that.

The Fluent tutorial (https://www.afs.enea.it/project/nept...ug/node537.htm) has proven unfruitful so far. It behaves like I'm just injecting more air into the domain.

Should I use the premixed or non-premixed model? It seems to be non-premixed, because, intuitively, premixed sounds like what you would have in a reciprocating engine.

What else can I do?
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Old   August 31, 2022, 19:59
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increase temperature locally in the beggining of simulation
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Old   August 31, 2022, 21:31
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Quote:
Originally Posted by AlexanderZ View Post
increase temperature locally in the beggining of simulation
How so? Can you be more specific?
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Old   September 1, 2022, 04:35
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You can patch high temperature (2000K) and high intermediates and product mass concentration in the initial filed.
In your case, the non-premixed model seems more accurate.
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Old   September 6, 2022, 02:52
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press initialize, then PATCH option will be avaliable
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