[wangqiuxiao]

hi，I am a new openfoam user, I use openfoam10 and run tutorial SandiaD_LTS， it's Ok。then, I changed the mechanism from gri30 to a 2-step mehcanism:
CH4 + 2O2 => CO2 + 2H2O 3e13 0.0 47e3
FORD / CH4 0.7 /
FORD / O2 0.8 /
.

when run reactingFoam, the error happens:
--> FOAM FATAL ERROR:
HO2 not found in table. Valid entries:
5
(
N2
CO2
O2
CH4
H2O
)


From function const T& Foam::HashTable<T, Key, Hash>:perator[](const Key&) const [with T = int; Key = Foam::word; Hash = Foam::string::hash]
in file /home/ubuntu/OpenFOAM/OpenFOAM-10/src/OpenFOAM/lnInclude/HashTableI.H at line 126.


do you know the reason?

[überschwupper]

This error means, that somewhere in the code the HO2 species is needed, but only 5 species are initialized

I would guess you either have a HO2 file in your 0/ directory or you forgot to delete HO2 entry somewhere in the initialization files in the constant directory.


Grep your Case folders for "HO2" and check if there are valid entries left.

[wangqiuxiao]

Originally Posted by überschwupper

This error means, that somewhere in the code the HO2 species is needed, but only 5 species are initialized

I would guess you either have a HO2 file in your 0/ directory or you forgot to delete HO2 entry somewhere in the initialization files in the constant directory.


Grep your Case folders for "HO2" and check if there are valid entries left.

hi， thank you , I have solved this problem. there is something wrong in chemistryProperties file.

[wangqiuxiao]

Originally Posted by wangqiuxiao

hi， thank you , I have solved this problem. there is something wrong in chemistryProperties file.

hi I have another question. how to set the chemistryType and odeCoeffs?
chemistryType
{
solver ode;
method standard;
}

chemistry on;

initialChemicalTimeStep 1e-7;
//maxChemicalTimeStep 1e-3;

odeCoeffs
{
solver Rosenbrock34;
absTol 1e-8;
relTol 1e-1;
}



when I use Rosenbrock34, the calculation is very slow
when I use seulex, the calcualtion is fast, but it's easy to divergence

[dlahaye]

Possibly you find information by looking into modern implementation such as https://github.com/blttkgl/DLBFoam-1.0

[wangqiuxiao]

Originally Posted by dlahaye

Possibly you find information by looking into modern implementation such as https://github.com/blttkgl/DLBFoam-1.0

thank you very much. this code is very useful for me.