Does anyone else notice at the end how the smoke starts to turn into a shit ton of sub smoke circles moving in all different directions, spaced nearly perfectly apart??????
Vortex rings.
A vortex is fluid rotating around an axis (also has something known as vorticity). Vorticies have to follow a couple of rules, and the one that’s probably relevant here is Helmholtz’s Second Theorem, which simply states that a vortex tube cannot end in a fluid; it must either end at a surface or form a closed path. In the case of smoke rings, the vortex tube closes in on itself to form a torus.
(img from Wikipedia)
As you can see, a smoke ring is essentially a ring of rings all spinning about.
So what happens when two of them collide? Well, in the ideal case, where the two rings were of the same magnitude and opposite in rotation, they’d hit each other and…stop. Each would have an equal effect on the other and we’d have a stagnation point. Which would look bizarre, but also really cool.
Alas, the real world is often different from ideal physics, and you’re pretty much almost never going to get that. There’s going to be some variation somewhere, which means that the two rings will break up as seen here. But because of the smoke particles, you can see the dissipating, evenly-spaced bits of vortex tubes.
this is my grasp of how football works: two teams of men want the ball very badly but are incapable of sharing it. one team attempts to deliver the ball to their holy ground while the other attempts to prevent this. occasionally an evil man will appear and speak curses to the men, causing them grief and dishonor
How does band of apocalyptic renegades at the eleventh hour,
Somehow defeat this otherworldly power? How do we emerge victorious from the madness, leave the battle field with Bill powerless and friendless?
Yo turns out we have a secret weapon, a fugitive you know and love whose unafraid to step in.
Now with his family back we can end the weirdmageddon.
EVERYONE GIVE IT UP FOR THIS DIMENSION’S FAVORITE FIGHTING CON-MAN!
Tonight please pray for all the innocent lives that will be lost in Syria due to the airstrike decision which has been agreed upon.
So everyone is clear: The civilians have no escape. The innocent people cannot get out. Governments told them to evacuate or they will die. The ISIL militants have said they will kill every person who leaves their house.
There IS no escape for these people, and the government will try to claim they gave ‘fair warning’ to the civilians and will try to claim all casualties must therefore be ISIL members or too stubborn. This is a war crime, this is murder, and there is no chance for these innocent people who want no part in this to escape.
Please, please pray for them tonight or send positive vibes or whatever you do, please do not forget these are innocent people who have done nothing wrong and just wanted to live their lives.
A Middleground 