Question

Ram was on the bank of the river and was observing the flow of river. After sometime he got an idea and he started imagining certain points in the fluid and when he drew tangent to those points, he got direction of the flow. These lines are called as _____________

(a) Streakline

(b) Pathline

(c) Streamline

(d) Velocity vector

This question was addressed to me in an international level competition.

I'd like to ask this question from Pathlines, Streamlines, Streaklines topic in division Aerodynamics – Fundamental Principles and Equations of Aerodynamics

Answer 1

The correct answer is (c) Streamline

Easy explanation: Streamlines are the lines in fluid domain. When tangents are drawn from these lines, it gives the direction of velocity of the fluid particle. Hence, when Ram started imagining the points in the fluid and when he drew tangents from those points he could actually see the streamlines.