Metallurgical Engineering > GATE 2026 > Fluid Mechanics
The equation below represents a steady-state laminar flow of a fluid through a horizontal tube:
η(1/r) d/dr(r dvz/dr) − dP/dz = 0
P is fluid pressure, η is dynamic viscosity, (r, z): coordinates of cylindrical polar system, and vz is axial velocity in z-direction.
Which one of the following statements related to the above case is NOT correct?
η(1/r) d/dr(r dvz/dr) − dP/dz = 0
P is fluid pressure, η is dynamic viscosity, (r, z): coordinates of cylindrical polar system, and vz is axial velocity in z-direction.
Correct : b
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