A regime of nonlinear viscous flow characterized by random, rotational motion with a wide range of length scales. Its study is critical to many fields, such as aerospace, atmospheric science, chemical engineering, and astrophysics.
Questions tagged [turbulence]
375 questions
10
votes
1 answer
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?
ab_11
- 103
5
votes
1 answer
From Kolmogorov (1941) to $k^{-5/3}$
I'm actually studying the famous paper of Kolmogorov (1941).
I am trying to derive the passages that deduces the fact that the Energy spectrum has a dependency $k^{-5/3}$. As far as I know, the dependency is demonstrated in the Obukhov 41 paper, but…
Ashish Bhigah
- 63
- 4
3
votes
1 answer
Problem about the hypothesis of turbulence from Kolmogorov (1941)
I'm actually studying the famous paper of Kolmogorov (1941) about incompressible turbulence (https://royalsocietypublishing.org/doi/abs/10.1098/rspa.1991.0075), but something struck me and I can't get my head around it.
Kolmogorov considers the…
Ixeday
- 31
2
votes
1 answer
Turbulent Energy Cascade - Scale Between the Integral and Kolmogorov Microscale
I have seen derivations of the the length scale, time scale and characteristic velocity of eddies in the inertial or large-scale range and in the diffusive or Kolmogorov scale range. I'm interested in the region in between, which Alistair Revell in…
rdemyan
- 71
1
vote
1 answer
How to calculate the time it takes for an integral eddy to be reduced to the Kolmogorov microscale
I would like to calculate the time it takes for the largest eddies to be reduced to a specific size eddy (for example, the Kolmogorov length scale, but I would like a general equation if possible). I'm confused by the term turnover time and how it…
rdemyan
- 71
1
vote
0 answers
Some question regarding turbulent eddies
There's several concepts I don't have a clear understanding of:
Plots of the turbulent energy cascade have a wave frequency as the axis - yet I see definitions of this "frequency" as the inverse of the eddy size. How does one get Hertz from this…
rdemyan
- 71
1
vote
0 answers
Modification of Mixing Length Damping Function to include Surface Roughness
Surface roughness has been incorporated into the van Driest damping function in studies by van Driest himself (1956) and more recently by Krogstad (1991) and Crimaldi et al (2006).
These models appear to be directed primarily at external boundary…
0
votes
0 answers
What scaling law does the two-dimensional isotropic turbulent energy spectrum satisfy as k tends to 0?
What scaling law does the two-dimensional isotropic turbulent energy spectrum satisfy as k tends to 0? Can you recommend some references? Thanks a lot!
0
votes
2 answers
When was any one liter of Long Island Sound water last in the Atlantic Ocean?
When was any one liter of Long Island Sound water last in the Atlantic Ocean?
The Sound for this model is:
Area: 1,268 mi²
Mean depth: 63 feet
Length 110 miles
Eastern opening into the Atlantic is 9 miles wide
An average tide of 6 feet, twice a…
Byterbit
- 1
-2
votes
2 answers
Turbulence and art
I read about turbulence a few days back.I saw a video showing the physics behind van gogh's starry night and physics.But I could not really understand the link between starry night and physics of turbulence.Please explain.
Harmonic
- 274