What Is Turbulence? Turbulent Fluid Dynamics are Everywhere

Turbulent fluid dynamics are literally all around us. This video describes the fundamental characteristics of turbulence with several examples from nature and from engineering. We discuss how turbulent fluids are unsteady, three-dimensional, mixing, and multiscale. We also describe how the Reynolds number in the Navier-Stokes equations controls this complexity.

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This video was produced at the University of Washington

[GabrieleNunnari]

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During my research (5 years) I always was trying to make a clear understanding of the concepts like:
1- Instabilities in fluid and
2-Transition from laminar to turbulence.

It seems to be an interesting topic if you provide us a few great videos.

Again, thank you, and keep up the good work!

[pawanghildiyal]

Very nicely explained with wonderful slides and pictures. I can see how much effort had been put in these slides. Absolutely wonderful

[pipertripp]

This looks really cool. I really enjoyed the qualitative introduction. For those of us w/o the engineering/physics chops (yet), this is a daunting subject, so thanks for that. Hat tip for the use of "zed" early on.

[DerekWoolverton]

The Reynolds decomposition feels like the first step in breaking down the flow in a hierarchy of scales, similar to a Fourier transform. The challenge is finding the basis of the scales where it would further simplify the analysis.

[chandsureja]

the work that you are doing is amazing. I am actually binge-watching your videos like it's Netflix. But I have a small request it would be amazing to make a whole course for fluid mechanics which dives deep into all the mathematics and underlying theorems. It is really amazing. Thank you very much.

[DiegoAndrade]

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[呷宇呷宇]

I must say that these lectures have always been fantastic, thanks

[bobtarmac]

Thank for you for all the wonderful work you put into this video. Helped me understand the curiosities I am working on.

[BardBreakfast]

I'm a geology major and i needed to learn about this to study sedimentology and it was so helpful!! thank you!!

[oguzo.]

Love that. Your way of describing things is very inspiring for me. I hope this turbulence series will last long.

[vindhiman]

Truly Love your videos. I think apart from the four characteristics you mentioned, dissipation is another vital one.

[x.ruizdealegria]

It's outstanding this content is free! This is one of the best explanation about turbulence I've been explained

[nicoleminotti]

This is such a well-organized intelligible lecture. Thank you for spending the effort and time to make these lectures public for us!

[Tourimatsa]

If I have to study the whole turbulent dynamics to get the piece of information I need that is going to take a lifetime. Many people do that and just do nothing else. The most important is to connect the dots of every aspect of nature in one smooth flow of energy not wasting time.

[vuthylim]

I hope you and your family are doing well. I would like to say the explanation of this video was wonderful. Thank so much you Sir.

[hchoudhary]

Excited to which complete series on turbulence

[rodbarker]

Richardson (a major figure in aerodynamics) famously said...."Big whirls have little whirls that feed on their velocity, and little whirls have lesser whirls and so on to viscosity."
Now that viscosity can be manifestly reduced by injecting ionized air into the flow field

[JoelRosenfeld]

Great introduction here! I love the examples, the simulations, and the connections to cinema.