(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Oil of Density 888kg/m^3 and viscosity 0.8Pa*s is flowing in a horizontal pipe of diameter 0.15m. The local flow velocity at the centerline is 10m/s. find the shear stress exerted by the oil on the wall of the pipe.

2. Relevant equations

tau = -eta*(dv/dy)

3. The attempt at a solution

= -0.8*(10/0.075) = 106.7 Pa

but the given solution is 213Pa, exactly twice my answer, what am I doing wrong? thanks

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# Homework Help: Shear Stress due to Laminar flow

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