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What is the shear rate at the pipe wall, in case of laminar flow of Newtonion fluids in a pipe of diameter 'D' & length 'L' incurring a pressure drop 'Δp' with average velocity 'Vavg'? | |
A. | D Δp/8L [Wrong Answer] |
B. | D Δp/4L [Wrong Answer] |
C. | 8 . Vavg/D [Correct Answer] |
D. | 4 . Vavg/D [Wrong Answer] |