Steamline, Pathline, Streakline

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SUMMARY

Streamlines, pathlines, and streaklines are crucial concepts in fluid dynamics that describe the motion of particles in a flow field. They are identical in steady flow conditions where the velocity at a point remains constant. In the examples provided, the stream plume from a power plant vent is a streamline, the vapor trail of a jet airplane is a streakline, the smoke in a steady wind tunnel is a streamline, and the helium balloon behaves as a pathline in steady flow. Understanding these distinctions is essential for analyzing fluid behavior in various applications.

PREREQUISITES
  • Fluid dynamics fundamentals
  • Understanding of steady vs. unsteady flow
  • Knowledge of particle tracing techniques
  • Familiarity with visualization methods in fluid mechanics
NEXT STEPS
  • Research the differences between streamlines, pathlines, and streaklines in detail
  • Explore visualization techniques for fluid flow, such as computational fluid dynamics (CFD) software
  • Study the implications of steady and unsteady flows in real-world applications
  • Learn about particle tracing methods in fluid dynamics simulations
USEFUL FOR

Students and professionals in fluid dynamics, engineers working with flow visualization, and researchers analyzing fluid behavior in various environments will benefit from this discussion.

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 a lot: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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They are identical in steady flows, i.e the velocity at a point does not change.
 

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