Question

Define stream line, streak line, path line and give their differences

Answer 1

Streamline- Two streamlines never intersect each other and the tangent at any point on the streamline gives the direction of the velocity vector

Streakline-It is the locus of the temporary locations of all the particles that have passed through a fixed point in the flow ofield at any instanat of time

Pathline- Pathlines are the locus of particles with identity

Pathlines can intersect each other and can make closed loops.