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Edward Zaron
Приєднався 21 лис 2016
Forced Two-Dimensional Turbulence in a Doubly-Periodic Domain
Two parts:
(1) Forcing at intermediate scale
(2) Forcing at small scale
Music: "Wet Hands," by C418, c418.org
(1) Forcing at intermediate scale
(2) Forcing at small scale
Music: "Wet Hands," by C418, c418.org
Переглядів: 310
Відео
Decaying Two-Dimensional Turbulence in a Square Domain
Переглядів 1525 років тому
Music: "Dry Hands" by C418, c418.org
Shallow Water Turbulence: non-divergent forcing at small scales
Переглядів 625 років тому
Shallow Water Turbulence: non-divergent forcing at small scales
Shallow Water Turbulence: non-divergent forcing at intermediate scales
Переглядів 835 років тому
Shallow Water Turbulence: non-divergent forcing at intermediate scales
Geostrophic Adjustment in Shallow Water
Переглядів 4735 років тому
This animation shows what geostrophic adjustment looks like in the shallow water equations. Gravity waves from the initial height anomaly quickly steepen into sharp wave fronts. The waves barely interact with the potential vorticity; they just jiggle it a little. Parameters in the simulation correspond to mid-latitude equivalent barotropic dynamics for the first internal mode.
An Animation of Ocean Tides
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TPXO9.1 barotropic tide model by Egbert and Erofeeva: volkov.oce.orst.edu/tides/ HRET8.1 baroclinic tide model: ezaron.hopto.org Music "Sweden" from Minecraft Alpha by C418: c418.org This video shows an animation of the combined twice-per-day, M2, and once-per-day, K1, tides.
Internal Wave Tank Demonstration
Переглядів 71 тис.7 років тому
A short demonstration of internal waves using a tank filled with mineral oil and water. Rocking the tank simulates the tide-generating force acting on the world oceans. Internal waves are generated at submerged topography. Credits: Ed Zaron concept and apparatus Adam Raitano filming, editing, and music web.cecs.pdx.edu/~zaron/pub/Index.html
Amazing!
Other than the musuc that gives a bit of a headache (might just be me), the model is very well made! Helps a lot to understand the phenomenon!
man, the psychedelic music
I think this is a fantastic example. Thank you for the demonstration. Would it be possible to create a similar experiment but instead flip the water and the oil? The theory behind this is at much deeper depths the water pressure would be greater, hence the thicker fluid at the bottom. If you were able to do this with a much bigger container and have two scales for reading pressure(one closer to the surface with water, the other one in the oil), I'm sure you would be able to demonstrate how an internal wave could create a pressure front with with a very large delta between the two. I also came from watching a review on the Indonesian Submarine on which was stated an internal wave was most likely the candidate
Can we see internal waves with only human eyes ? Do we need any technology to see and identify it ?
Though it seems like there is not much going on at the interface when the seamount is removed, it's notable that the wavelength at the interface appears to be much shorter than that of the surface wave. Cool demo.
Utterly fascinating, plus I learned something new!!!! Music is spot on for the demo.
cool this was mentioned in the quran 1400 years ago: In Surah An-Nur, Allah (SWT) has revealed: “Or [they are] like darknesses within an unfathomable sea which is covered by waves, upon which are waves, over which are clouds - darknesses, some of them upon others. When one puts out his hand [therein], he can hardly see it. And he to whom Allah has not granted light - for him there is no light” (Quran, 24:40).
Or ˹their deeds are˺ like the darkness in a deep sea, covered by waves upon waves, topped by ˹dark˺ clouds. Darkness upon darkness! If one stretches out their hand, they can hardly see it. And whoever Allah does not bless with light will have no light! Ayah an-Nur (The Light) 24 : 40
super visualisation. what are the boundary conditions and domain properties? also, have eigenvectors been imposed or are they induced, are they orthogonal and what are they? What is the forcing function? thanks for vid I'm just getting into turbulence...
