Poiseuille's law for flow of a fluid through a tube relates flow rate, drop of pressure over the length of the tube, velocity of the fluid, and radius of the tube. In which of the following situations would there be no pressure drop?
A)if flow rate is constant
B)if viscosity is zero (ideal fluid)
C)in the case of laminar flow
D)if the velocity of the fluid is constant

Question

Quizplus · Accepted Answer

Poiseuille's law indicates that the pressure drop across a tube is directly proportional to the viscosity of the fluid. If the viscosity is zero, indicating an ideal fluid with no internal friction, there would be no pressure drop across the tube.

Poiseuille's Law for Flow of a Fluid Through a Tube