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

how to get forces on Iso-Clip Surfaces and How to get forces in cylindrical coordinat

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

Like Tree2Likes
  • 2 Post By jotter

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 18, 2011, 06:24
Default how to get forces on Iso-Clip Surfaces and How to get forces in cylindrical coordinat
  #1
New Member
 
CFD Xue
Join Date: Jun 2010
Posts: 12
Rep Power: 15
CFD XUE is on a distinguished road
1. On wall, we can get forces by using Report-->Force option. How to get forces on Iso-Clip Surfaces? By using Surface-->Iso-Clip, I generate four surfaces on a wall. Now I want to get forces on these four surfaces but these four surfaces are not present in Wall Zone column in Report-->Force option. So please inform that how to get forces on Iso-Clip Surfaces?

2. In Fluent, we can write force on a wall by using Report--> Force option. It writes force in Cartesian (x, y, or z) coordinates. I want to write force in cylindrical coordinates (axial, radial and tangential direction). How to get forces in cylindrical coordinates?
CFD XUE is offline   Reply With Quote

Old   March 17, 2015, 10:13
Default
  #2
New Member
 
John
Join Date: Dec 2012
Posts: 8
Rep Power: 13
jotter is on a distinguished road
Hello,

I have searched the forum and I have not found an answer to this question. (http://www.cfd-online.com/Forums/flu...o-surface.html is another unanswered thread for this).

I am using fluent v15.0

Esstenially I have a wall surface which I want to know the force exerted on, however I would now like to split this surface at the maximum radial co-ordinate and have two surfaces. A forebody and afterbody.

So I have completed an iso-clip of the wall surface which has worked correctly. But I cannot evaulate a force integral on my new clipped surface.

Does anybody have any ideas?

Many Thanks

John
jotter is offline   Reply With Quote

Old   March 18, 2015, 04:01
Default
  #3
New Member
 
谭健
Join Date: May 2014
Location: Gothenburg,Sweden
Posts: 4
Rep Power: 11
JianT88 is on a distinguished road
If you can export the contour on a wall you can post-process the data with more freedom.
JianT88 is offline   Reply With Quote

Old   March 18, 2015, 04:28
Default
  #4
New Member
 
John
Join Date: Dec 2012
Posts: 8
Rep Power: 13
jotter is on a distinguished road
Do you mean exporting the raw pressure and shear stress data from the wall? And then performing the integration manually?

I found a way of calculating the force on the clipped surface directly in fluent. I set up a surface integral of shear stress and pressure along my clipped surface, which is what fluent does in the force integral anyway. It is not ideal as it is easy to make mistakes with projected areas, but it works.
metmet and JianT88 like this.
jotter is offline   Reply With Quote

Reply

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



All times are GMT -4. The time now is 07:10.