Erratum to “Effect of Concentric Annular Gap Flow on Wall Shear Stress of Stationary Cylinder Pipe Vehicle under Different Reynolds Numbers”

الملخص EN

In the article titled “Effect of Concentric Annular Gap Flow on Wall Shear Stress of Stationary Cylinder Pipe Vehicle under Different Reynolds Numbers” [1], there was an error in equations (8) and (9).

The corrected equations are shown as follows:(8)Ff=μFn1=μG−Fc2,(9)Fτ=λc8ρva−vc2A′,where λc represents the flow resistance coefficient, which is related to the material of the inner wall of the pipe and the physical properties of the fluid; va represents the velocity of the annular gap flow; and vc represents the velocity of water in the pipe.

A′ represents the lateral area of the piped vehicle.