dieselFoam (liquid C7H16)
Hello All,
I have q eustion about setup of thermo-physical properties file for dieselFOAM solver. The fuel C7H16 is for liquid drop, which evaporates and mixes with the surrounging air. When it evaproates it is in vapor phase and not liquid phase. But in thermophysicalPorperties file, we specify C7H16 as liquid component as below. DOes that mean that it will C7H16 as liquid when it is solving gas-phase reaction. I just want to confirm. If not then why do specifiy C7H16 as liquid in thermophysicalProperties file? Thanks, Nir |
The answer is yes... and no....It does what you tell it.
If you want it to evaporate to heptane it does that, if you want it to evaporate into water you can do that. It would be a bit weird, but its possible. But since you havent specified your input file I dont know what it does. Anyways, I've tried to describe it on these pages http://openfoamwiki.net/index.php/Co...icalProperties |
So as I understand C7H16 is considered as gas phase species in the gas phase reaction and the liquid properties is only considered during calculation of diesel droplet energy equation.
The chemkin input file is as belows (as given in the tutorial) and C7H16 is considered as the gaseous species (i.e. gaseous properties of C7H16 is considered), ELEMENTS H O C N AR END SPECIE C7H16 O2 N2 CO H2O O CO2 OH H H2 HO2 H2O2 N NO C END REACTIONS C7H16 + 11O2 => 7CO2 + 8H2O 1.00E+8 0.0 15780.0! 1 FORD / C7H16 0.25 / FORD / O2 1.5 / CO + O + M = CO2 + M 6.170E+14 0.00 3000. ! 96 CO + OH = CO2 + H 3.510E+07 1.30 -758. ! 97 CO + O2 = CO2 + O 1.600E+13 0.00 41000. ! 98 HO2 + CO = CO2 + OH 5.800E+13 0.00 22930. ! 99 ! H2 + O2 = OH + OH 1.700E+13 0.00 47780. !100 H2 + OH = H2O + H 1.170E+09 1.30 3626. !101 O + OH = O2 + H 4.000E+14 -0.50 0. !102 O + H2 = OH + H 5.060E+04 2.67 6290. !103 H + HO2 = O + H2O 3.100E+10 0.00 3590. !104 O + OH + M = HO2 + M 1.000E+16 0.00 0. !105 H2O/6.0/ CO2/5.0/ H2/3.3/ CO/2.0/ N2/0.70/ H + O2 + M = HO2 + M 2.800E+18 -.86 0.0!106 O2/0.00/ H2O/ .00/ CO/0.75/ CO2/1.50/ N2/0.0/ H + O2 + O2 = HO2 + O2 2.080E+19 -1.24 0.0!107 H + O2 + H2O = HO2 + H2O 11.26E+18 -.76 0.0!108 H + O2 + N2 = HO2 + N2 2.600E+19 -1.24 0.0!109 OH + HO2 = H2O + O2 7.500E+12 0.00 0. !110 H + HO2 = OH + OH 1.700E+14 0.0 875. !111 O + HO2 = O2 + OH 1.400E+13 0.00 1073. !112 OH + OH = O + H2O 6.000E+08 1.30 0. !113 H + H + M = H2 + M 1.000E+18 -1.00 0. !114 H2/0./ H2O/0./ CO2/0./ H + H + H2 = H2 + H2 9.200E+16 -0.60 0. !115 H + H + H2O = H2 + H2O 6.000E+19 -1.25 0. !116 H + H + CO2 = H2 + CO2 5.490E+20 -2.00 0. !117 H + OH + M = H2O + M 1.600E+22 -2.00 0. !118 H + O + M = OH + M 6.200E+16 -0.60 0. !119 O + O + M = O2 + M 1.890E+13 0.00 -1788. !120 H + HO2 = H2 + O2 1.250E+13 0.00 0. !121 HO2 + HO2 = H2O2 + O2 2.000E+12 0.00 0. !122 OH + OH (+M) = H2O2 (+M) 7.600E+13 -.37 0. !123 LOW / 4.300E+18 -.900 -1700.00/ TROE/ .7346 94.00 1756.00 5182.00 / H2/2.00/ H2O/6.00/ CO/1.50/ CO2/2.00/ N2/0.70/ H2O2 + H = HO2 + H2 1.600E+12 0.00 3800. !124 H2O2 + OH = H2O + HO2 1.000E+13 0.00 1800. !125 H2O2 + H = H2O + OH 1.000E+13 0.00 3590. !126 H2O2 + O = H2O + O2 8.400E+11 0.00 4260. !127 H2O2 + O = OH + HO2 2.000E+13 0.00 5900. !128 H2 + HO2 = H2O + OH 6.500E+11 0.00 18800. !129 ! CO2 + N = NO + CO 1.900E+11 0.00 3400. !130 N + NO = N2 + O 3.270E+12 0.30 0. !136 N + O2 = NO + O 6.400E+09 1.00 6280. !137 N + OH = NO + H 7.333E+13 0.00 1120. !138 ! END |
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