Successfully taken slow motion picture of 'small vortex' finally produced by 'vortex collision' with trial and error for 4 years

YouTuber's Destin Sandrin, who has published a lot of science education movies, has been trying to compare the way the vortex of the northern hemisphere and the southern hemisphere wraps backwards, thoroughly compare how the vortex of the northern hemisphere and the southern hemisphere turns counterclockwise, and release the lightning with the Tesla coil gun I have taken a number of experimental videos with extraordinary curiosity, inquiry and action power. Mr. Destin released a movie of super-length experiment "I made a small vortex ring by colliding two vortex rings" that it took 4 years a month to what success.

Two Vortex Rings Colliding in SLOW MOTION - Smarter Every Day 195 - YouTube


Red and blue vortex rings struck underwater.

I conflicted.

I heard the voice of excitement that "You have succeeded now".

Lord of voice is Destin Sandlin of SmarterEveryDay. Mr. Destin says, "There was a great way to shoot this movie," Mr. Destin said she taught Australian studies that "there is something fun" five years ago.

In the study movie, when two red and blue vortex rings collide, a new small vortex ring appears on the outer circumference of the collision rings.

Mr. Destin who loves fluid mechanics seems to be interested in this research soon.

So we started searching on the contents of research on Google.

Although it is fun but no one has reproduced the same movie, Mr. Destin decided to try it myself.

I conducted an experiment seeking cooperation from the egg of the researcher who just graduated from college.

However, it did not lead to success. At this point, Mr. Destin seems to have felt "this is troublesome".

Then, days of trial and error started, such as self-making experimental tools.

Going back 4 years ago

First of all, the movie started from researching T. T. Lim's paper submitted to Nature. No doubt Mr. Destin of that time would have thought that it would take four years to complete this movie.

In the paper, when two vortex rings collided, a large ring was born, and a phenomenon in which many small rings appeared on the outer periphery was observed. The goal is to reproduce this and put it in the image.

In order to accommodate how the vortices collide to create small vortices, we have prepared the ultra high-speed camera for slow motion " Phantom v 2511 ".

The movie suddenly went back three years ago.

With electric actuator ......

The tube extending from the actuator branches in two branches.

Apparently it is a pattern of a strategy to steadily create a colliding vortex by sending out the liquid precisely at the same time using an actuator.

Mr. Destin's experiment is dedicated to motion control expert David Renderman.

Put water in the tank and ready.

When ink like two vortex rings or balls is struck in the water ......

collision

Mixed two color inks. "It is good for the first experiment," Renderman says.

However, after that, collision of vortex rings can not be thought of as expected.

Failure to repeat the task of replacing the water.

Ink in the mouth ......

Mr. Destin sent from his mouth.

But the ink intersects without collision. Failure continues.

Vortex rings of the same size ......

Although it collides from the front, no phenomenon like the article does not occur.

Looking at slow motion, it seems like a head-on collision ... ....

It will not work.

Mr. Destin who repeats the failure to the extent that it is no longer known how many times the experiment is done.

Render Man also does not give up.

Change the design of the nozzle that ejects ink ......

Change the speed of launch.

Every single day repeating mistakes.

Even though there seems to be something that is supposed to work, it will not work quite well.

A clean collision ......

The ink that should have changed to an unexpected shape.

On the red ink side, a new ring was born.

But small rings did not show up.

"I feel like going to work today," Mr. Destin tells his enthusiasm before the experiment.

Two vortex rings collide.

A big ring appears ... ...

A small ring appeared on the outer circumference.

The circumference of the big ring ......

Change to a small vortex ring.

Even if a big ring disappears, a small vortex ring keeps drifting in the water. Finally, the experiment succeeded.

And, it was able to fit in the high speed camera how the two vortex rings collided to create many small vortex rings.

According to Mr. Destin, the experiment starting from a simple motive "I want to reproduce what I imagined" gradually changed. What I thought was the problem of "fluid dynamics" and "dynamic control" is totally different, and the substance seems to be problem of "patience" and "persistence".

Partner Renderman taught Mr. Destin, "I will never stop the experiment even if I repeat mistakes.

Every time I fail, I learned something.

"Why are you afraid to challenge?" "If you fail, just put water in the tank and hit the next shot."

Destin talks that what you want to know about this movie is "patience". Everybody should have their own "vortex collision", as classes and tasks are hard at school and work projects are tough. What is necessary to overcome that difficulty? I want you to think about. "What is the vortex ring collision for you?"

· Extra Mr. Destin who finally succeeded in photographing slow motion movies finally spent four years and unremitting effort for the purpose of making a small vortex ring by colliding the vortex ring, it has been 4 years A movie that summarizes the state of trial and error as 12 hours "short" has also been released.

Behind the Scenes: Two Vortex Rings Colliding in SLOWMO (4 yrs, 12 hour MEGACUT) Smarter Every Day - YouTube