Taylor Instability in Plasma discussed

[peter09]

Scientific literature talks about Plasma in stars and Blackholes

http://phys.org/news/2012-06-stars-jets ... netic.html

[seasmith]

[

Taylor Instab 3D small

Taylor Instab sm.jpg (38.73 KiB) Viewed 2139 times

http://www.astro.princeton.edu/~anatoly ... side-r.png
[large]

http://www.astro.princeton.edu/~anatoly ... karni.html

Cosmic magnetic fields are produced, on a wide range of spatial scales, by the homogeneous dynamo effect in electrically conducting fluids [1]. The Earth’s magnetic field is generated in its outer core, most likely by spiral flow structures which result from the combined action of Coriolis forces and thermal and/or compositional buoyancy [2]. The magnetic field of the Sun is generated in the convection zone and in the tachocline, very likely under the influence of differential rotation and helical turbulence [3]. A similar mechanism is probably at the root of large scale galactic magnetic fields [4], while inter-galactic magnetic fields are thought to be a product of the so-called fluctuation dynamo [5].

Magnetic fields play an active role in cosmic structure formation. It was in 1991 that Balbus and Hawley [6] highlighted the importance of the magnetorotational instability (MRI, or Velikhov-Chandrasekhar instability [7, 8]) for the angular momentum transport in accretion disks around stars and black holes. In MRI, the externally applied magnetic field serves only as a trigger for the instability that actually taps into the rotational energy of the flow. This is quite in contrast to another magnetic instability in which prevailing currents in the fluid can become unstable by themselves. This latter, so-called Tayler instability [9] is held responsible for parts of the dynamo mechanism in stars [10], and for some observed helical structures in jets and outflows [11].

http://arxiv.org/pdf/0904.1027.pdf

See also "Alfven Radius"

s

[kell1990]

Here it is, folks.

[seasmith]

?

kell1990,

Here's what ?

s

Alfven Radius

push-aside-closeup-l.jpg (46.22 KiB) Viewed 2074 times

http://www.astro.princeton.edu/~anatoly ... karni.html

[kell1990]

?

kell1990,

Here's what ?

s

push-aside-closeup-l.jpg

http://www.astro.princeton.edu/~anatoly ... karni.html

I never could get the second link to open, but it doesn't matter.

I think there is a "cosmic compost pile" effect here. If you look at the diagrams, you will see that there is a very strong force encircling a central point. Now, why is that? I am not sure why this is configured this way, just that it is, and I accept it. There must be a logical reason for it; it's just that I don't know what it is.

The "cosmic compost pile" takes particles from the cosmos and reconfigures them into a rational system, which we would recognize as "elements".

This same configuration can also take elements and make them into the next higher configuration, many of which are molecules. Many of these molecules are what we call ""DNA" or "rNa". This is how we are created from "stardust".

It literally is true that we are stardust.

The mathematicians and the phyicists can throw all that they have at this thing and write reams of copy trying to describe it, but it is basically the cosmic recirculation .

That's what I meant by "there it is."

[jjohnson]

Before you get too far into this discussion, note that the article refers to a Tayler instability, not the other one (which you picked up as the Taylor instability). Both types exist. They are different instabilities in plasma. Suggestion: google Tayler instability, and follow some of the referenced links. He's an interesting guy, actually.

I'm still not sure that liquid metals behave enough like cosmic plasmas to draw analogies between the two behaviors. If the research actually leads to more efficient energy storage and discharge devices, I'm for it, though.

Jim

[seasmith]

3D MHD Simulations of Instabilities
Wang & Robertson 1985, Rastätter & Schindler 1999, … Nonlinear development of the magnetic Rayleigh-Taylor instability
(Stone & Gardiner 2007)

http://www.astro.princeton.edu/~anatoly ... karni.html

[Has several good animations, loads slowwly]


Jim,

Which Taylor Instability are you talking about ?

s

[seasmith]

An argon plasma jet forms a rapidly growing corkscrew, known as a kink instability. This instability causes an even faster-developing behavior called a Rayleigh-Taylor instability, in which ripples grow and tear the jet apart. This phenomenon, the Caltech researchers say, has never been seen before and could be important in understanding solar flares and in developing nuclear fusion as a future energy source. Watch the plasma in action here.
[Credit: A. L. Moser and P. M. Bellan, Caltech ]

http://media.caltech.edu/press_releases/13496

[nick c]

An argon plasma jet forms a rapidly growing corkscrew, known as a kink instability. This instability causes an even faster-developing behavior called a Rayleigh-Taylor instability, in which ripples grow and tear the jet apart. This phenomenon, the Caltech researchers say, has never been seen before and could be important in understanding solar flares and in developing nuclear fusion as a future energy source. Watch the plasma in action here.
[Credit: A. L. Moser and P. M. Bellan, Caltech ]

So then nuclear fusion is taking place on the surface of the Sun? Where have we heard that before?

