[karam]

The subject is somewhat impolite,

but some people who have same problem with me can understand.


First of all, Thanks for developers and sorry for the subject.


I spent almost 2 years to perform combustion simulation by OpenFOAM.

Engine, premixed flame and coal combustion furnace....etc

OpenFOAM combustion library can simulate few cases.

However, almost cases have a same error.

"Janaf thermo error"

Many users report this error for various cases

and try to solve this problem, but nobody can answer the solution for error.




At first, I think that

"It's a user's fault, OpenFOAM maybe OK for a GOOD mesh, small CFL, appropriate BCs and numerical schemes"


HOWEVER, It's NOT a user's fault.

This error always exist even though there are perfect mesh and setup.


JANAF is just a table. It just return specific heat value for a given temperature that comes from enthalpy equation.


I can't think other cause of this error except this.

"OpenFOAM combustion libraries are naturally instable."

OpenFOAM can be the best numerical analysis tool for a future, at present time, it's not.

Please, Do NOT spend your time to perform combustion using OpenFOAM

If you still want to doing, there is alternative chemistry library for OpenFOAM using cantera which is more stable according to original developer.

However, It only support OpenFOAM 1.5.x