The forcing is synthesized from a spatial Fourier representation of random phases within a wavelength band. The phases are first-order autoregressive processes (first integral of white noise).
What's the music used for this? It's so entrancing!
Ya it almost sent me into trance
Adam Raitano created it for this video. I like it too!
the surface looks so calm.. very chaotic in the under water..
The sub being lost brought me here. Such as horrendous way to go.
The music reminds me of I'm Poppy!
so if a submarine is hit by an ocean wave, it's doomed.
anyone else here because of the sunken submarine?
Not with that music
Im here from KRI Nanggala.
me too
Same
the viscosity of the mineral oil and the dyed water are the same?
I wondered the same 🤔
It's a close analogy with other factors being similar
No, unfortunately not. Next time I make one of these, I think I'll use salt-water and alcohol. But I'm not sure if there are dyes that will partition between water and alcohol.
Could oil really represent the upper layer of the ocean?
When it without oil maybe movement the water gone very cruel, because not have preasure on top
The oil layer here floats on top of the water layer below it. It is similar to the warm waters of the ocean which float on top of the colder waters below them.
So this is internal wave... The one that sunk our submarine Nanggala 402
y
y
Good to see I'm not the only one who came here to see this. It's terrifying how huge internal waves can be now that you see them.
Thank you, could you please help me with something? barotropic tides depend on stratification, however, the stratification is usually temporal averaged over one year (no seasonality effect is taken into account) why not? also, the barotropic wavenumber will be different depending on the depth, is there a way to make an assumption of a constant wave number in a given region in order to fit a wave-plane in such region? Thank you very, very much
Please feel free to get in touch via email if you still have questions. I am now affiliated with Oregon State University.
M.M Akbarinte debate kandu vannavar aarokke?😀😀
ഞാനും കണ്ടു.. വല്ലാത്ത ഒരു ആവേശം.. എനിക്കു വിശ്വാസം വർധിച്ചു
Me
( أَوْ كَظُلُمَاتٍ فِي بَحْرٍ لُّجِّيٍّ يَغْشَاهُ مَوْجٌ مِّن فَوْقِهِ مَوْجٌ مِّن فَوْقِهِ سَحَابٌ ۚ ظُلُمَاتٌ بَعْضُهَا فَوْقَ بَعْضٍ إِذَا أَخْرَجَ يَدَهُ لَمْ يَكَدْ يَرَاهَا ۗ وَمَن لَّمْ يَجْعَلِ اللَّهُ لَهُ نُورًا فَمَا لَهُ مِن نُّورٍ ) النور (40) An-Noor അല്ലെങ്കില് ആഴക്കടലിലെ ഇരുട്ടുകള് പോലെയാകുന്നു. (അവരുടെ പ്രവര്ത്തനങ്ങളുടെ ഉപമ) . തിരമാല അതിനെ (കടലിനെ) പൊതിയുന്നു. അതിനു മീതെ വീണ്ടും തിരമാല. അതിനു മീതെ കാര്മേഘം. അങ്ങനെ ഒന്നിനു മീതെ മറ്റൊന്നായി അനേകം ഇരുട്ടുകള്. അവന്റെ കൈ പുറത്തേക്ക് നീട്ടിയാല് അതുപോലും അവന് കാണുമാറാകില്ല. അല്ലാഹു ആര്ക്ക് പ്രകാശം നല്കിയിട്ടില്ലയോ അവന്ന് യാതൊരു പ്രകാശവുമില്ല.
Subhanallah... Mentioned quran
എന്റെ നാസെ ഇങ്ങള് ഇതൊക്കെ ഇപ്പോഴാണോ കണ്ടുപിടിക്കുന്നെ ഞമ്മന്റെ കിതാബിൽ ഇതൊക്കെ പണ്ടേ ഉള്ളതാണ്...അക്ബർ ഇക്ക നിങ്ങളെ വാരിയിട്ട അലക്കുകയാണല്ലോ... ഒന്നു പൊട്ടി കരഞ്ഞു കൂടെ നാസ യാണത്രെ Naza!!!
