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

Collecting many time-velocity data in FLUENT

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 7, 2011, 05:17
Default Collecting many time-velocity data in FLUENT
  #1
Member
 
Join Date: Sep 2009
Posts: 69
Rep Power: 7
DarrenC is on a distinguished road
Hello there,

I have a simulation whereby Im trying to extract approximately 5000 velocity points at different location of the flow domain at different time steps.

I initially tried to define rakes and use surface monitors to display and write the velocities at each time step to a file. But this method only seems to average out the velocity over the points of the rake and display a single velocity at each time step.

Then I tried defining approximately 5000 individual points but the HPC ran out of memory!

Does anyone know how to solve this problem I have. I might be using define monitors wrongly but Ive experiemented with different settings and it hasnt worked.

Hope someone can help me out here

Cheers
Darren
DarrenC is offline   Reply With Quote

Old   March 7, 2011, 09:05
Default
  #2
Senior Member
 
Amir's Avatar
 
Amir
Join Date: May 2009
Location: Shiraz, Iran
Posts: 739
Blog Entries: 1
Rep Power: 14
Amir is on a distinguished road
Hi Darren,
the other choice is using a UDF that execute every time step and write your desired data to a specified file with pre-defined precision.
Amir is offline   Reply With Quote

Old   March 7, 2011, 10:36
Default
  #3
Senior Member
 
xrs333
Join Date: Aug 2010
Posts: 125
Rep Power: 7
xrs333 is on a distinguished road
File −> Export −> During Calculation −> Solution Data…
xrs333 is offline   Reply With Quote

Old   March 8, 2011, 00:11
Default
  #4
Member
 
Join Date: Sep 2009
Posts: 69
Rep Power: 7
DarrenC is on a distinguished road
Hello xrs,

I have tried your method and it seems to be working in my PC. I define a plane and save the points in the plane in ascii format. However when I scripted the TUI to run the same case in my HPC, the drop down menu of transient-export dosent have the ascii format. My PC and HPC are running exactly the same version 12.1 however the HPC is running a UNIX copy.

Do you know what might be the problem?

Cheers
Darren
DarrenC is offline   Reply With Quote

Old   March 8, 2011, 03:12
Default
  #5
Member
 
Join Date: Sep 2009
Posts: 69
Rep Power: 7
DarrenC is on a distinguished road
I just realised that you cant export files in ASCII format if you are using a parallel version of FLUENT!!!. Surely such an easy task can be achieved without using a UDF?
DarrenC is offline   Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20
Data conversion at each time step for specific fields melanie OpenFOAM Post-Processing 10 September 29, 2009 17:34
Settling Velocity - FLUENT Discrete Phase Model Lily FLUENT 2 March 6, 2002 22:44
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13
unsteady calcs in FLUENT Sanjay Padhiar Main CFD Forum 1 March 31, 1999 12:32


All times are GMT -4. The time now is 07:31.