5737Chemical EngineeringMedium
Pick out the wrong statement?
AThe shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonian fluids is (D/4L). Δp
BShear stress for Newtonian fluid is proportional to the rate of shear in the direction perpendicular to motion
CWith increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids
DIn the equation, T. gc = k. (du/dy)n the value of ‘n’ for pseudoplastic and Dilatant fluid are 1 respectively
Correct answer
C. With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids
Explanation
The correct answer is With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids.