[omid20110]

Hello everybody
I am simulating a heptane combustion via sprayFoam (OF 5.x)
Can anyone tell me what's this error for?

--> FOAM FATAL ERROR:
Integration steps greater than maximum 10000xStart = 0, xEnd = 5.53853e-08, x = 4.02297e-08, dxDid = 2.29093e-12

From function virtual void Foam::ODESolver::solve(Foam::scalar, Foam::scalar, Foam::scalarField&, Foam::scalar&) constin file ODESolvers/ODESolver/ODESolver.C at line 191.
FOAM exiting

I get this error at time=0.0008 s
then I stopped the simulation and just rerun the simulation, it continued till time=0.00108 then again I get the same error!

[omid20110]

No body knows about this error?!

[wyldckat]

Quick answers:

1. Not enough information, please follow the instructions given here:
   https://www.cfd-online.com/Forums/openfoam/98988-how-give-enough-info-get-help.html
2. I'm not familiar with "Integration steps greater than maximum 10000", but usually this is related to something going outside of the known expression ranges. For example, if something has a pressure and temperature that is outside of the thermodynamical polynomials, e.g. any temperature below 200K or above 5000K.

[omid20110]

Originally Posted by wyldckat

Quick answers:

1. Not enough information, please follow the instructions given here:
   https://www.cfd-online.com/Forums/openfoam/98988-how-give-enough-info-get-help.html
2. I'm not familiar with "Integration steps greater than maximum 10000", but usually this is related to something going outside of the known expression ranges. For example, if something has a pressure and temperature that is outside of the thermodynamical polynomials, e.g. any temperature below 200K or above 5000K.

It's because of the ODE model. I have changed the ODE model...

[wyldckat]

Originally Posted by omid20110

It's because of the ODE model. I have changed the ODE model...

So does that mean that by changing the ODE model this was fixed or that this happened because you changed ODE model?
And between which models did you change?

[omid20110]

Originally Posted by wyldckat

So does that mean that by changing the ODE model this was fixed or that this happened because you changed ODE model?
And between which models did you change?

Yes by changing ODE model in the chemistryProperties file this problem was fixed.
I changed it from seulex to Rosenbrock34.

[pattim]

Thanks for the suggestion - I'll give that a try. Could also try rhodas...

[mactone]

Originally Posted by omid20110

Hello everybody
I am simulating a heptane combustion via sprayFoam (OF 5.x)
Can anyone tell me what's this error for?

--> FOAM FATAL ERROR:
Integration steps greater than maximum 10000xStart = 0, xEnd = 5.53853e-08, x = 4.02297e-08, dxDid = 2.29093e-12

From function virtual void Foam::ODESolver::solve(Foam::scalar, Foam::scalar, Foam::scalarField&, Foam::scalar&) constin file ODESolvers/ODESolver/ODESolver.C at line 191.
FOAM exiting

I get this error at time=0.0008 s
then I stopped the simulation and just rerun the simulation, it continued till time=0.00108 then again I get the same error!

I encountered the same issue.
However, I start with seulex_LAPACK.
Then I tried all the ODESolvers including
Euler, EulerSI, RKCK45, RKDP45, RKF45, Rosenbrock12, 23, 34, SIBS, Trapezoid, rodas23, rodas34, selux.
All failed.

I am running the SandiaD_LTS case from the tutorial but changing the reaction mechanism to JL4 and using ode_pyJac as the ode solver.

Still can't figure out why! Maybe it's due to the ode_pyJac from DLBFoam.

Any suggestions?

[NuclearLeaf]

Can also add


solver Euler;

absTol 1e-8;

relTol 0.1;




Not sure if that info still helps