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

Wall Shear in User Fortran

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

LinkBack Thread Tools Search this Thread Display Modes
Old   March 26, 2008, 05:29
Default Wall Shear in User Fortran
Posts: n/a
I am trying to determine the wall shear from a junction box routine. I have a square building which I have divided into sections and used a step function to sort out the respective pressure and wall shear on the respective section. See examples below.

p2 = p * step(((2*dz)-z)/1[m])*step((z-((1)*dz))/1[m])

sx2 = wall shear x * step(((2*dz)-z)/1[m])*step((z-((1)*dz))/1[m])

I then define the same number of additional variables and assign the corresponding variable the value of the expression.

In Fortran I call the variables at each timestep in a transient run by USER_GET_GVAR. In the examples below, VARNAME_F is the respective pressure for the section in question and VARNAME_SX corresponds to a wall shear x variable as defined above.



I use the same procedure for the y and z directions. But when I try to run the simulation the solver stops after the first timestep when runnning the junction box routine and express the following error message:

Error in subroutine cal_TAUWALL_TURB :

Called for invalid locale: VERTICES

GETVAR originally called by subroutine CAL_BCP_Aver_IP

+--------------------------------------------------------------------+ | Writing crash recovery file | +--------------------------------------------------------------------+

+--------------------------------------------------------------------+ | ERROR #001100279 has occurred in subroutine ErrAction.

| | Message:

| | Stopped in routine GV_ERROR

| |

If I exclude the wall shear terms in my fortran routine there is no problem and the simulation keeps on running.

Does anyone have any idea as to where I could have made some mistakes or what needs to be set in CFX-Pre to make the USER_GET_GVAR functions for the wall shear work?



  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
Natural convection in a closed domain STILL NEEDING help! Yr0gErG FLUENT 4 December 2, 2019 00:04
Comparison between C/C++ and Fortran? rick Main CFD Forum 45 September 6, 2011 00:52
Wall shear stress distributions en51nm STAR-CD 2 January 28, 2010 04:42
Post processing - Wall shear stress Carlo Siemens 1 March 4, 2009 07:35
User fortran routines, DEBUG AND OUTPUT Bloshchitsyn Vladimir CFX 5 October 29, 2007 01:31

All times are GMT -4. The time now is 20:12.