How deep in the ocean do these internal waves form? I realize this is a demonstration not a scale model. It works very well.
They can form anywhere the water is stratified. This model is meant to represent waves associated with the stratification of the main thermocline, about 700m deep in the mid-Pacific.
OK Dad, share the mushrooms.
Ed--Awesome!!!
Where did you get the background photo at 02:45?
I assumed it was a zoom of some shots we used around 3:20. Adam put it in when he did the editing.
This was mentioned and explained in the holy quraan the muslims book 1500 years ago
No it was not explained 1500 years ago. They have only started to get proper research in the last 100 years... Why do you site vague religious stories and anecdotes as fact? They are not factual. You have a right to faith but do not confuse what you have read in your book of faith as something that explained modern phenomena properly 1500 years ago. If anything it was an epic tale that is exxagerated to emphasize a morale as is with most religious text. But you are wrong. Again not discrediting the mentioning I am pointing out the obvious lie in that it was explained.
@@drdre4397 nah ur just lying
Bro, it with a lot more things was described in the HINDU holy books, purans, vedas etc. about 6000 to 7000 years ago.
however the sea is constant medium... so what you are observing is turbulence?
The sea is not entirely a "constant medium." The average temperature of the ocean surface is about 60deg F, and the average temperature at the bottom is about 35deg F. In between there is a region of relatively rapid temperature change, the "thermocline." The change in water density across the thermocline is represented by the two layers of fluid in this demonstration.
To Me this demonstration has little to do with the oceans simulation or with proper good experimental practice. Mineral oil and water has extremely different viscosity, while ocean water viscosity has not such a step gradient, and you do not have such a separation layer. then the waves you generate are giving energy to both the layers, like an earthwake will do in the real ocean. if you generate waves only on the top layer (as in reality waves are generated by wind), you will see that the bottom layer it is not affected. Again, the height of your mountain, seems very well designed to be just at the right height, and you are watching a tip over phenomen (same you will get with no oil).
Yes, you raise some good points. Regarding viscosity, I would like to make a new version using kerosene instead of mineral oil, but this will be problematic if I make a spill. Regarding the "tip over" or "overtopping" -- yes, that is just for visual effect; the key analogy with the ocean are the waves which move away from the "mountain."
@@edwardzaron5950 I feel like the difference of viscosity did not disprove the example. I can see where he is coming from but this demonstration clearly explained internal waves.
So do submarines experience turbulence?
There might be turbulent water motion in their environment, but most of the time it would not be noticeable or problematic for a large submarine. I don't have direct knowledge of submarines, but I imagine they would need to plan their course and compensate for ocean currents of, at most, a few meters per second. You might be interested to read about this submarine which crashed into a seamount: www.popularmechanics.com/military/navy-ships/a24158/uss-san-francisco-mountain-incident/
@@edwardzaron5950 oh how the Indonesian Submarine Sinking in 2021 answered this question! The sinking of KRI Nanngala was due to large internal waves and may the crew rest in peace🙏
“Or (the unbelievers’ state) is like the darkness in a deep sea. It is covered by waves, above which are waves, above which are clouds. Darknesses, one above another. If a man stretches out his hand, he cannot see it.. (Quran 21:40)
Sorry some correction that is translate of Holy Quran Chapter 24 (An-Nur) verse 40.Holy Quran is the Truth.Subhanallah.
I'm searching this video solely because of this ayah. Never thought that I'm gonna find the same ayah at the top of the comments section lol. Subhaanallah
Subhan Allah, I was also astonished when I heard the ayah, but this is the first time I have seen it explained so visually beautiful. Indeed there is a lot which we do not know and it is nice to have learned a little bit more.
nice demonstration!