Question

In steady flow, pathline and stream lines are _____________

(a) different

(b) same

(c) 0

(d) slightly similar

This question was posed to me in homework.

The above asked question is from Uniform Flow in portion Inviscid & Incompressible Flow of Aerodynamics

Answer 1

The correct answer is (b) same

Explanation: A pathline is a path followed by a fluid flow particle. Whereas, streamline is a point in the fluid flow at which if a tangent is drawn, it gives the direction of the fluid flow. But in a steady flow, the velocity remains constant throughout the flow, hence the pathline and streamline become the same.