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February 13, 2001, 20:40 |
about finite reaction model in fluent
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#1 |
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Hi,
I want to use finite rate reaction model to simulate the burning of carbon-monoxide(CO) and oxygen(O2),including backward reaction. If someone know the Pre-exponential Factor and Activation Energy(j/kgmol),please tell me. Thank you. Thank you. lizihujx 2000.2.14 |
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February 14, 2001, 20:22 |
Re: about finite reaction model in fluent
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#2 |
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From Westbrook and Dryer 1981 (email me for exact ref since I don't have it with me today),
I got for the forward reaction rate (kmol/m3-s) kf = 3.98e14 * exp(-E/RT) [CO]^1 [H2O]^0.5 [O2]^0.25 where E = 167.36 KJ/mol. According to recent papers the backward reaction they present causes numerical problems and several authors ommit it. I did the same, but I haven't played with this much yet but intend to soon. ps: have you tried the standard fluent reaction model??? Unfortunately, I can't work out where Fluent get their numbers from in the propdb.scm database - does anybody know? How can we use there numbers when we don't know where they come from???????? Greg |
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February 16, 2001, 09:13 |
Re: about finite reaction model in fluent
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#3 |
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It seems like the data is consistent with what is found in chemkin, some guy in Israel has an online repository that uses slightly different temperature intervals for the interpolation polynomials:
ftp://ftp.technion.ac.il/pub/support...thermodynamics enjoy, -Paal |
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