FOAM FATAL ERROR: Maximum number of iterations exceeded

Tarak · May 9, 2011, 03:53

Hii,

I am running rhoPisoFoam for a duct using oneeqeddy LES model. After a few iterations I get the following error:

--> FOAM FATAL ERROR:
Maximum number of iterations exceeded

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/44792/OpenFOAM/OpenFOAM-1.7.1/src/thermophysicalModels/specie/lnInclude/specieThermoI.H at line 67.

FOAM aborting

Can someone please let me know how to tackle this?

Thanks,
Tarak

wschosta · July 14, 2011, 18:10

Hi Tarak,

I hope that you're not still stuck on this but if you are, my guess would be to go to

Quote:

/home/44792/OpenFOAM/OpenFOAM-1.7.1/src/thermophysicalModels/specie/lnInclude/specieThermoI.H

and see what's on line 67.

Past that I don't know. I'm guessing you built your own test case, you may have accidentally done something that's causing the iteration counter to go out of control (but I have no concept of how you would do that).

Hopefully you've already solved it!

joel.lehikoinen · July 15, 2011, 03:03

I've always been able to solve this issue by checking my boundary and initial conditions, twiddling around with the underrelaxation coefficients etc. I'm not sure, but I think this is a convergence problem when you're solving for enthalpy. Also if you're running a compressible case, make sure you have the correct coefficients in correct units in the correct order for all the T-dependent quantities! A bogus density can crash your simulation very easily.

baila12 · July 16, 2013, 09:53

Quote:

Originally Posted by joel.lehikoinen

I've always been able to solve this issue by checking my boundary and initial conditions, twiddling around with the underrelaxation coefficients etc. I'm not sure, but I think this is a convergence problem when you're solving for enthalpy. Also if you're running a compressible case, make sure you have the correct coefficients in correct units in the correct order for all the T-dependent quantities! A bogus density can crash your simulation very easily.

How do you go about making sure to have the correct coefficients in correct units in the correct order for all T-dependent quantities?

sihaqqi · August 28, 2013, 09:27

Hello Joel

How did you resolve it..I have the same issue with rhoPimpleFoam and have been trying to get rid of this error for the last week. Kindly respond. I shall be very grateful.

Regards

wouter · August 28, 2013, 18:50

Hello All,

The same problem occured with me using compressibleTwoPhaseEulerFoam. I found that the iteration over the temperature tested for negative absolute temperatures. I will check the temperature dependencies, but my problem was not solved yet.
Thanks for the advice though.

Best
wouter

gdum · November 8, 2017, 10:19

Hi,

Did you guys find a solution to this problem?

Thank you,

Gui

May 9, 2011, 03:53	FOAM FATAL ERROR: Maximum number of iterations exceeded	#1
Tarak Senior Member Tarak Join Date: Aug 2010 Location: State College, PA Posts: 111 Rep Power: 16	Hii, I am running rhoPisoFoam for a duct using oneeqeddy LES model. After a few iterations I get the following error: --> FOAM FATAL ERROR: Maximum number of iterations exceeded 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/44792/OpenFOAM/OpenFOAM-1.7.1/src/thermophysicalModels/specie/lnInclude/specieThermoI.H at line 67. FOAM aborting Can someone please let me know how to tackle this? Thanks, Tarak

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July 15, 2011, 03:03		#3
joel.lehikoinen New Member Joel Lehikoinen Join Date: Jun 2011 Posts: 26 Rep Power: 15	I've always been able to solve this issue by checking my boundary and initial conditions, twiddling around with the underrelaxation coefficients etc. I'm not sure, but I think this is a convergence problem when you're solving for enthalpy. Also if you're running a compressible case, make sure you have the correct coefficients in correct units in the correct order for all the T-dependent quantities! A bogus density can crash your simulation very easily.

August 28, 2013, 09:27		#5
sihaqqi Senior Member starter Join Date: Sep 2012 Posts: 125 Rep Power: 16	Hello Joel How did you resolve it..I have the same issue with rhoPimpleFoam and have been trying to get rid of this error for the last week. Kindly respond. I shall be very grateful. Regards

August 28, 2013, 18:50		#6
wouter Senior Member Wouter van der Meer Join Date: May 2009 Location: Elahuizen, Netherlands Posts: 203 Rep Power: 18	Hello All, The same problem occured with me using compressibleTwoPhaseEulerFoam. I found that the iteration over the temperature tested for negative absolute temperatures. I will check the temperature dependencies, but my problem was not solved yet. Thanks for the advice though. Best wouter

November 8, 2017, 10:19		#7
gdum New Member Guillaume Join Date: Oct 2017 Posts: 8 Rep Power: 9	Hi, Did you guys find a solution to this problem? Thank you, Gui