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-   -   number of iterations exceeded From function specieThermo (http://www.cfd-online.com/Forums/openfoam/80160-number-iterations-exceeded-function-speciethermo.html)

bruxellois September 16, 2010 23:36

number of iterations exceeded From function specieThermo
 
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::printStack(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::pureMixture<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::pureMixture<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 September 17, 2010 03:03

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 September 17, 2010 03:09

thanks for your response,

If so how can i fix that!

83_Ale_83 October 27, 2010 06:16

Hi have solved the problem by changing the controlDict file:

Quote:

writeControl adjustableRunTime;
and

Quote:

adjustTimeStep yes;
Hope this help ;)

sihaqqi August 28, 2013 04:48

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


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