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

How to interpret Forces.dat

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 9, 2011, 03:33
Default How to interpret Forces.dat
  #1
New Member
 
Carla
Join Date: May 2011
Posts: 1
Rep Power: 0
stufo is on a distinguished road
Hi everyone,

I'm working on analyzing the forces which occur on an object standing in a current.
Therefore I changed my controlDict to get the Forces.dat. This files includes lots of numbers and I was wondering if someone could help me interpreting them?

# Time forces(pressure, viscous) moment(pressure, viscous)
3.0495074 (((0.32540538 -0.0078244099 -0.0007789344) (6.7894943 -0.052924547 -4.4842572)) ((0.0017677939 0.057113061 2.0317881e-05) (0.013213033 1.8573447 0.011517997)))
3.1582778 (((0.30514633 0.0027069022 -0.00077956082) (6.6367396 -0.10194604 -4.8944236)) ((-0.00085246205 0.06008529 1.8713607e-05) (0.0085110664 1.8092805 0.0097297487)))
....

After copying everything into Excel it looks a bit better:

# Time forces pressure viscous moment pressure viscous
3.0495074 0.32540538 -0.0078244099 -0.0007789344 6.7894943 -0.052924547 -4.4842572 0.0017677939 0.057113061 2.0317881e-05 0.013213033 1.8573447 0.011517997
3.1582778 0.30514633 0.0027069022 -0.00077956082 6.6367396 -0.10194604 -4.8944236 -0.00085246205 0.06008529 1.8713607e-05 0.0085110664 1.8092805 0.0097297487
3.2610254 0.38226206 -0.035842856 -0.00077955302 6.5805845 0.003704612 -4.8783838 0.005028375
0.070154761 2.312134e-05 -0.016757856 1.8145354 -0.0029691682
...


I think that the first column is the time and the second one the force on the defined point. Am I right?

Thanks for helping!
stufo is offline   Reply With Quote

Old   May 11, 2011, 08:56
Default
  #2
Member
 
Join Date: Nov 2009
Location: Germany
Posts: 96
Rep Power: 7
val46 is on a distinguished road
Quote:
Originally Posted by stufo View Post

I think that the first column is the time and the second one the force on the defined point. Am I right?
Hi,

a force is always acting on a face (not on a point).
But yes, you are right.
Values are in this order:
1. Time
2. pressure force (in X-direction)
3. pressure force (Y)
4. pressure force (Z)
5. viscous force (X)
6. viscous force (Y)
7. viscous force (Z)
8. moment from pressure force (in X-direction)
9. and so on...
__________________
"When I meet God, I am going to ask him two questions: Why relativity? And why turbulence? I really believe he will have an answer for the first." Werner Heisenberg
val46 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
How to plot a forces.dat file (with all the brackets)? CapSizer OpenFOAM Post-Processing 8 February 15, 2014 16:00
UDF interpret error with "C_CENTROID" Jinfeng Fluent UDF and Scheme Programming 3 September 26, 2009 17:40
interpret works fine but compile doesn't Jan Balemans FLUENT 0 March 14, 2008 10:41
Not able to interpret UDF Prasad FLUENT 1 August 15, 2007 08:44
why results different for Compile and Interpret? Joey FLUENT 3 April 6, 2004 17:19


All times are GMT -4. The time now is 08:48.