The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is_____________________? August 27, 2021March 10, 2019 by admin The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is_____________________? A. 0.5 B. 1 C. 2 D. 0.66