how to increase maximum number iterations to > 1000?

phsieh2005 · June 11, 2011, 22:50

Hi,

I am solving an interFoam case. When solving p_rgh, maximum iterations is 1000 (when using PCG). Is there a way to increase to a higher number?

Thanks!

Pei

boger · June 12, 2011, 09:18

lduMatrix has a maxIter parameter, at least in the version of OpenFOAM I'm looking at

phsieh2005 · June 12, 2011, 10:28

Hi, David,

Thanks for the reply!

But,where can I find lduMatrix?

Pei

phsieh2005 · June 12, 2011, 10:40

Hi, David,

OK, I found lduMatric.H that references maxIter. But, I am still looking for where maxIter is given.

See you at PSU tomorrow.

Pei

boger · June 12, 2011, 10:41

You can find lduMatrix as a class in the C++ code, either through the files or through Doxygen (e.g. go to http://www.openfoam.com/docs/cpp/ and search for maxIter).

If you're not interested in the source code, the point is this: you can add maxIter as an entry in your PCG dictionary in fvSolution and set its value to whatever you want. (1000 is the default.)

phsieh2005 · June 12, 2011, 10:50

Hi, David,

Thanks a lot!

I found out that the default was set in lduMatrixSolver.C.

Also nice to know that I can specify this in PCG dictionary without changing the source code.

Pei

dimyriy · September 25, 2011, 18:02

Thanks. Your topic unbelievable helps me!!

June 11, 2011, 22:50	how to increase maximum number iterations to > 1000?	#1
phsieh2005 Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 334 Rep Power: 18	Hi, I am solving an interFoam case. When solving p_rgh, maximum iterations is 1000 (when using PCG). Is there a way to increase to a higher number? Thanks! Pei

June 12, 2011, 09:18		#2
boger Senior Member David Boger Join Date: Mar 2009 Location: Penn State Applied Research Laboratory Posts: 146 Rep Power: 17	lduMatrix has a maxIter parameter, at least in the version of OpenFOAM I'm looking at __________________ David A. Boger

June 12, 2011, 10:41		#5
boger Senior Member David Boger Join Date: Mar 2009 Location: Penn State Applied Research Laboratory Posts: 146 Rep Power: 17	You can find lduMatrix as a class in the C++ code, either through the files or through Doxygen (e.g. go to http://www.openfoam.com/docs/cpp/ and search for maxIter). If you're not interested in the source code, the point is this: you can add maxIter as an entry in your PCG dictionary in fvSolution and set its value to whatever you want. (1000 is the default.) __________________ David A. Boger

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June 12, 2011, 10:28		#3
phsieh2005 Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 334 Rep Power: 18	Hi, David, Thanks for the reply! But,where can I find lduMatrix? Pei

June 12, 2011, 10:40		#4
phsieh2005 Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 334 Rep Power: 18	Hi, David, OK, I found lduMatric.H that references maxIter. But, I am still looking for where maxIter is given. See you at PSU tomorrow. Pei

June 12, 2011, 10:50		#6
phsieh2005 Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 334 Rep Power: 18	Hi, David, Thanks a lot! I found out that the default was set in lduMatrixSolver.C. Also nice to know that I can specify this in PCG dictionary without changing the source code. Pei

September 25, 2011, 18:02		#7
dimyriy New Member Dimyriiy Bogdanov Join Date: Mar 2011 Location: Saint-Petersburg, Russia Posts: 5 Rep Power: 15	Thanks. Your topic unbelievable helps me!!