Question

Which of the following are characteristics of steady flow?

• A. Path
• B. Stream line
• C. Streak line

Hint:

In steady flow, streamlines, streak lines, and path lines coincide because the velocity at each point does not change over time. Always check the definition of steady flow when analyzing fluid dynamics problems.

Answer 1

The Correct Option is A

In steady flow, the velocity of the fluid at each point does not change with time. The three characteristics of steady flow are: (1) Path: The trajectory followed by a fluid particle over time. In steady flow, the path of a particle remains consistent over time. (2) Streamline: A line that is tangent to the velocity vector at every point in the fluid. It represents the path of the flow at a given moment in time, and in steady flow, streamlines remain fixed. (3) Streak line: A line that represents the path traced by a fluid particle over time. In steady flow, the streak lines coincide with the streamlines since the velocity does not change. Thus, the correct answer is that all three characteristics (Path, Stream line, Streak line) are valid in steady flow.