CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > FLOW-3D

Shear Stress Calculation in the flow.

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 10, 2010, 17:34
Default Shear Stress Calculation in the flow.
  #1
New Member
 
Janesh
Join Date: Aug 2010
Posts: 2
Rep Power: 0
auburnuser is on a distinguished road
Dear Flow3d users,

I have some question about the shear stress calculation in the closed channel flow.

I have a rectangular channel section and the water flows from left to right. I have used the periodic boundary conditions.

I want to know the shear stress on the walls. In the software itself I didn't find any option to extract the shear stress.

Is there any option to calculate shear stress, then would you good people please let me know ?

If there is not any option, then I think we have a equation of shear stress as follows:
Tou (shear stress) = neu * (du/dy)
neu= dynamic viscosity.

HOw do we use this equation with the output from Flow3d to calculate shear stress ?

Any help is highly appreciated. THank you.
auburnuser is offline   Reply With Quote

Old   August 25, 2010, 19:35
Default
  #2
Senior Member
 
Jeff Burnham
Join Date: Apr 2010
Posts: 204
Rep Power: 16
JBurnham is on a distinguished road
Beginning in v9.4 of the software shear stress is an available output (as 'Excess Shear Stress', for which the threshold can be zero if total shear is desired).
JBurnham is offline   Reply With Quote

Old   August 27, 2010, 00:58
Default
  #3
Senior Member
 
michael barkhudarov
Join Date: Mar 2009
Location: Sante Fe, New Mexico, USA
Posts: 336
Rep Power: 17
MuxaB is on a distinguished road
You can also output the total (integrated) shear force on the channel if you ask for this output option in the input file. This option is available for each geometry component.
MuxaB is offline   Reply With Quote

Old   November 11, 2011, 16:05
Default
  #4
Member
 
farhad
Join Date: Mar 2010
Location: Tehran
Posts: 32
Rep Power: 16
golriz is on a distinguished road
Hi everybody,
Is there any way to calculate the shear stress in flow-3d ver. 9.3.2?
golriz is offline   Reply With Quote

Old   May 21, 2012, 03:50
Default
  #5
New Member
 
asadi
Join Date: Dec 2011
Posts: 5
Rep Power: 14
raha.a is on a distinguished road
Quote:
Originally Posted by MuxaB View Post
You can also output the total (integrated) shear force on the channel if you ask for this output option in the input file. This option is available for each geometry component.
hi
how do i calculate the shear stress in flow3d v9.3?
thx
raha.a is offline   Reply With Quote

Old   April 18, 2013, 03:42
Default Salam Farhad Golriz
  #6
New Member
 
Maziar
Join Date: Jan 2012
Posts: 6
Rep Power: 14
mziarp is on a distinguished road
Salam farhad!!!
Man bar roye proje fluent kar mikonam va hamin soal ra daram, mekhastam bebinam aya idea dar in zamine dari?
mamnoon!!



Quote:
Originally Posted by golriz View Post
Hi everybody,
Is there any way to calculate the shear stress in flow-3d ver. 9.3.2?
mziarp is offline   Reply With Quote

Old   April 18, 2013, 16:04
Default
  #7
Member
 
farhad
Join Date: Mar 2010
Location: Tehran
Posts: 32
Rep Power: 16
golriz is on a distinguished road
Salam Maziar,
I do not understand what do you want to do?
Do you want to model the shear stress in FLUENT? or Flow 3D?
Farhad,
golriz is offline   Reply With Quote

Old   April 20, 2013, 01:36
Default
  #8
New Member
 
Maziar
Join Date: Jan 2012
Posts: 6
Rep Power: 14
mziarp is on a distinguished road
Hi Farhad, I am working in the project fluent sfotware
mziarp is offline   Reply With Quote

Old   April 20, 2013, 08:14
Default
  #9
Member
 
farhad
Join Date: Mar 2010
Location: Tehran
Posts: 32
Rep Power: 16
golriz is on a distinguished road
You can easily see wall shear stress by this way,
Fluent ---> Graphics and Animations ---> Contours ---> Wall Fluxes
golriz is offline   Reply With Quote

Old   December 15, 2014, 20:02
Default
  #10
New Member
 
Join Date: Dec 2014
Posts: 3
Rep Power: 11
claudiadalmora is on a distinguished road
Hello Flow3D users,
How exactly Flow3D calculates the "Excess Shear Stress" output?
Thank you for your attention.
claudiadalmora is offline   Reply With Quote

Old   February 2, 2015, 11:35
Default
  #11
Member
 
liping_he
Join Date: Feb 2011
Posts: 36
Rep Power: 15
liping_he is on a distinguished road
HI JBurnham

I am using flow3d 9.3 to simulate the hydro-turbine. I want to calculate the component fluid torque and force about fixed axis (a vector or X,Y,Z axis). Could you give me help to obtain these vaule?thanks very much!


best regards
liping
liping_he is offline   Reply With Quote

Old   May 12, 2018, 14:49
Default what's different between shear stress and excess shear stress in flow 3D output
  #12
New Member
 
Mostafa Neshastehgar
Join Date: Nov 2014
Posts: 1
Rep Power: 0
TMU1 is on a distinguished road
Hello everyone
what's different between shear stress and excess shear stress in flow 3D output?
TMU1 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Shear stress from velocity profile baranii2000 COMSOL 4 November 11, 2015 05:08
interFoam - stratified flow - problem with shear stress at interface AnjaMiehe OpenFOAM Running, Solving & CFD 8 June 14, 2010 07:49
Wall shear stress distributions en51nm STAR-CD 2 January 28, 2010 05:42
Total shear rate in a 3 dimensional flow Bo Busk Jensen Main CFD Forum 3 May 23, 2003 16:26
Flux depending on wall shear stress in Fluent 5.2 Andreas Borg FLUENT 0 June 7, 2000 07:27


All times are GMT -4. The time now is 07:26.