Steamline, Pathline, Streakline

  • Thread starter harvhk852
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They are also identical in steady flows. In summary, they are identical in steady flows and they can be visualized as either streamlines, pathlines or streaklines depending on the scenario.
  • #1
harvhk852
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This topic is about streamlines, pathlines and streaklines. Please could you see if you could help me out, only if you answer one of the questions would be a great help. Thanks alot:smile:

1) When are these line identical??

2) Is the visualied line a streamline, pathline or a streakline in the following cases.

a) The stream plume released from a vent pipe at a power plant.

b) The vapour trail of a jet airplane.

c) The smoke released from a source upstrean of a model in a wind tunnel experiment. The wind tunnel flow is steady.

d) A nuetrally bupyant helium balloon carried in the wind.
 
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  • #2
They are identical in steady flows, i.e the velocity at a point does not change.
 
  • #3



1) These lines are identical when the flow is steady and the velocity at each point in the flow field is constant. This means that the lines will not change over time and all three lines will have the same shape and orientation.

2)
a) The visualized line would be a streakline. This is because the stream plume is continuously releasing fluid and the line shows the path of the particles that have passed through the same point in the flow field.

b) The visualized line would be a pathline. This is because the vapour trail is showing the actual path of the jet airplane, which is continuously moving and changing direction.

c) The visualized line would be a streamline. This is because the smoke released from the source is following the same direction and path as the flow in the wind tunnel, which is steady and constant.

d) The visualized line would be a pathline. This is because the balloon is being carried by the wind and the line shows the actual path that the balloon has traveled.
 

Related to Steamline, Pathline, Streakline

What is the difference between streamline, pathline, and streakline?

Streamline, pathline, and streakline are all terms used in fluid mechanics to describe the movement of a fluid. Streamline refers to an imaginary line that represents the direction of flow of a fluid at a given point. Pathline is the actual path that a fluid particle takes as it moves through a fluid. Streakline is the locus of all fluid particles that have passed through a particular point in a fluid at a given time.

How are streamline, pathline, and streakline related?

All three terms describe the movement of a fluid, but they differ in terms of the reference point used. Streamline is based on the direction of flow at a given point, pathline follows the actual path of a fluid particle, and streakline shows the path of all particles that have passed through a specific point at a specific time.

How do streamline, pathline, and streakline help in fluid mechanics?

These concepts are used to understand and analyze the complex movement of fluids in various systems. They can help in predicting the behavior of fluids and determining factors such as velocity and pressure at different points in the system.

Can streamline, pathline, and streakline be visualized?

Yes, these concepts can be visualized using various techniques such as flow visualization methods, including dye injection and particle tracing. These methods allow for the visualization of the movement of fluids in a system and can help in understanding the behavior of the fluid.

How are streamline, pathline, and streakline used in real-world applications?

These concepts are used in various industries, including aviation, automotive, and marine engineering, to design and optimize fluid systems. They are also used in weather forecasting and environmental studies to understand the movement of air and water currents.

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