[quantauniverse]

Exotic metals mimic black holes by holographic duality and challenge the fundamental laws of condensed matter physics. The broad metal iron K line is the commonly accepted spectra signature for a rotating black hole by astronomers. The correct interpretation is not a black hole, but iron in an exotic superstate high density, pressure transition into an unknown form of matter that superconducts electricity etc
http://holographicgalaxy.blogspot.com/2012/06/milky-way-gamma-ray-jets-produced-by.html

[seasmith]

Photo of experimental plasma lab instability: "Kink occurs when the central column becomes sufficiently long to satisfy instability condition", from the presentation, "Simulating Astrophysical Jets in the Laboratory" Courtesy Prof. Paul Bellan, KTTP & Caltechhttp://www.thunderbolts.info/wp/2012/02/26/essential-guide-to-the-eu-chapter-9/


Quantauniverse,

Don't know about blackholes, but i too could imagine the core of the sun threaded by an electric formation similar to the image above and propagating a multitude of peripheral 'instabilities', with resultant surface effects.
Perhaps through the core of Earth also, but in a slower "dark mode".


s

[quantauniverse]

The cores of planets, stars, and galaxies have exotic metal superstates. that rotate and produce magnetic fields. nobody really even knows what earth's inner and outer cores are made of, but liquid conducting metals are required. Scale up the size to a star, and assume a metal core remant will complete the same circuit again, when gas knots collapse and form a new star. When a star explodes, the chemical rxn changes. and common silicon likely forms the spinning core of silicene nanospheres of many sizes that perfectly absorb all visible light, mimicking the supernova black hole. Carbon as graphene and silicon as silicene form nanocomposites and each mimics one anothers EM properties and are very abundant atoms. Hydrogen-6 is common form of hydrogen that conducts electricity too. besides the birkeland pinch to explain stars forming and shining, are metal cores that conduct electricity filaments called birkeland currents.

[seasmith]

... rotating black hole by astronomers -quantaverse

Putative 'black holes' at galaxy centers i imagine to be somehow the inverse vortex of the stellar "instability" process imaged above, (as hinted at by Tesla, Meyl and others), but no unified theory of the two extremes has been published,
as far as i know...

aetheric circuits

[seasmith]

In the imploding Z-pinch, the plasma is the heavy liquid that is accelerated by the magnetic field, which behaves like a fluid with zero mass. Our magnetohydrodynamic simulation shows that the magnetic field effectively blows bubbles in the plasma (figure 6a). The formation of bubbles increases the width of the plasma shell and the rise time of the X-ray pulse. The time it takes the pulse to reach its maximum value is the time between the first bubble and the last spike reaching the axis. Similar simulations by Darrell Peterson of Los Alamos National Laboratory have successfully reproduced the X-ray radiation pulse observed in the Sandia experiments.
In both the simulations and the experiments, the Rayleigh– Taylor instability grows from very small perturbations. The size of these perturbations,...
http://dorland.pp.ph.ic.ac.uk/magpie/re ... WMAY00.pdf


ie: 'kinks"

The falling magnetic field generates a huge electrical field which shoots two high-energy beams out of the plasmoid, the electrons one way, the protons in the opposite direction. The beam consists of many dense helical filaments (one micron across). Some ions are heated to such high temperatures that they fuse.

http://www.angelfire.com/rnb/pp0/plasma3.html
http://alternatenewsmedia2012.wordpress.com/
viewtopic.php?f=4&t=6210&p=67724#p67724

[seasmith]

There are two types of kinetic Alfv ́en waves. For relatively large beta (β > me/mi), e.g., at the magnetospheric boundary, the mode is called the oblique kinetic Alfv ́en wave with the phase velocity
...