|
[Sponsors] |
FLUENT Periodic Boundary Condition SOLVED + TUTORIAL |
![]() |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
![]() |
![]() |
#21 |
New Member
Xiaohua Li
Join Date: Nov 2013
Posts: 15
Rep Power: 12 ![]() |
Thank you very much. I just face the problem. I hope it can help .
|
|
![]() |
![]() |
![]() |
![]() |
#22 |
New Member
moon
Join Date: Feb 2012
Posts: 26
Rep Power: 14 ![]() |
Is there a way to implement periodic boundary condition with UDF ? thx
|
|
![]() |
![]() |
![]() |
![]() |
#23 |
Member
|
Hi all, I am simulating an axial fan in fluent with inlet and outlet duct for finding the fan curve, I have a confusion regarding the interfaces types should I have to make the interfaces with periodic boundary condition and if yes then what should I consider rotational or translational and how can I calculate the angle if I am considering rotational under the periodic boundary tab.
Thanks in advance Hashim |
|
![]() |
![]() |
![]() |
![]() |
#24 |
New Member
Musty
Join Date: Oct 2013
Posts: 8
Rep Power: 12 ![]() |
This was Awesome!!! I just started to understand periodic boundary conditions and in my first shot I succeeded with help of this topic, Thank you very much Peter!
Additional Question: Only a small question, how about boundary condition? I mean for hydraulic diameter, should I assume whole diameter or applying 4*Area/Pwet for 30° slice? |
|
![]() |
![]() |
![]() |
![]() |
#25 | |
Senior Member
Rick
Join Date: Oct 2010
Posts: 1,016
Rep Power: 26 ![]() |
Quote:
![]() |
||
![]() |
![]() |
![]() |
![]() |
#26 |
New Member
Musty
Join Date: Oct 2013
Posts: 8
Rep Power: 12 ![]() |
Cheers, thats what I've done though
![]() |
|
![]() |
![]() |
![]() |
![]() |
#27 | |
New Member
Musty
Join Date: Oct 2013
Posts: 8
Rep Power: 12 ![]() |
Quote:
I dont know if there is easier way (to cancel previous selections and apply always new) |
||
![]() |
![]() |
![]() |
![]() |
#28 |
New Member
MOHD ZEESHAN FARIDI
Join Date: Nov 2014
Location: SILCHAR, ASSAM
Posts: 1
Rep Power: 0 ![]() |
hi, peter and cfd fellows
i hv encountered a problem in making periodic boundaries in fluent i.e translation deltas: 0.000000 0.000000 0.003630 zone 27: matched 259 out of 307 faces. zone 26: matched 259 out of 312 faces. Error: Failed to make zones periodic. Error Object: #f kidly give me somepath for this thanks hope 4 ur answer ![]() |
|
![]() |
![]() |
![]() |
![]() |
#29 |
Member
Nazim
Join Date: Oct 2013
Posts: 93
Rep Power: 12 ![]() |
Dear Peter I have one very important question. How to define periodicity For Rotor and Stator in ICEM CFD when there are different Number of Blades for Rotor and Different Number of Blades for Stator, since the angle will be different for Each of Them.
Thank You |
|
![]() |
![]() |
![]() |
![]() |
#30 |
New Member
Islam Abdelghafar
Join Date: Oct 2014
Posts: 13
Rep Power: 11 ![]() |
Hi Peter,
how can i determine the proper principal axis and the orientation about the principal axis ? |
|
![]() |
![]() |
![]() |
![]() |
#31 |
New Member
Monib ur Rehman
Join Date: Jul 2015
Posts: 1
Rep Power: 0 ![]() |
Hi every one.
