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.

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).

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

Salam Farhad Golriz
 

Salam farhad!!!
Man bar roye proje fluent kar mikonam va hamin soal ra daram, mekhastam bebinam aya idea dar in zamine dari?
mamnoon!!

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,

Hi Farhad, I am working in the project fluent sfotware

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?
Thank you for your attention.

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

what's different between shear stress and excess shear stress in flow 3D output
 

Hello everyone
what's different between shear stress and excess shear stress in flow 3D output?