Project ForgeFluid Mechanics
Flow Through Pipes
GATE 2017
Medium
Oil flows steadily through a pipe (radius 1.25×10⁻²m, length 10m), pressure drop 500 Pa. The shear stress at the pipe wall, rounded to 2 decimal places, is
0.31 Pa(± 0.02 accepted)
Explanation
τw=ΔP·R/(2L)=500×0.0125/(2×10)=0.3125 Pa.
Source: GATE CH 2017 (2017)
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