IGNOU BEY 3 2026 - Explain streamline, pathline, and streakline. Under what con

Question

Explain streamline, pathline, and streakline. Under what condition do theycoincide?

06 Mar 2026

Answer :

Word Count : 272

In fluid mechanics, streamline, pathline, and streakline are important concepts used to describe the motion of fluid particles under different observational conditions. A streamline is an imaginary curve that is tangent to the velocity vector of fluid flow at every point at a given instant. It represents the direction of fluid velocity at a particular moment in time. No two streamlines can intersect each other because that would imply two different velocities at the same point, which is physically impossible in steady conditions. A pathline is the actual trajectory followed by a single fluid particle over a period of time. It shows the real motion of an individual particle

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