CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Pre-Processing

Drag coefficent and Drag force

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

LinkBack Thread Tools Search this Thread Display Modes
Old   March 8, 2013, 16:55
Default Drag coefficent and Drag force
New Member
Join Date: Mar 2013
Posts: 2
Rep Power: 0
DanoGC is on a distinguished road
I'm trying to calculate the drag coefficent and drag force on a sphere with diameter 500mm (I'm using mm as measure). My fluid is water and the Reynold coefficient is Re=0.025 and the velocity is 5.0E-5 because I need a laminar behaviour in my simulation and I used the code to put in the controlDict file. The problem that I have is the results of the drag coefficent is very big, like 1.3E+11. I'm don't know what is happenig because I have reviewed all data.

If somebody can help me, it would be terrific.
DanoGC is offline   Reply With Quote

Old   March 22, 2013, 04:28
Join Date: Dec 2011
Location: Russia
Posts: 97
Blog Entries: 41
Rep Power: 14
skeptik is on a distinguished road
If you have physically reasonable pressure distribution, just check Aref and Lref in forceCoeffs section of your controlDict.

Or show controlDict here at least.
practice makes perfect
skeptik is offline   Reply With Quote


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
Airfoil negative drag coefficent James Forrest Main CFD Forum 9 September 5, 2022 10:30
question on drag coefficent hippolyte Main CFD Forum 0 April 19, 2011 00:37
convergence criteria by lift and drag coefficent xtof CFX 3 March 18, 2011 14:38
Coefficent of Drag jd210 OpenFOAM Running, Solving & CFD 0 March 8, 2011 19:34
about the drag coefficient maximus Main CFD Forum 7 April 18, 2005 19:00

All times are GMT -4. The time now is 06:14.