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January 30, 2012, 04:40 |
regarding periodic boundary condition
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#1 |
New Member
cfd
Join Date: May 2010
Posts: 7
Rep Power: 15 |
Hi
I want to give Periodic boundary condition on blades but it is giving error as below... /grid> modify-zones /grid/modify-zones> make-periodic Periodic zone [()] periodic_1 Shadow zone [()] periodic_2 Rotational periodic? (if no, translational) [yes] Create periodic zones? [yes] zone 12: matched 0 out of 676 faces. zone 13: matched 0 out of 676 faces. Error: Failed to make zones periodic. Error Object: #f /grid/modify-zones> What is the reason and how it can be corrected... Thanks in advance |
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February 25, 2012, 06:24 |
Re
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#2 |
Senior Member
mohamed khedr emam
Join Date: Oct 2011
Location: Egypt
Posts: 121
Rep Power: 14 |
I'm face the same problem
any help pls, |
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February 25, 2012, 09:10 |
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#3 |
Senior Member
shoeb khan
Join Date: Nov 2011
Posts: 179
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Hello
For periodic boundary conditions give the boundary conditions in gambit itself and then when you will export to fluent it be a periodic boundary condition second define it with any name and boundary types in gambit and then in fluent go to the boundary condition and change the boundary type to periodic thanks hope that will help you |
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February 25, 2012, 11:53 |
Re
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#4 |
Senior Member
mohamed khedr emam
Join Date: Oct 2011
Location: Egypt
Posts: 121
Rep Power: 14 |
Many thanks for replay BUT the problem is:
I'm using Ansys Workbench, so I'm used Ansys Mesher Not Gambit in my meshing my geometry Do you know who to solve this with Ansys? thanks again |
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February 25, 2012, 11:57 |
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#5 |
Senior Member
shoeb khan
Join Date: Nov 2011
Posts: 179
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yup i know
give any boundary condition name there is ansys mesher and then go to fluent in bounday condition change it to symmetry that's it |
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February 25, 2012, 12:06 |
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#6 |
Senior Member
mohamed khedr emam
Join Date: Oct 2011
Location: Egypt
Posts: 121
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You mean, I change the b.c to symmetry
THEN make it periodic by write the following command in fluent window:mesh -> modify-zones -> make-periodic |
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February 25, 2012, 12:09 |
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#7 |
Senior Member
shoeb khan
Join Date: Nov 2011
Posts: 179
Rep Power: 14 |
no
go to boundary conditions there change the boundary condition of those ares to symmetry. |
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February 25, 2012, 12:24 |
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#8 |
Senior Member
mohamed khedr emam
Join Date: Oct 2011
Location: Egypt
Posts: 121
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Sorry , i can't understand
I have 1/3 cylinder, the sided faces should be periodic. Is Symmetry equivalent to Periodic type!!! |
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February 25, 2012, 12:31 |
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#9 |
Senior Member
shoeb khan
Join Date: Nov 2011
Posts: 179
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send me the files i will try to tell you how to do
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February 25, 2012, 12:36 |
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#10 |
Senior Member
mohamed khedr emam
Join Date: Oct 2011
Location: Egypt
Posts: 121
Rep Power: 14 |
Thanks
Mail pls (the files are 11 MB) |
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February 25, 2012, 12:37 |
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#11 |
Senior Member
shoeb khan
Join Date: Nov 2011
Posts: 179
Rep Power: 14 |
send me geo with meshing in zip form in ansys 13 or 14 format
Last edited by shk12345; February 25, 2012 at 12:56. |
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February 25, 2012, 12:48 |
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#12 |
Super Moderator
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No symmetry is not equivalent to periodic. In figure you said the wall should be interior, rather it should be interface: one for internal fluid and one for external fluid.
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February 25, 2012, 13:07 |
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#13 |
Senior Member
mohamed khedr emam
Join Date: Oct 2011
Location: Egypt
Posts: 121
Rep Power: 14 |
Dear/Far
No it was an an old problem, i solved it sorry Now, i have to define the "periodic type zone" to the two faces as appear in this pic I'm made Match Face control in Ansys Mesher , Then i opened the fluent and write the following (mesh -> modify-zones -> make-periodic) After that fluent appear the first massage in this discussion !! |
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February 25, 2012, 14:17 |
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#14 |
Super Moderator
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you can try this solution and accuracy is as good as pure periodic planes. you can write them as interface and then go to interface panel and then define them as interface with periodic condition.
I shall look into this issue, as I used to get this message in starting of my career. |
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February 25, 2012, 14:27 |
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#15 |
Senior Member
mohamed khedr emam
Join Date: Oct 2011
Location: Egypt
Posts: 121
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Thanks ,Far
But interface solution cause dispersion to me ( i tried it before) if you find solution, tell me pls thanks again |
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February 25, 2012, 14:44 |
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#17 |
Senior Member
mohamed khedr emam
Join Date: Oct 2011
Location: Egypt
Posts: 121
Rep Power: 14 |
Thanks but
Case File is 9 Mb can't be attached |
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February 25, 2012, 14:47 |
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#18 |
Super Moderator
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use 4shared http://www.4shared.com/
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February 25, 2012, 15:00 |
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#19 |
Senior Member
mohamed khedr emam
Join Date: Oct 2011
Location: Egypt
Posts: 121
Rep Power: 14 |
http://www.4shared.com/file/Xf_fq-6s/FFF.html
Many thanks Far |
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March 30, 2012, 15:33 |
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#20 |
Member
Edu
Join Date: Sep 2009
Posts: 36
Rep Power: 16 |
Hi m5edr,
Did you solve the problem? I have the same problem and I don't know what causes or what can I do Thanks in advance! Regards |
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