Turbulence and why eddy breakups take place?

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Energy cascade mechanisms in turbulent flow involve the transfer of energy from larger eddies to smaller ones, primarily driven by shear forces and angular momentum. Large eddies break up due to instabilities and interactions with smaller scales, facilitating this energy transfer. The breakup mechanism is influenced by the dynamics of fluid motion and the inherent turbulence characteristics. Additionally, kinetic energy exists at both macro (bulk flow) and micro (molecular) scales, with the former relating to the overall movement of fluid and the latter to individual particle motion. Understanding these concepts is crucial for studying turbulence and its effects in various physical systems.
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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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