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

probe wallShearStress

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 18, 2016, 09:51
Default probe wallShearStress
  #1
baS
New Member
 
Join Date: May 2016
Posts: 2
Rep Power: 0
baS is on a distinguished road
Hi Foamers,

I want to calculate the friction velocity u* = sqrt(tau_w/rho) on several points on a plate with openFoam 4.x. For this reason I want to calculate the shear stress and the density at the wall.
The output should be in the "postProcess"-format (coordinate / value) and not in the time-Folder.

I tried the following functions so far:

1. rhoSimpleFoam -postProcess -func wallShearStress

-> calculates wallShearStress in the time folder and the min/max-Values in the postProcess-Folder. Do I need an extra wallShearStress-file for defining the probe-locations?

2.
rhoSimpleFoam -postProcess -func probes

with the "probes"-file:

type probes;
setFormat raw;
fields
(
wallShearStress
);

probeLocations(
( 0 0 0)
);

-> no files are written in postProcessing-Folder (but it works for fields(U,k))

Any solutions?

Thanks for your Help!
Sebastian
baS is offline   Reply With Quote

Old   August 7, 2018, 14:25
Default
  #2
gu1
Senior Member
 
Guilherme
Join Date: Apr 2017
Posts: 180
Rep Power: 6
gu1 is on a distinguished road
Quote:
Originally Posted by baS View Post
Hi Foamers,

I want to calculate the friction velocity u* = sqrt(tau_w/rho) on several points on a plate with openFoam 4.x. For this reason I want to calculate the shear stress and the density at the wall.
The output should be in the "postProcess"-format (coordinate / value) and not in the time-Folder.

I tried the following functions so far:

1. rhoSimpleFoam -postProcess -func wallShearStress

-> calculates wallShearStress in the time folder and the min/max-Values in the postProcess-Folder. Do I need an extra wallShearStress-file for defining the probe-locations?

2.
rhoSimpleFoam -postProcess -func probes

with the "probes"-file:

type probes;
setFormat raw;
fields
(
wallShearStress
);

probeLocations(
( 0 0 0)
);

-> no files are written in postProcessing-Folder (but it works for fields(U,k))

Any solutions?

Thanks for your Help!
Sebastian
Did you find the solution? I need to monitor the wallShearStress in the wall throughout the simulation to contextualize the convergence of a turbulent case.
gu1 is offline   Reply With Quote

Reply

Tags
postprocess, wallshearstress

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
Using Probe for part of a patch ndr OpenFOAM Running, Solving & CFD 7 April 4, 2019 06:26
Empty Probe File - Probes not working rvmedina20 OpenFOAM Post-Processing 3 May 11, 2016 19:36
why does 'sample' do this? wallShearStress question CHARLES OpenFOAM Post-Processing 0 August 7, 2013 19:30
wallShearStress VS wallGradU bigrock OpenFOAM Post-Processing 0 July 2, 2013 05:54
Line Probe Smoothing badger1 STAR-CCM+ 1 May 21, 2013 22:36


All times are GMT -4. The time now is 16:12.