[bruxellois]

Hi,

I am trying to solve a case with sonicFoam with time dependent BC (INLET ={p =45Mpa-->101325 Pa, U=1000-->0 and T 2000k-->300K} and outlet = zerogradient for all fields).

After some iterations i got this error message:

Maximum number of iterations exceeded#0 Foam::error:rintStack(Foam::Ostream&) in "/home/moumen/OpenFOAM/OpenFOAM-1.6/lib/linux64GccDPOpt/libOpenFOAM.so"
#1 Foam::error::abort() in "/home/moumen/OpenFOAM/OpenFOAM-1.6/lib/linux64GccDPOpt/libOpenFOAM.so"
#2 Foam::ePsiThermo<Foam:ureMixture<Foam::constTran sport<Foam::specieThermo<Foam::hConstThermo<Foam:: perfectGas> > > > >::calculate() in "/home/moumen/OpenFOAM/OpenFOAM-1.6/lib/linux64GccDPOpt/libbasicThermophysicalModels.so"
#3 Foam::ePsiThermo<Foam:ureMixture<Foam::constTran sport<Foam::specieThermo<Foam::hConstThermo<Foam:: perfectGas> > > > >::correct() in "/home/moumen/OpenFOAM/OpenFOAM-1.6/lib/linux64GccDPOpt/libbasicThermophysicalModels.so"
#4 main in "/home/moumen/OpenFOAM/OpenFOAM-1.6/applications/bin/linux64GccDPOpt/sonicFoam"
#5 __libc_start_main in "/lib/libc.so.6"
#6 _start at /usr/src/packages/BUILD/glibc-2.9/csu/../sysdeps/x86_64/elf/start.S:116


From function specieThermo<thermo>::T(scalar f, scalar T0, scalar (specieThermo<thermo>::*F)(const scalar) const, scalar (specieThermo<thermo>::*dFdT)(const scalar) const) const
in file /home/dm2/henry/OpenFOAM/OpenFOAM-1.6/src/thermophysicalModels/specie/lnInclude/specieThermoI.H at line 68.

FOAM aborting

Aborted

Has anyone experienced an error like the above? Any suggestions on what it might be?

Any help will be appreciated

Best regards.

[Chris Lucas]

Hi,

this problem is quite common. Have a look through the forum.

The problem is most probably related to pressure field. Have a look at it at a time step before the error occurs. I guess you have negative pressures, so the thermophysical library crashes.

Regards,
Christian

[bruxellois]

thanks for your response,

If so how can i fix that!

[83_Ale_83]

Hi have solved the problem by changing the controlDict file:

writeControl adjustableRunTime;

and

adjustTimeStep yes;

Hope this help

[sihaqqi]

All

I have the same issue and I have been referring the forum but cannot find a solution that can get rid of this error for me. I have tried Alessandro's method but to no avail. Alex, kindly advise what you did to resolve max number of iterations exceeded.

I shall be very obliged.

Regards