|
[Sponsors] |
Ways to calculate the Oscillatory Shear Index |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
February 6, 2017, 10:12 |
Ways to calculate the Oscillatory Shear Index
|
#1 |
New Member
Sergio
Join Date: Feb 2017
Posts: 3
Rep Power: 9 |
Hello everyone! Im working on a simulation of a blood flow through an artery, and i am interested in calculating the OSI (Oscillatory Shear Index)
I have read other threads on this forum about the OSI, but i'm still not sure about how to proceed on this. Is it possible to calculate the OSI via custom field functions directly? In case that the answer is no, which method is recommendable? Exporting data to an external program such as Matlab and operate with it, or is it easier to do it using UDFs? Thank you very much! (PS: I apologize for my english grammatical errors) Last edited by Sergio_ST; February 8, 2017 at 05:21. |
|
February 22, 2017, 10:31 |
|
#2 |
New Member
Sergio
Join Date: Feb 2017
Posts: 3
Rep Power: 9 |
Sorry for replying my own question, but i get the solution for my problem and i want to share it with everyone who would need it some day.
You can calculate the OSI creating a custom field function like this: 0.5 * (1 - (sqrt (mean-x-wall-shear ^ 2 + mean-y-wall-shear ^ 2 + mean-z-wall-shear ^ 2) / mean-wall-shear)) Thanks! Last edited by Sergio_ST; March 20, 2017 at 11:14. |
|
August 9, 2017, 16:15 |
|
#3 |
New Member
Carlos Modesto
Join Date: Feb 2017
Posts: 7
Rep Power: 9 |
Hello Sergio.
Did you create the custom field function at cfd post, or it can be implemented at Fluent to obtain the OSI at each time-step. Thx in advance |
|
August 14, 2021, 06:03 |
|
#4 |
New Member
Suraj Shembekar
Join Date: Feb 2021
Location: India
Posts: 18
Rep Power: 5 |
Dear Sergio_ST,
I have tried the same but it shows the error: unit mismatch any suggestions? |
|
May 17, 2022, 03:54 |
Dear Sergio_ST,Is the custom field function created after calculation convergence?
|
#5 | |
New Member
zhangzijian
Join Date: May 2022
Posts: 1
Rep Power: 0 |
Quote:
|
||
August 25, 2022, 06:35 |
OSI calculation
|
#6 |
New Member
Md Asif Equbal
Join Date: Aug 2022
Location: India
Posts: 14
Rep Power: 4 |
While writing the expression provided above. I do not find mean in the custom field function. How can I enter that?
(Or) Can I write the same expression in CFD post directly for OSI calculation Hope anyone of you clarifies this. Thanks Last edited by mep20108@tezu.ac.in; August 25, 2022 at 07:48. |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
calculate y+ and u+ -how to get wall shear stress? | Ralf Schmidt | Main CFD Forum | 18 | September 17, 2019 03:23 |
[snappyHexMesh] snappyHexMesh and cyclic boundaries | Ruli | OpenFOAM Meshing & Mesh Conversion | 2 | December 9, 2013 06:51 |
Calculating average wall shear? | Joe | CFX | 3 | March 17, 2007 09:42 |
shear stress scalar definitions? | Novak Elliott | CFX | 0 | April 6, 2003 01:45 |
how do i calculate shear rate | joel | Main CFD Forum | 4 | September 18, 2002 05:31 |