CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

wall shear stress

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

LinkBack Thread Tools Search this Thread Display Modes
Old   April 28, 2008, 13:51
Default wall shear stress
Posts: n/a
Dear all, I am writing a UDF to get the wss from fluent solver so that I can calculate the wss gradient and OSI. The problem is: I used this macro NV_V(wallshear, =, C_STORAGE_R_N3V(f,thread,SV_WALL_SHEAR)) to get the wall_shear_force, and then divided area.(wall_shear_force/area) to get the wss.

However, I found in the first/last 52 values is different from the values I got from fluent exported file. The magnitude of rest values are same but different direction(the value got from udf is positive while value from fluent is negative).

the mesh is 50X50X50 structured.

Does anyone know the reason?


  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
How to get the wall shear stress by UDF Chen Fangzhi FLUENT 3 November 11, 2014 06:03
wall shear stress brad Main CFD Forum 1 November 3, 2005 16:37
Shear stress at wall John FLUENT 0 September 21, 2005 08:27
UDF for wall shear stress Bastian FLUENT 0 July 21, 2004 04:52
wall shear stress lingo FLUENT 2 June 2, 2003 03:40

All times are GMT -4. The time now is 07:48.