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Author Topic: Global Warming is WITH US  (Read 28099 times)

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AGelbert

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Re: Global Warming is WITH US
« Reply #1470 on: September 01, 2018, 01:58:58 pm »


This Video of a Lab Simulated Rogue Wave Will Make Your Palms Sweat

August 30, 2018 by Mike Schuler


It’s a sailor’s worst nightmare. A monster wave that comes out of nowhere, two to three times bigger than the others. In certain cases, waves like this are capable of swallowing a ship whole. Yet to this day we still don’t know much about rogue waves or how they form. Actually, most of what we do know about these freak waves comes from actual experience. We know they’re out there, and many of you could probably share a sea story or two of your own.

But researchers at the Aalto University in Finland say they are now able to recreate the phenomenon in realistic oceanic conditions inside a laboratory, which is helping them learn more about how and why these mysterious and sometimes deadly waves form.

Check it out:


Professor Amin Chabchoub from the Aalto University explains:

“Potentially extremely dangerous realistic rogue waves can now be controlled and generated at will in laboratory environments, in similar conditions as they appear in the ocean. This will help us not only to predict oceanic extreme events, but also in the design of safer ships and offshore rigs. In fact, newly designed vessels and rig model prototypes can be tested to encounter in a small scale, before they are built, realistic extreme ocean waves. Therefore, initial plans may change, if models are not resistant enough to face suddenly occurring freak waves.”

According to the researchers:


The birth of rogue waves can be physically explained through the modulation instability of water waves. In mathematical terms, this phenomenon can be described through exact solutions of the nonlinear Schrödinger equation, also referred to as “breathers”.

[These breathers describe the dynamics of unstable water waves that become rogue: the instability arise from a calm state. As a result, now we know how rogue waves may appear in realistic oceanic conditions.]

For a couple of years, the research team around Professor Chabchoub has already been able to create steered rogue waves in laboratory wave flumes. However, this has only succeeded in perfect regular wave conditions. In nature, this is rarely the case.

The results of their findings were published today in the Physical Review Letters 2016. Here are some more photos from the lab:


Photos courtesy Aalto University

https://gcaptain.com/video-lab-simulated-rogue-wave-will-make-palms-sweat/

Agelbert NOTE: Here is a photo series from my article on Predicted Ocean Wave Activity showing what happens to a modern huge crude oil tanker when at least one of these giant waves (that are predicted to be increasingly more common from Catastrophic Climate Change) hits the ship:


Quote
To give you a better idea of the huge threat a giant wave or three is to a large tanker or cargo vessel,  I took some screenshots from a video of a wave laboratory testing the effects of 72 ft. waves on a modern supertanker. I'm sure Big Oil is paying attention, regardless of what they say in public.  ;)


3D simulation by Agelbert of tanker model is below the wave tank screenshot

5: The above is catastrophic for a tanker. 6: Supertanker scale model in scale 72 ft. waves is rolled and sinks.

Quote
The tanker completely capsized. In a real world situation, this is a death blow to the crew because it happens too fast to get survival gear on or reach the lifeboats, even if they are the emergency egress sealed type you saw earlier. That is why both tanker and cargo ships do everything they can to avoid being broadsided. In the real world, when the engines are lost in these types of seas, the only way to survive is to immediately abandon ship on a free fall enclosed life boat capsule.

If the above series of screen shots are not convincing enough to the reader of the threat shipping faces from giant waves, the following video series will leave no doubt in your mind that world shipping is incapable of handling the routine 30 to 35 meter waves that the Hansen et al June 2015 paper predicts for a ΔT = plus 2C (and beyond) world.

Climate Change, Blue Water Cargo Shipping and Predicted Ocean Wave Activity: Part 3 of 3 parts

Wait on the Lord: be of good courage, and he shall strengthen thine heart:
wait, I say, on the Lord. -- Psalm 27:14

 

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