[chowdhury]

Hello Everyone,

I am trying to verify the reported wall shear stress of a model in Ansys Fluent. This two dimensional model uses standard k-e turbulent closure scheme with standard wall functions. The manual says that, it uses Launder and Spalding method. I tried to verify it with my result. However, the results do not match. Fluent results gives wall shear stress around 20.62 N/m2.
If I follow the process explained in the Fluent manual, it gives me around 8.95 N/m2.
Note that, If I use Log(base 10) instead of Log(base e) in the procedure, I can reproduce the same value around 20.62 N/m2. Now, I am thinking what can be the source of discrepancy. I would appreciate if anyone can suggest me regarding this issue.

FYI: The velocity in the first cell is 1.111 m/s, distance from the wall is 0.0008 m and kinetic energy at the point is 0.059828 m2/s2.
Note: I would like to mention that my first cell from the wall is in the log-law region. I have around 2-3 cells in the log-law region.

Regards,
Md Nasimul