CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   FLOW-3D (https://www.cfd-online.com/Forums/flow-3d/)
-   -   Shear Stress Calculation in the flow. (https://www.cfd-online.com/Forums/flow-3d/79047-shear-stress-calculation-flow.html)

 auburnuser August 10, 2010 16:34

Shear Stress Calculation in the flow.

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.

 JBurnham August 25, 2010 18:35

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).

 MuxaB August 26, 2010 23:58

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.

 golriz November 11, 2011 16:05

Hi everybody,
Is there any way to calculate the shear stress in flow-3d ver. 9.3.2?

 raha.a May 21, 2012 02:50

Quote:
 Originally Posted by MuxaB (Post 272984) 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

 mziarp April 18, 2013 02:42

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 (Post 331764) Hi everybody, Is there any way to calculate the shear stress in flow-3d ver. 9.3.2?

 golriz April 18, 2013 15:04

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?

 mziarp April 20, 2013 00:36

Hi Farhad, I am working in the project fluent sfotware

 golriz April 20, 2013 07:14

You can easily see wall shear stress by this way,
Fluent ---> Graphics and Animations ---> Contours ---> Wall Fluxes

Hello Flow3D users,
How exactly Flow3D calculates the "Excess Shear Stress" output?