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

Cdrag multiple tracking

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 11, 2010, 08:26
Default Cdrag multiple tracking
  #1
Senior Member
 
Vesselin Krastev
Join Date: Jan 2010
Location: University of Tor Vergata, Rome
Posts: 361
Rep Power: 10
vkrastev is on a distinguished road
Hi all,
I'm performing some aerodynamic calculations and it will be very useful to me to understand if by using the forceCoeffs function there is the possibility to track the drag coefficients of more than one patch at the same time (I mean during the same run). To be as much clear as I can, what I want to do is not to evaluate the Cdrag of an object composed by different patches, but namely the drag contribution of every single patch.

Thank you in advance

V.
vkrastev is offline   Reply With Quote

Old   October 12, 2010, 04:40
Default
  #2
Senior Member
 
Vesselin Krastev
Join Date: Jan 2010
Location: University of Tor Vergata, Rome
Posts: 361
Rep Power: 10
vkrastev is on a distinguished road
Any replies?
vkrastev is offline   Reply With Quote

Old   October 12, 2010, 23:30
Default
  #3
New Member
 
wei wu
Join Date: Mar 2009
Location: us
Posts: 14
Rep Power: 8
wei_wu is on a distinguished road
I'd like to know the answers also.
wei_wu is offline   Reply With Quote

Old   October 13, 2010, 15:46
Default
  #4
Senior Member
 
Join Date: Mar 2009
Posts: 225
Rep Power: 9
paka is on a distinguished road
Yes, it is mentioned in different posts. Search through the forum, I'm not sure I didn't use it for different patches, but I believe you just repeat the whole section where you call for force output, but you define multiple sections with different directory names. Something like:

name1
{
...
}

name2
{
...
}

I'm not sure, search, read, verify

Aloha,
K
paka is offline   Reply With Quote

Old   October 15, 2010, 08:41
Default
  #5
Senior Member
 
Vesselin Krastev
Join Date: Jan 2010
Location: University of Tor Vergata, Rome
Posts: 361
Rep Power: 10
vkrastev is on a distinguished road
Quote:
Originally Posted by paka View Post
Yes, it is mentioned in different posts. Search through the forum, I'm not sure I didn't use it for different patches, but I believe you just repeat the whole section where you call for force output, but you define multiple sections with different directory names. Something like:

name1
{
...
}

name2
{
...
}

I'm not sure, search, read, verify

Aloha,
K
Yes, it's like Paka said. I've verified it on my own and it works: you just have to declare some different forceCoeffs-type functions into the controlDict (the name is not important, what is important is do declare them properly), each one referred to the patch of interest. By doing so, during the run time the code will store the force coefficients in different folders, named as the different functions are.

Regards

V.
vkrastev 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
OpenFOAM static build on Cray XT5 asaijo OpenFOAM Installation 9 April 6, 2011 12:21
Multiple domain/Multiple material problems... possible or not? Amiga500 OpenFOAM 1 April 14, 2010 15:32
Number density tracking rather than particle tracking Rebecca Main CFD Forum 2 April 23, 2009 12:52
High values of Cdrag DAK565656 Main CFD Forum 21 September 5, 2005 17:16
Particle Tracking Pravir Kumar Rai FLUENT 2 January 30, 2003 20:16


All times are GMT -4. The time now is 10:29.