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gasoline spray simulation using dieselFoam

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Old   June 14, 2009, 15:52
Default gasoline spray simulation using dieselFoam
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Dear All,
Has anybody ever used the dieselFoam solver to simulate a gasoline spray/combustion? I just wonder which fuel did you use in your simulation? I could not find any fuel type with similar properties to gasoline in the fuel library in dieselFoam, like isooctane (C8H18)...
I appreciate any suggestions from you.

Thanks a lot,
-Jason
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Old   June 16, 2009, 11:35
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Rachel Vogl
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Hi Jason,

http://foam.sourceforge.net/doc/Doxy...2d8a6a643.html

I guess that is the liquid you are looking for?
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Old   June 16, 2009, 15:10
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Thank you very much, Rachel.
-Jason
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Old   June 19, 2009, 02:22
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Hi Jason,

Try changing to
CHEMKINFile "$FOAM_CASE/chemkin/chem.inp";
CHEMKINThermoFile "$FOAM_CASE/chemkin/therm.dat";
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Old   June 22, 2009, 12:00
Default Gasoline injection and chemkin.inp setup
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Simone Malaguti
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Hello,
I'm trynig to simulate a gasoline injection starting from the aachenBomb tutorial. I need to change the chemkin.inp file in order to match with octane fuel propreties. May you suggest to me the costant values I have to use into the file to balance the reaction?

Thank you very much for your help
Simone
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Old   June 23, 2009, 05:02
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Quote:
Originally Posted by malaguti View Post
Hello,
I'm trynig to simulate a gasoline injection starting from the aachenBomb tutorial. I need to change the chemkin.inp file in order to match with octane fuel propreties. May you suggest to me the costant values I have to use into the file to balance the reaction?

Thank you very much for your help
Simone
for a general reaction
C_xH_y + a O_2 -> b CO_2 + c H_2O
balancing C, H and O atoms.
C: x = b -> b= x
H: y = 2c -> c = y/2
O: 2a = 2b + c -> a = b + c/2 = x + y/4
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Old   June 23, 2009, 06:52
Default Gasoline injection and chemkin.inp setup
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Thank you very much, but my question was too general. I meant the three Arrhenius coefficients used in the chem.inp: I'm not able to find the correct values for octante reaction and at the same time I'm not able to understand the meaning of the last two variable of the file (I mean the two line "FORD" in the reported code for the eptane below).



ELEMENTS
H O C N AR
END
SPECIE
C7H16 O2 N2 CO2 H2O
END
REACTIONS
C7H16 + 11O2 => 7CO2 + 8H2O 5.00E+8 0.0 15780.0! 1
FORD / C7H16 0.25 /
FORD / O2 1.5 /
END
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Old   June 23, 2009, 07:05
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http://www.cvd.louisville.edu/Course/Chemical Vapour Deposition/Manuals/chemkin/chemkin1chemkin.pdf

page 29

the correct values are trickier...
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Old   June 25, 2009, 15:51
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have tried changing to "$FOAM_CASE/chemkin/therm.dat", but the problem is still there. I think the "therm.dat" file does not contrain any data of C8H18. I assume I need to use another thermophysical model rather than "hMixtureThermo<reactingMixture>". Do you guys have any further suggestions?

Thanks a lot,
-Jason

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Hi Jason,

Try changing to
CHEMKINFile "$FOAM_CASE/chemkin/chem.inp";
CHEMKINThermoFile "$FOAM_CASE/chemkin/therm.dat";
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