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Results tagged with turbulence
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user 6982
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.
2
votes
Free falling water from tap turns laminar to turbulent
The flow does not become turbulent. It is the interplay between gravity and surface tension that causes the break-up into droplets.
Due to gravity, the fluid will accelerate. We know from mass conserv …
- 5,070
9
votes
Accepted
How to estimate the Kolmogorov length scale
The size of the Kolmogorov scale is not universal, it is dependent on the flow phenomena you are looking at. I don't know the details for compressible flows, so I will give you some hints on incompres …
- 105
9
votes
Concept behind Reynolds number
Dimensionless numbers in fluid dynamics are always a ratio of two quantities. The expression that you share is only a results of that expression. The Reynolds number is defined as the ratio between in …
- 5,070
2
votes
Does steady flow imply laminar?
Yes, a steady flow is always laminar (but not conversely as you already understood). Turbulent flows are by definition time-dependent (and thus unsteady) flows and therefore not laminar.
Turbulent fl …
- 5,070
2
votes
Is the viscous sublayer size universal?
As far as I know, there are no exceptions of this law when increasing the Reynolds number. When decreasing the Reynolds number, at some point your boundary layer will not be turbulent, and thus be dif …
- 5,070
3
votes
Navier-Stokes - Complete set under turbulent eddy viscosity hypothesis
The reference that you show, makes it overly complicated to see the steps that are taken. In fluid dynamics, it is worth to familiarize yourself with index notation. You can reduced the three sets of …
- 5,070