Turbulence and why eddy breakups take place?

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SUMMARY

The discussion focuses on the mechanisms behind energy cascade in turbulent flow, specifically addressing why large eddies break up and transfer energy to smaller eddies. Participants highlight the importance of understanding shear forces and angular momentum in this context. The Richardson energy cascade is mentioned as a theoretical framework for analyzing these phenomena. Key questions include the nature of eddy breakup mechanisms and the distinction between macro and micro kinetic energy.

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  • Turbulent flow dynamics
  • Richardson energy cascade theory
  • Shear forces in fluid mechanics
  • Angular momentum principles
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Students and researchers in fluid dynamics, physicists studying turbulence, and engineers focusing on energy transfer mechanisms in turbulent flows.

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How to explain energy cascade mechanisms? Why eddy breakups take place?
 
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Vashliana said:
How to explain energy cascade mechanisms? Why eddy breakups take place?
Welcome to PF.

Can you post some links to the reading you have been doing about this? That will get you a lot better responses than just asking very broad questions without many explicity definitions and questions. Thanks.
 
hello again
Simply I studied about Turbulent flow and the Richardson energy cascade theoretically, but from the view point of physics i don't know how and why large eddy transfers energy to the smaller one?
thanks
 
hello

i have some questions about energy cascade in turbulent flow. I know that large eddies transfer energy to smaller one and ..., my first question is why large scales should breakup?
second : how these eddies transfer energy and what is the eddy breakup mechanism ?
and finally: we have kinetic energy in both bulk and molecular scale, what is the difference between these two kinetic energy (macro and micro)?
thanks a lot
 
Vashliana said:
but from the view point of physics i don't know how and why large eddy transfers energy to the smaller one?
Think about shear forces and angular momentum, and size. Is it easier to turn (roll) a large object or smaller object?
 

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