What is the shear rate at the pipe wall, in case of laminar flow of Newtonian fluids in a pipe of diameter ‘D’ & length ‘L’ incurring a pressure drop ‘Δp’ with average velocity ‘Vavg’ ? | MCQ Hive

Chemical Engineering Fluid Mechanics for Chemical

Q What is the shear rate at the pipe wall, in case of laminar flow of Newtonian fluids in a pipe of diameter ‘D’ & length ‘L’ incurring a pressure drop ‘Δp’ with average velocity ‘Vavg’ ?

A A. D δp/8l
B B. D δp/4l
C C. 8 vavg/d
D D. 4 vavg/d

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