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

Forces viscous calculation in VWT with OpenFOAM 15x

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 28, 2008, 09:39
Default Hi, I am trying to update my s
  #1
Member
 
Terry Barnaby
Join Date: Mar 2009
Location: Beam Ltd, UK
Posts: 44
Rep Power: 8
terrybarnaby is on a distinguished road
Hi, I am trying to update my simple VWT simulation from OpenFOAM 1.4.1 to 1.5.x. All appears reasonable except for the Forces viscous calculation made in simpleFoam using the forces function.

If my object is close to one of the walls (the road surface), the viscous force calculation result builds up over each simpleFoam time iteration, it does not appear to converge. The pressure force seems Ok. This did not happen in OpenFOAM 1.4.1 with the liftDrag utility.
With a simple cube, close to the "road", I am getting a final result, after 80 iterations, of:
forces output:
forces(pressure, viscous)((137.014 -5.47483e-06 137.545) (1850.53 1.1884e-05 16.0829))
moment(pressure, viscous)((-4.61107e-05 315.43 8.11586e-06) (1.12126e-06 40.5567 0.000137856))


I expect there is an issue with my case setup, I wonder if anyone could run an eye over my case and see what I am doing wrong ?

vwtTest9.tar.gz
terrybarnaby 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
Calculation of pressure forces in Fluent Maharba FLUENT 2 June 29, 2007 01:14
forces calculation Chien CFX 10 June 29, 2005 09:25
Pressure/viscous forces Nicolas FLUENT 0 June 19, 2003 13:14
viscous-pressure forces nico FLUENT 0 June 9, 2003 14:41
Calculation of forces Michal Marcinkowski Main CFD Forum 2 January 18, 2001 05:37


All times are GMT -4. The time now is 07:35.