CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Turbulence Intensity in Post Processing

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 22, 2020, 08:27
Default Turbulence Intensity in Post Processing
  #1
New Member
 
Join Date: Apr 2019
Posts: 7
Rep Power: 7
trhn is on a distinguished road
Hi Everyone!

I need to see contours of turbulence intensity in post processing but it is not found in options. How can I see turbulence intensity?
trhn is offline   Reply With Quote

Old   May 22, 2020, 09:27
Default Turbulence Intensity
  #2
Senior Member
 
vinerm's Avatar
 
Vinerm
Join Date: Jun 2009
Location: Nederland
Posts: 2,946
Blog Entries: 1
Rep Power: 36
vinerm will become famous soon enough
Do you mean in CFDPost? It should be available, but if it is not you can create an expression using turbulent kinetic energy and velocity. Then, create a new variable and set it's value as the newly created expression because you can't directly plot contours using an expression.
__________________
Regards,
Vinerm

PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.
vinerm is offline   Reply With Quote

Old   May 31, 2020, 03:56
Default
  #3
New Member
 
Join Date: Apr 2019
Posts: 7
Rep Power: 7
trhn is on a distinguished road
Thanks Vinerm, but how can I write a function for turbulence intensity?
trhn is offline   Reply With Quote

Old   May 31, 2020, 06:50
Default Turbulence Intensity
  #4
Senior Member
 
vinerm's Avatar
 
Vinerm
Join Date: Jun 2009
Location: Nederland
Posts: 2,946
Blog Entries: 1
Rep Power: 36
vinerm will become famous soon enough
The intensity of turbulence is defined as the ratio of velocity fluctuation to the mean velocity. So, you create expression for u', velocity fluctuation, and then divide it by velocity magnitude. Look at the following

https://www.cfd-online.com/Wiki/Turbulence_intensity
__________________
Regards,
Vinerm

PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.
vinerm is offline   Reply With Quote

Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Utilities: post average turbulence fields and create turbulence fields for LES Hanzo OpenFOAM Running, Solving & CFD 10 August 18, 2017 19:33
Turbulence Intensity vs Reynolds number jason580315 ANSYS 3 March 1, 2017 06:21
Question on Turbulence Intensity Eric FLUENT 1 March 7, 2012 05:30
How to define the turbulence intensity and mixing length at an outlet (for k-eps)? david39 OpenFOAM Running, Solving & CFD 6 February 2, 2011 04:01
High Turbulence Intensity Problem bwg FLUENT 1 January 13, 2010 14:09


All times are GMT -4. The time now is 05:57.