I am working on CFD using Fluent. i have stuck in the middle. Could anyone please tell me how do i apply periodic boundary condition on walls of sub channel of nuclear reactor? When i apply, i get divergence errors.Please help Thanks in advance |
|
![]() |
![]() |
![]() |
![]() |
#32 | |
New Member
Antoine Aad
Join Date: Apr 2011
Posts: 10
Rep Power: 15 ![]() |
Quote:
|
||
![]() |
![]() |
![]() |
![]() |
#33 |
New Member
Senthilkumar
Join Date: Oct 2012
Posts: 29
Rep Power: 13 ![]() |
Hi all,
For ICEM users this following link is helpful for doing periodic Boundary condition https://www.youtube.com/watch?v=HYJcXt0SdMA |
|
![]() |
![]() |
![]() |
![]() |
#34 |
New Member
Jittanakatti
Join Date: Nov 2015
Location: Bangalore
Posts: 4
Rep Power: 10 ![]() |
In addition you can also get the periodicity in FLUENT by just making some setting in the Display menu
Go to.... Display – Views – Periodic Repeats (define) – translation/rotational Achieve your desired periodic contours! Thank you, Jittanakatti |
|
![]() |
![]() |
![]() |
![]() |
#35 |
Member
vlg
Join Date: Jul 2011
Location: My home :)
Posts: 81
Rep Power: 18 ![]() |
If you choose Cylindrical coordinate system it should not be yellow, and would work, but it would create mesh as for Rotational Periodic (the same mesh would be obtained with the rotation). If you need Translational Periodic, try using Model -> Symmetry -> Symmetry Region with Linear Periodic type instead. The mesh would be copied by translation, not rotation, which suits for Translational Periodic B.C.
|
|
![]() |
![]() |
![]() |
![]() |
#36 | |
Member
|
Quote:
|
||
![]() |
![]() |
![]() |
![]() |
#37 | |
Member
vlg
Join Date: Jul 2011
Location: My home :)
Posts: 81
Rep Power: 18 ![]() |
Quote:
Superficial velocity is a velocity that gives the same mass flow rate at any reactor cross-section (or volumetric flow rate, we do not care about density is varying or not - superficial velocity is engineering value based on the mean values). Superficial velocity is just Q/A, i.e. volumetric flow rate / cross-section. As you have circular cross-section for reactor and inlet, the area A is PI*D^2/4. Q is fixed (to hold continuity principle). If you have superficial velocity = 0.0016 for reactor (r-r) cross-section, you have to convert it 0.0016*(PI * Dr-r^2 / 4)/(PI * Dinlet^2 / 4) = 0.0016*Dr-r^2/Dinlet^2. Both D values should be put in the same units! If you have superficial velocity = 0.0016 for inlet, no conversion is needed. |
||
![]() |
![]() |
![]() |
![]() |
#38 | |
Member
|
Quote:
First of all sorry to start off topic.. I tried to create new post but unsuccessful. Because in china english website is not easy to open. . . Second.. your answer is quite good. My problem is solved because of your guidance . thank you.. |
||
![]() |
![]() |
![]() |
![]() |
#39 |
New Member
Nabeel Khaleel
Join Date: Jun 2016
Posts: 15
Rep Power: 10 ![]() |
Hi everyone
Is it possible to specify more than one periodic boundary condition in FLUENT? |
|
![]() |
![]() |
![]() |
![]() |
#40 |
New Member
Bhaskar
Join Date: Feb 2015
Posts: 7
Rep Power: 11 ![]() |
Yes. Just create different faces. There shouldn't be overlap.
|
|
![]() |
![]() |
![]() |
Tags |
fluent 13.0, how to, periodic boundary, tutorial |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Wind turbine simulation | Saturn | CFX | 60 | July 17, 2024 05:45 |
Symmetry and Periodic boundary conditions | CFD_Fluent_User | FLUENT | 1 | October 16, 2014 02:18 |
External Radiation Boundary Condition (Two sided wall), Grid Interface | CFD XUE | FLUENT | 0 | July 8, 2010 06:49 |
vorticity boundary condition | bearcharge | Main CFD Forum | 0 | May 14, 2010 11:32 |
Periodic boundary condition & Unsteady flow | Somchai | FLUENT | 2 | March 28, 2006 08:51 |