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#1 |
Senior Member
Weiqiang Liu
Join Date: Feb 2018
Posts: 278
Rep Power: 9 ![]() |
Hi all,
I have two thermo data file at hand. one is from GRI 3.0 thermo data and the other is from n-dodecane thermo developed by Hai Wang. the former has 14 fitting coefficients and the latter has 15 fitting coefficients. I looked up chemkin user manual and found that normally there are 7 coefficients for the upper temperature range and 7 coefficients for the lower temperature range and the total number of coefficients is 14. So what is the problem with 15 coefficients? thanks. |
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#2 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,728
Rep Power: 66 ![]() ![]() ![]() |
I have heard tales of 15 coefficient thermo formulations used for by other non-chemkin mechanisms. These usually come with instructions that say "delete coefficient 15 because it is not used by chemkin." Maybe that's what you have come across.
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#3 |
Senior Member
Weiqiang Liu
Join Date: Feb 2018
Posts: 278
Rep Power: 9 ![]() |
OK, so you think I should delete coefficient 15 so that the thermo data can be imported into fluent as chemkin format thermo data?
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#4 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,728
Rep Power: 66 ![]() ![]() ![]() |
I think you should look carefully at what thermo.dat you actually have because it's clearly not a chemkin one. I don't know Hai Wang and I have no clue what you have. For all I know, the 15th coefficient could be their bank account number. And I have no clue what the mapping is from one to the other, maybe you need to delete the 1st coefficient, or the 4th. No clue.
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#5 | |
Senior Member
Weiqiang Liu
Join Date: Feb 2018
Posts: 278
Rep Power: 9 ![]() |
Quote:
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chemkin thermo |
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