SIMPLEC vs. PISO

March 3, 2000, 06:31

Hello,

I'm running a steady state incompressible turbulent flow problem and decided to try PISO instead of SIMPLEC and discovered that the oscillations in the residuals were reduced. Is there anybody that can support the conclusion that PISO might be more suitable for this kind of problem? (PISO was originally developed for transient compressible flow)

Regards

Andreas

prashant gupta · October 9, 2009, 09:02

for turbulent flows dont use simplec , use simple or coupled, u may get faster convergence it that

Lance · October 9, 2009, 10:11

Way to go, posting in a 9½ year old thread....

ghorrocks · October 10, 2009, 06:56

Especially one which has not applied to CFX for over 5 years. This post must be referring to CFX4 as CFX5/11/12 does not have SIMPLEC or PISO.

prashant gupta · October 12, 2009, 02:49

oops, i dint saw the date, sorry, hhahahaha,

well till 9 i think there is simple and piso

March 3, 2000, 06:31	SIMPLEC vs. PISO	#1
Andreas Abdon Guest Posts: n/a	Hello, I'm running a steady state incompressible turbulent flow problem and decided to try PISO instead of SIMPLEC and discovered that the oscillations in the residuals were reduced. Is there anybody that can support the conclusion that PISO might be more suitable for this kind of problem? (PISO was originally developed for transient compressible flow) Regards Andreas

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October 9, 2009, 09:02		#2
prashant gupta New Member Prashant Gupta Join Date: Sep 2009 Location: IIT Kanpur Posts: 8 Rep Power: 17	for turbulent flows dont use simplec , use simple or coupled, u may get faster convergence it that

October 9, 2009, 10:11		#3
Lance Senior Member Lance Join Date: Mar 2009 Posts: 669 Rep Power: 22	Way to go, posting in a 9½ year old thread....

October 10, 2009, 06:56		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	Especially one which has not applied to CFX for over 5 years. This post must be referring to CFX4 as CFX5/11/12 does not have SIMPLEC or PISO.

October 12, 2009, 02:49		#5
prashant gupta New Member Prashant Gupta Join Date: Sep 2009 Location: IIT Kanpur Posts: 8 Rep Power: 17	oops, i dint saw the date, sorry, hhahahaha, well till 9 i think there is simple and piso