Elemental imbalance in H in reaction

Abhishekd18 · November 8, 2011, 01:52

Hi everyone,

I am trying to run sprayFoam. I am using C12H26 and have added the specie in therm.dat and reaction in chem.inp.

ELEMENTS
H O C N AR
END
SPECIE
C12H26 O2 N2 CO2 H2O
END
REACTIONS
2C12H26 + 37O2 => 24CO2 + 26H2O 3.00E+5 0.0 15780.0! 1
FORD / C12H26 0.75 /
FORD / O2 1.5 /
END

I am getting following error.

--> FOAM FATAL ERROR: Elemental imbalance in H in reaction irreversibleArrheniusReaction 2C12H26^0.75 + 37O2^1.5 = 24CO2 + 26H2O on line 10 From function chemkinReader::addReaction in file chemistryReaders/chemkinReader/chemkinReader.C at line 782. FOAM exiting

Where is the imbalance?

hismother · February 3, 2012, 14:07

I am having the same problem. Does anyone know how to fix it???

Abhishekd18 · February 3, 2012, 21:37

Formatting of the therm.dat file is crucial. copy/paste the numbers below into your therm.dat-file and try that.

Code:
C12H26 121687O 0C 12H 26 G 0200.00 6000.000 1000.00 1
3.70187925E+01 5.54721488E-02-1.92079548E-05 3.08175574E-09-1.84800617E-13 2
-5.26984458E+04-1.61453501E+02 2.13264480E+01-3.86394002E-02 3.99476113E-04 3
-5.06681097E-07 2.00697878E-10-4.22475053E+04-4.85848300E+01-3.49836226E+04 4

Abhishekd18 · February 3, 2012, 21:38

http://www.galcit.caltech.edu/EDL/pu...s/chemkin.html

v_b · August 21, 2021, 11:16

I have the same problem. I am sure that the problem is related to the imbalance Tolerance. How can I set it? Thanks.

November 8, 2011, 01:52	Elemental imbalance in H in reaction	#1
Abhishekd18 Member Abhishek Join Date: Dec 2010 Posts: 39 Rep Power: 15	Hi everyone, I am trying to run sprayFoam. I am using C12H26 and have added the specie in therm.dat and reaction in chem.inp. ELEMENTS H O C N AR END SPECIE C12H26 O2 N2 CO2 H2O END REACTIONS 2C12H26 + 37O2 => 24CO2 + 26H2O 3.00E+5 0.0 15780.0! 1 FORD / C12H26 0.75 / FORD / O2 1.5 / END I am getting following error. --> FOAM FATAL ERROR: Elemental imbalance in H in reaction irreversibleArrheniusReaction 2C12H26^0.75 + 37O2^1.5 = 24CO2 + 26H2O on line 10 From function chemkinReader::addReaction in file chemistryReaders/chemkinReader/chemkinReader.C at line 782. FOAM exiting Where is the imbalance?

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February 3, 2012, 14:07		#2
hismother New Member Terrence Nguyen Join Date: Jan 2012 Posts: 13 Rep Power: 14	I am having the same problem. Does anyone know how to fix it???

February 3, 2012, 21:37		#3
Abhishekd18 Member Abhishek Join Date: Dec 2010 Posts: 39 Rep Power: 15	Formatting of the therm.dat file is crucial. copy/paste the numbers below into your therm.dat-file and try that. Code: C12H26 121687O 0C 12H 26 G 0200.00 6000.000 1000.00 1 3.70187925E+01 5.54721488E-02-1.92079548E-05 3.08175574E-09-1.84800617E-13 2 -5.26984458E+04-1.61453501E+02 2.13264480E+01-3.86394002E-02 3.99476113E-04 3 -5.06681097E-07 2.00697878E-10-4.22475053E+04-4.85848300E+01-3.49836226E+04 4

February 3, 2012, 21:38		#4
Abhishekd18 Member Abhishek Join Date: Dec 2010 Posts: 39 Rep Power: 15	http://www.galcit.caltech.edu/EDL/pu...s/chemkin.html

August 21, 2021, 11:16		#5
v_b New Member Join Date: Aug 2021 Posts: 2 Rep Power: 0	I have the same problem. I am sure that the problem is related to the imbalance Tolerance. How can I set it? Thanks.