Does PISO algorithm work with interfoam in openFOAM 2.1.0?

Krishna Sandeep · June 13, 2012, 01:35

Hello everyone

I have been using openFOAM to simulate a dam break problem. The issue is that i used PISO algorithm in the "fvSolutions" file and used interFOAM as the solver. When I tried to run the program, an error message crept in as follows:
" keyword PIMPLE undefined in the file ..\fvsolutions"
But when I tried to run the same code in FOAM 1.7.x, I could see the results. What could possibly be the reason?
Please reply.....
Thank u in advance

akidess · June 13, 2012, 03:40

Solver structure changed from 1.7.x to 2.1.x, and PISO was replaced by PIMPLE. Adapt your case to the new solver - see the interFoam tutorial as a guideline.

Phicau · June 13, 2012, 03:50

Hi Krishna

just change PISO for PIMPLE within fvSolution and everything will run again. Furthermore, PIMPLE is a merging of PISO and SIMPLE algorithms, if you do not specify any overrelaxation factor you will still use PISO: when the simulation starts you can read - PIMPLE: Operating solver in PISO mode

Krishna Sandeep · June 14, 2012, 02:32

Thank u everyone

I shall try using PIMPLE....

June 13, 2012, 01:35	Does PISO algorithm work with interfoam in openFOAM 2.1.0?	#1
Krishna Sandeep New Member Krishna Sandeep Join Date: Jun 2012 Posts: 12 Rep Power: 14	Hello everyone I have been using openFOAM to simulate a dam break problem. The issue is that i used PISO algorithm in the "fvSolutions" file and used interFOAM as the solver. When I tried to run the program, an error message crept in as follows: " keyword PIMPLE undefined in the file ..\fvsolutions" But when I tried to run the same code in FOAM 1.7.x, I could see the results. What could possibly be the reason? Please reply..... Thank u in advance Last edited by Krishna Sandeep; June 13, 2012 at 02:12.

June 13, 2012, 03:40		#2
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 30	Solver structure changed from 1.7.x to 2.1.x, and PISO was replaced by PIMPLE. Adapt your case to the new solver - see the interFoam tutorial as a guideline. Krishna Sandeep, babakflame and zeynab hoseini like this. __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

June 13, 2012, 03:50		#3
Phicau Senior Member Pablo Higuera Join Date: Jan 2011 Location: Auckland Posts: 627 Rep Power: 19	Hi Krishna just change PISO for PIMPLE within fvSolution and everything will run again. Furthermore, PIMPLE is a merging of PISO and SIMPLE algorithms, if you do not specify any overrelaxation factor you will still use PISO: when the simulation starts you can read - PIMPLE: Operating solver in PISO mode Krishna Sandeep likes this.

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June 14, 2012, 02:32		#4
Krishna Sandeep New Member Krishna Sandeep Join Date: Jun 2012 Posts: 12 Rep Power: 14	Thank u everyone I shall try using PIMPLE....