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-   -   pressure doesn't rise in combustion (https://www.cfd-online.com/Forums/fluent/95749-pressure-doesnt-rise-combustion.html)

roukaia December 31, 2011 14:07

pressure doesn't rise in combustion
 
hi every body, i need to simulate tne combustion in diesel engines i managed to found to fire the temperature gets 1700k but the pressure still constant no changes i used finite rate / eddy dissipation model
does any one know why
any help will be appreciated

zarezade0329 June 5, 2017 08:47

Quote:

Originally Posted by roukaia (Post 337474)
hi every body, i need to simulate tne combustion in diesel engines i managed to found to fire the temperature gets 1700k but the pressure still constant no changes i used finite rate / eddy dissipation model
does any one know why
any help will be appreciated

hi roukaia.
your post is for a long time ago and now i have a problem exactly like you.
if you solved your problem, please help me.
i am simulating an spark ignition engine in fluent and i'm using finite rate/eddy dissipation like you. tempreture rise up to 1600k but pressure isnt good.

Ash Kot June 5, 2017 09:43

ANSYS fluent shows less pressure compared to experimental pressure, in terms of Pressure drop. This is really stupid, I don't know if it's bug or you need to use the UDF with parabolic profile of flow.


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