Question

Seeta used a closed curve as her start point, it will result in the ___________

(a) plane

(b) stream surface

(c) stream line

(d) stream plane

This question was addressed to me during an online interview.

Enquiry is from Pathlines, Streamlines, Streaklines topic in portion Aerodynamics – Fundamental Principles and Equations of Aerodynamics

Answer 1

Correct choice is (b) stream surface

For explanation I would say: If a curve, line or closed curve is used as a start point then the streamlines so obtained are called a stream surface. In this case, Stream function comes into the picture which defines the scalar function of these streamlines.