[qhdgj]

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

[Rachel]

Hi Jason,

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

I guess that is the liquid you are looking for?

[qhdgj]

Thank you very much, Rachel.
-Jason

[Rachel]

Hi Jason,

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

[malaguti]

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

[niklas]

Originally Posted by malaguti

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

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

[malaguti]

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

[niklas]

http://www.cvd.louisville.edu/Course/Chemical Vapour Deposition/Manuals/chemkin/chemkin1chemkin.pdf

page 29

the correct values are trickier...

[qhdgj]

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

Originally Posted by Rachel

Hi Jason,

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

[himanhsu]

I want to use C10H22 in place of C7H16 for this what changes i have to do

[mub]

Hello Jason,
I have the same issue, i want to use iso octane rather than heptane; can you guide me how to do this.