What makes WIND so strong? (the $1M PRIZE)
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- Опубліковано 15 тра 2024
- Although no one has claimed the $1 million dollar prize for fully solving the Navier-Stokes equations, engineers do have effective ways for designing structures to resist wind--at least most of the time.
In this video we demonstrate the underlying concepts of what causes wind and how structures are designed to resist these forces; and, we display some of our favorite wind failures.
This video topic was chosen by you, our loyal subscriber, in a recent poll. We appreciate your participation, and hope you enjoy the content!
00:00 - $1 million dollar prize for Navier-Stokes
00:22 - building collapse
00:32 - roof uplift failure #1
00:40 - what causes wind?
01:20 - how fast are basic winds?
01:47 - roof uplift failure #2
01:54 - gust winds
02:00 - 2x speed = 4x pressure or force
02:30 - fastest wind ever (recorded)
02:47 - factors that amplify wind
03:12 - wind tunneling
03:22 - typical design wind pressures
03:39 - suction (negative) wind
04:00 - roof uplift failures #1 and #2
04:08 - instability under wind
04:22 - Tacoma Narrows
04:40 - Tacoma oscillation animation
04:55 - RIP Tubby
05:00 - Flutter vs Resonance
Thanks for watching--we make these videos for you, and if you enjoy them give us a like, subscribe, and let us know if you have any feedback!
References:
[1] Clay Mathematics Institute, Millenium Problems: Navier-Stokes Equation Official Problem Statement, 2000
[2] G. M. Masters, W. P. Ela, Environmental Engineering and Science 3rd ed., 2008
[3] J. B. D. Jaffres, Trove of Climate Data Awaiting Discovery, GHCN, 2018
[4] National Research Council of Canada, NBCC, 2015
[5] Y. A. Cengel, J. M. Cimbala, Fluid Mechanics - Fundamentals and Applications 4th ed., 2017
[6] World Meteorological Association, World Record Wind Gust, 2015
[7] G. Arioli, F. Gazzola, A New Mathematical Explanation of What Triggered the Catastrophic Torsional Mode of the Tacoma Narrows Bridge, Applied Mathematical Modelling, 2015
DISCLAIMER:
Content provided for entertainment purposes only. - Наука та технологія
Your statement about wind speed is wrong. The highest wind speed ever recorded on earth was over 300MPH in Moore, Oklahoma, during an EF5 tornado. On May 3, 1999.
The record excludes exceptional weather events like tornados. Otherwise the top 10 highest wind speeds would all be tornadoes.
Thanks for the comment kenny. We reported the highest wind speed based on the World Meteorological Association records, and they seem to have a fairly strict validation process for data reporting. You are right that tornados are though to be faster than cyclones, but they tend to destroy measurement equipment so many theoretical calculations and data of tornado speed end up unverified.
Cheers,
correct! thanks! @@m.streicher8286
'highest wind speed ever recorded on earth'? I'm willing to bet there are higher speeds that have been recorded in laboratory conditions on earth'....
But I'm not going to waste my time Googling it, unless somebody's willing to place a substantial amount of money on it?
Thank God for us pointlessly pedantic individuals ;)
Thanks for the imperial to metric conversion👍
400 km/hr is insane.
It's incorrect to reference the Imperial standard..... Since it's not used in the USA....
and good luck learning how to do conversions.....
@nc3826 yeah but most construction's still done in imperial so you have to use both in US and Canada. A lot of people still think in imperial in north america everyone gives their weight and height in pounds and feet-inches for example. Not saying it's logical just the way it is.
For the millionth time... just Google what the USA standard... For weights and measures is...... And it's not the imperial standard....Which you continue to incorrectly assume it is....
Yr videos are always interesting so much to learn even at my number
ha! thanks
Awesome video as always. Thanks for the work you put into these.
thanks for the comment! We certainly do spend a ton of time researching and animating
Awesome video! I didn't know wind had so much power🤯
Google wind turbines
@@nc3826 what's a wind turbine 😵
Excellent video!
Thank you very much!
Heavy timber frame construction. Boom. Just solved it.
only $1 million for solving that?