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

Time-averaged result

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 20, 2012, 02:53
Question Time-averaged result in transient FLUENT simulation
  #1
New Member
 
linlong
Join Date: Feb 2012
Posts: 4
Rep Power: 14
lgas222 is on a distinguished road
Hi,

I'm working on FLUENT with transient mode. And I hope to get the time-averaged contours of the results.

I have tried with paraview. It seems like paraview can only read data with a time step; however, a set of time series transient data can not be imported to the paraview.

Does anyone know how to post process it? Thanks a lot.

Last edited by lgas222; February 20, 2012 at 03:13. Reason: explain more
lgas222 is offline   Reply With Quote

Old   February 20, 2012, 08:20
Default Re
  #2
Member
 
Domenico
Join Date: Sep 2011
Location: Atlanta
Posts: 39
Rep Power: 14
doronzo is on a distinguished road
hi

not totally sure, but if you are using for example RANS, then the results are already time-averaged, i.e. they are averaged on your time step, whatever time level you are looking at.

regards
doronzo is offline   Reply With Quote

Old   February 20, 2012, 08:38
Default
  #3
New Member
 
linlong
Join Date: Feb 2012
Posts: 4
Rep Power: 14
lgas222 is on a distinguished road
Quote:
Originally Posted by doronzo View Post
hi

not totally sure, but if you are using for example RANS, then the results are already time-averaged, i.e. they are averaged on your time step, whatever time level you are looking at.

regards

Thanks.

I use k-epsilon viscous model. Do you know how can I get the time-averaged contour between, eg. 1-100s, with paraview or tecplot? As I knew from my colleague, we can use matlab to deal with it. But I haven't tried that.
lgas222 is offline   Reply With Quote

Old   February 20, 2012, 11:39
Default Re
  #4
Member
 
Domenico
Join Date: Sep 2011
Location: Atlanta
Posts: 39
Rep Power: 14
doronzo is on a distinguished road
hi

what i know is that if you are simulating the RANS, so not LES/DNS, then your solution is already integrated over the time step you are using.

aside from the numerical aspects your time step can lead, it should be longer than the typical duration of fluctuating components, but it should also allow for the possibility of variations in mean quantities to describe unsteady conditions in the mean fluid motion, thus the time step cannot be too long.

this means it depends on the problem you are solving, but however i don't know how to average in ''other'' times outside Fluent; i know it is possible with Tecplot in a relatively easy way, but honestly i don't know how

regards
doronzo is offline   Reply With Quote

Reply

Tags
fluent, post process, time averaged, transient

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Multiple floating objects CKH OpenFOAM Running, Solving & CFD 14 February 20, 2019 09:08
Reg - Log result hariya03 OpenFOAM 2 February 15, 2011 05:32
Transient post-processing, Time averaged pressure work Turbomachine CFX 1 January 3, 2011 17:01
how do I export the time series of the result? empirer2002 CFX 3 April 16, 2008 07:33
IcoFoam parallel woes msrinath80 OpenFOAM Running, Solving & CFD 9 July 22, 2007 02:58


All times are GMT -4. The time now is 22:09.