Civil Engineering - GATE Exam Questions - Discussion
Discussion Forum : GATE Exam Questions - Section 6 (Q.No. 35)
35.
The flow of water (mass density = 1000 kg/m3 and kinematic viscosity = 10-6 m2/s) in a commercial pipe, having equivalent roughness ks as 0.12 mm, yields an average shear stress at the pipe boundary = 600 N/m2. The value of ks/δ' (δ' being the thickness of laminar sub-layer) for this pipe is
Discussion:
2 comments Page 1 of 1.
Suresh said:
8 years ago
Anyone explain it.
Ajay said:
7 years ago
Laminar sub-layer thick = 11.6 * kinematic viscosity/shear velocity.
Shear velocity =(shear stress /density of fluid)^0.5.
Shear velocity =(shear stress /density of fluid)^0.5.
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