SSG model

feizaghaee · February 21, 2010, 07:22

i replied your email read it.

Tajnesaie · February 21, 2010, 13:47

Dear feizaghaee
thanks a lot

zandi · February 23, 2010, 05:33

Salam
Dear Mohanna
Please post your solution method after done it here, so we could learn it too
really appreciate your kindness and big effort

Tajnesaie · February 25, 2010, 03:01

Hi all
Mr.feizaghaee
I try to examin low number of meshing, and i found that the parameters such as "mass flow" in it, isnt conestant in several section unlike the simulation with great number of meshing.However i know this number of meshing isnt correct,too.

feizaghaee · February 25, 2010, 06:40

how did you decrease your mesh. you shouldn't decrease the mesh normal to the main flow.

Tajnesaie · February 25, 2010, 10:19

I work in workbench for meshing

zandi · February 26, 2010, 08:15

Quote:

Originally Posted by Tajnesaie

I work in workbench for meshing

Dear
you just can control mesh in all directions in independent form(refine one side of grid) with structured mesh, i think. so this problem

Quote:

shouldn't decrease the mesh normal to the main flow

can't be solved in Workbench; as it just do unstructured meshing in cfx mesh(again as I think!!)

Tajnesaie · March 24, 2010, 07:46

Hi
I could use ssg model in cfx12! but now it does not converge even after 2000 iteration!!!
What do I do?

Please help me.

feizaghaee · March 24, 2010, 08:24

how many mesh do you use? what's your time scale?

ghorrocks · March 24, 2010, 17:45

Quote:

I could use ssg model in cfx12! but now it does not converge even after 2000 iteration!!!

I assume you are running V12.1? Then look at the release notes for V12.1 and see what is relevant to you which changed. They tweak the numerics all the time and maybe one of those tweaks is causing the problem. In the release notes they usually describe a way of reverting back to the original behaviour so this should allow you to pinpoint the problem.

Tajnesaie · March 26, 2010, 01:15

Hi all

Quote:

Originally Posted by feizaghaee

how many mesh do you use? what's your time scale?

I send your mail 2 file, please see them.

Quote:

I assume you are running V12.1? Then look at the release notes for V12.1 and see what is relevant to you which changed. They tweak the numerics all the time and maybe one of those tweaks is causing the problem. In the release notes they usually describe a way of reverting back to the original behaviour so this should allow you to pinpoint the problem.

thanks ghorrocks, yes I'm running V12.1. your scope is I peruse the conditions with changing the parameters basis on these notes? At all is it necessary to recieve the convergence? and how mutch it does effective in my results?

ghorrocks · March 26, 2010, 06:06

Well, if you don't try then you won't know if one of the changes in V12.1 is causing the problem! How much do you want to know? If you don't care then don't bother doing it.

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February 21, 2010, 07:22		#21
feizaghaee Senior Member moein Join Date: Dec 2009 Posts: 132 Rep Power: 17	i replied your email read it.

February 21, 2010, 13:47		#22
Tajnesaie New Member Join Date: Jan 2010 Posts: 27 Rep Power: 16	Dear feizaghaee thanks a lot

February 23, 2010, 05:33		#23
zandi Senior Member Fatema Zandi Goharrizi Join Date: Mar 2009 Posts: 158 Rep Power: 17	Salam Dear Mohanna Please post your solution method after done it here, so we could learn it too really appreciate your kindness and big effort

February 25, 2010, 03:01		#24
Tajnesaie New Member Join Date: Jan 2010 Posts: 27 Rep Power: 16	Hi all Mr.feizaghaee I try to examin low number of meshing, and i found that the parameters such as "mass flow" in it, isnt conestant in several section unlike the simulation with great number of meshing.However i know this number of meshing isnt correct,too.

February 25, 2010, 06:40		#25
feizaghaee Senior Member moein Join Date: Dec 2009 Posts: 132 Rep Power: 17	how did you decrease your mesh. you shouldn't decrease the mesh normal to the main flow.

February 25, 2010, 10:19		#26
Tajnesaie New Member Join Date: Jan 2010 Posts: 27 Rep Power: 16	I work in workbench for meshing

March 24, 2010, 07:46		#28
Tajnesaie New Member Join Date: Jan 2010 Posts: 27 Rep Power: 16	Hi I could use ssg model in cfx12! but now it does not converge even after 2000 iteration!!! What do I do? Please help me.

March 24, 2010, 08:24		#29
feizaghaee Senior Member moein Join Date: Dec 2009 Posts: 132 Rep Power: 17	how many mesh do you use? what's your time scale?

March 26, 2010, 06:06		#32
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	Well, if you don't try then you won't know if one of the changes in V12.1 is causing the problem! How much do you want to know? If you don't care then don't bother doing it.