polyflow

hamid1 · May 9, 2011, 13:43

Hy guys

what are the limitations for simulation through Polyflow?
i mainly willing to know if it is possible to simulate through polyflow in all ranges of Reynolds number? (or it is appropriate just for low reynolds number)

Many thank

Amir · May 10, 2011, 08:26

Hi hamid,
As you know, it solves equations with finite element method and it seems that its worse than finite volume in high Re. No.

hamid1 · May 10, 2011, 11:35

Hi Amir

How come?, would u explain a bit more, and besides,roughly speaking is there any limitation for the reynolds number as role of thumb for simulating through polyflow?

Amir · May 10, 2011, 11:58

Hey,
as you know, finite element method is recommended for problems that convection term is not dominated; although, there are new algorithm to improve that, but this method is usually used for solid medias. undoubtedly, the finite volume is more reliable for fluids especially in high Re No.
I don't have any rules of thumb for that; I faced such problems few months ago. I am using OpenFOAM in linux to get rid of them.

hamid1 · May 10, 2011, 13:10

Hi Amir

so as i understand anyway polyflow is good for very low reynolds number ,any simulation concerning a relatively higher reynolds number (which normally happens in fluids) is not feasible to be done through polyflow, by the way, openfoam is based on f.e or f.v ?

thank u
Hamid

Amir · May 11, 2011, 15:06

Hi,
I guess that polyflow can also be helpful for moderate Re No.
OpenFOAM is based on finite volume but as it's an open source code, you can also implement some F.E. algorithms like DQ on that. it's so flexible!

regards,

Amir

May 9, 2011, 13:43	polyflow	#1
hamid1 Senior Member hamid Join Date: Nov 2010 Posts: 185 Rep Power: 15	Hy guys what are the limitations for simulation through Polyflow? i mainly willing to know if it is possible to simulate through polyflow in all ranges of Reynolds number? (or it is appropriate just for low reynolds number) Many thank

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
polyflow error	duton	FLUENT	2	June 21, 2021 05:47
Polyflow problem	Fani	FLUENT	1	March 5, 2015 00:14
polyflow, fluent, cfx	hamid1	FLUENT	0	April 4, 2011 04:17
Polyflow helps	natuan74	FLUENT	0	February 12, 2010 00:26
Polyflow VS C-mold	krishna	FLUENT	0	June 17, 2004 02:28

May 10, 2011, 08:26		#2
Amir Senior Member Amir Join Date: May 2009 Location: Montreal, QC Posts: 735 Blog Entries: 1 Rep Power: 22	Hi hamid, As you know, it solves equations with finite element method and it seems that its worse than finite volume in high Re. No.

May 10, 2011, 11:35		#3
hamid1 Senior Member hamid Join Date: Nov 2010 Posts: 185 Rep Power: 15	Hi Amir How come?, would u explain a bit more, and besides,roughly speaking is there any limitation for the reynolds number as role of thumb for simulating through polyflow?

May 10, 2011, 11:58		#4
Amir Senior Member Amir Join Date: May 2009 Location: Montreal, QC Posts: 735 Blog Entries: 1 Rep Power: 22	Hey, as you know, finite element method is recommended for problems that convection term is not dominated; although, there are new algorithm to improve that, but this method is usually used for solid medias. undoubtedly, the finite volume is more reliable for fluids especially in high Re No. I don't have any rules of thumb for that; I faced such problems few months ago. I am using OpenFOAM in linux to get rid of them.

May 10, 2011, 13:10		#5
hamid1 Senior Member hamid Join Date: Nov 2010 Posts: 185 Rep Power: 15	Hi Amir so as i understand anyway polyflow is good for very low reynolds number ,any simulation concerning a relatively higher reynolds number (which normally happens in fluids) is not feasible to be done through polyflow, by the way, openfoam is based on f.e or f.v ? thank u Hamid

May 11, 2011, 15:06		#6
Amir Senior Member Amir Join Date: May 2009 Location: Montreal, QC Posts: 735 Blog Entries: 1 Rep Power: 22	Hi, I guess that polyflow can also be helpful for moderate Re No. OpenFOAM is based on finite volume but as it's an open source code, you can also implement some F.E. algorithms like DQ on that. it's so flexible! regards, Amir