solving algorithm in CFX

feizaghaee · May 29, 2010, 09:01

does anybody know which algorithm cfx uses to solve a problem?(simple, simpelc, piso ...)
and how can i use QUICK scheme?

ghorrocks · May 29, 2010, 18:55

It is all explained in the documentation. It uses a coupled solver. It does not use the uncoupled methods you describe.

As for QUICK, you need to set that up with CEL.

feizaghaee · May 30, 2010, 03:45

thanks a lot my friend

cfdman · May 31, 2010, 02:36

Hello Glen,

Which solver algorithms, schemes available in CFX? Could you give some details about this?

Thanks

ghorrocks · May 31, 2010, 03:02

DOCUMENTATION. Read it. If you want more details followup the references in the doco.

Mina_Shahi · January 13, 2012, 12:49

Quote:

Originally Posted by ghorrocks

DOCUMENTATION. Read it. If you want more details followup the references in the doco.

Hi Glenn

I am confused i read CFX theory manual but i didn't get the point and the references are too old and it is not available for me.
I also read your advise in other pages in this Froum, what i understood is that CFX doesn't use SIMPLE- SIMPLEC- SIMPLER or PISO- but it does pressure velocity coupling, it uses Rhie Chow for interpolating. Is it true???

i found this document when i was searching on the google appd.pdf if you go to page D-19 you can see that it is talking about SIMPLEC which made me even more confused, can you please take a look at this document and let me know what you think?

Thank you in advance

Far · January 14, 2012, 00:31

Quote:

it uses Rhie Chow for interpolating. Is it true???

Yes, It is true.

ghorrocks · January 14, 2012, 06:59

The document you found is using CFX4. This was the previous CFD code, and was superseded by CFX5. CFX5 is a coupled solver and does not use SIMPLE (or its variants). All versions of CFX after 5 use the coupled solver.

Mina_Shahi · January 16, 2012, 06:32

Quote:

Originally Posted by ghorrocks

The document you found is using CFX4. This was the previous CFD code, and was superseded by CFX5. CFX5 is a coupled solver and does not use SIMPLE (or its variants). All versions of CFX after 5 use the coupled solver.

Thank you for replying me, because this document made me so confused,

May 29, 2010, 09:01	solving algorithm in CFX	#1
feizaghaee Senior Member moein Join Date: Dec 2009 Posts: 132 Rep Power: 16	does anybody know which algorithm cfx uses to solve a problem?(simple, simpelc, piso ...) and how can i use QUICK scheme?

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May 29, 2010, 18:55		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	It is all explained in the documentation. It uses a coupled solver. It does not use the uncoupled methods you describe. As for QUICK, you need to set that up with CEL.

May 30, 2010, 03:45		#3
feizaghaee Senior Member moein Join Date: Dec 2009 Posts: 132 Rep Power: 16	thanks a lot my friend

May 31, 2010, 02:36		#4
cfdman New Member Arda Ersan Join Date: Aug 2009 Posts: 13 Rep Power: 17	Hello Glen, Which solver algorithms, schemes available in CFX? Could you give some details about this? Thanks

May 31, 2010, 03:02		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	DOCUMENTATION. Read it. If you want more details followup the references in the doco.

January 14, 2012, 06:59		#8
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	The document you found is using CFX4. This was the previous CFD code, and was superseded by CFX5. CFX5 is a coupled solver and does not use SIMPLE (or its variants). All versions of CFX after 5 use the coupled solver.