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- What is the mystery of turbulence? - Physics Stack Exchange
What is called turbulence are precisely those states where the flow is irregular However as this transition to turbulence depends on the constituents and parameters of the system and leads to very different states, there exists sofar no general physical theory of turbulence
- What are the length and time scales in turbulence?
I haven't been able to understand what are does someone mean by length and time scales, while talking about turbulence Can someone explain it?
- Taylors hypothesis in turbulence - Physics Stack Exchange
The "Taylor Hypothesis" is founded on the idea that the changes observed in any given measured in the propagate at speeds much much less than the bulk flow speed of the solar wind (well, this has been applied in other regions of space than just the solar wind, but it's most commonly assumed there) We start with the nonrelativistic relation (i e , assume V c 1) given by: where is the observed
- Why is turbulence dissipation $\epsilon$ defined this way?
This term is turbulence kinetic energy dissipation rate $\epsilon$, which represents the rate at which Kolmogorov eddies energy is converted back into the flow’s internal energy I understand the physic of energy cascade and turbulence dissipation, but I don't understand how did we relate the above definition to turbulence dissipation?
- What does “eddy” mean in turbulence? - Physics Stack Exchange
a newbie in turbulence study, very confused about the concept of eddy, I feel the word quot;eddy quot; having two meanings in fluid-mechanics maybe more and i'm not sure if i understand correctly
- fluid dynamics - What is enstrophy? - Physics Stack Exchange
Note that the vortex stretching -> turbulence cascade connection in the enstrophy -> vortex stretching -> turbulence cascade is a jump I made, not the text Not sure how valid it is, iirc it's been shown that vortex stretching is not the only dominant term in the turbulence cascade
- turbulence - From Kolmogorov (1941) to $k^ {-5 3}$ - Physics Stack Exchange
I think the dimensional analysis @2b-t linked to is the way it is derived The K41 paper outlines the hypotheses of turbulence, and then dimensional analysis is what determines the exponent That's consistent with how the K41 paper determines all the other relationships they lay out -- it's all based on dimensional analysis definitions Not sure you'll find "better" demonstrations than
- how to determine if a vortex is laminar or turbulent
How do I determine if the vortex so formed is laminar or turbulent? The flow in your case will have some 'lamina' features and be fully turbulent To establish the dominating factor in this case should be obvious It is the bulk motion of the flow that drives the type of vortex you describe, not turbulence What paremeter will indiacate this?
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