EM Field of earth

[sunnydart]

We are believing that our outer Core of metallic liquid is rotating at very high velocity around solid inner core generating Current & magnetic Field due to dynamo principle. But what is the Actual truth behind this Story..? Is this Principle is sufficient for Earth EM field..?

[Enthalpy]

It has been shown experimentally to work with a rotating body of molten metal. Few years ago, at Ecole Normale Supérieure de Lyon.

[Dekan]

We are believing that our outer Core of metallic liquid is rotating at very high velocity around solid inner core generating Current & magnetic Field due to dynamo principle. But what is the Actual truth behind this Story..? Is this Principle is sufficient for Earth EM field..?

 

Yes, comparing Earth to a dynamo, doesn't seem intuitively obvious. Because normal dynamos have to spin round fast, in order to generate current/magnetic field.

 

Whereas the Earth takes nearly 24 hours to complete just one single rotation. That seems quite slow. But perhaps it's only an effect of scale.

 

I wonder, suppose we consider a scale-model. In which the Earth is reduced from its diameter of about 12,800 km, down to a sphere of (say) 10 cm in diameter- ie about the size of a normal dynamo.

 

How fast would this 10 cm dynamo be spinning, if it goes at the equivalent rate of the Earth - and would it generate any significant current or magnetic field?

[sunnydart]

Dear Enthalpy , PLease give some brief details of "rotating body of molten metal. Few years ago, at Ecole Normale Supérieure de Lyon. "

Dear Dekan, Please on reducing the diameter doesn`t increase the Rotation of that body because both are at same axis.

[Enthalpy]

"VKS experiment" or "expérience VKS"

http://perso.ens-lyon.fr/nicolas.plihon/Publis/Aumaitre_CRAS_9.pdf

[John Cuthber]

"Whereas the Earth takes nearly 24 hours to complete just one single rotation. That seems quite slow."

It seem slow if you think that the speed of sound is slow.

The equator is moving at about a thousand miles an hour.

[sunnydart]

Enthalpy I gone through the experiment.. But Is it possible to rotate any Liquid at very high Pressure which directly increase its Viscosity....

[Ophiolite]

Yes.

[Enthalpy]

Technologically achieveable pressure does multiply the viscosity a few times.

In case you're thinking at the VKS experiment, a low viscosity only reduces the time constants.

[sunnydart]

Enthalpy- I will give u 1 live Experiment - take 1 Injection- Fill the water in it remove all air bubbles in it. now close the bottom mouth of Injection.. & Give compressible force by you thumb.. Now try to shake or rotate water in it..

 

We can Generate electric city by this method also.. Magnetic Hydro Dynamic- But we can generate electric city & magnetic field at ATM. pressure not at 3.6 lakhs ATM..?

[FrostySnow]

I think it is the other way around. Look at any planet and you will see a vast difference of surface speed to inner core. The moons also provide a hint about this in that most are in synchronous orbit one side is always facing the planet. The exceptions to this have either a hot core or interact with other moons. The force and power of our ocean currents also provide hints that say the outer crust is rotating around the core. The strength and westward flow of polar currents is another clue. Their are also undersea horizontal vortex's in certain locations, it would be difficult to explain this by any other means.

The Suns emissions are captured by the earths magnetic attraction, and these super sub atomic particles are ripped off of protons at the auroral ring. After being stipped the proton becomes an electron, and is then repelled towards the south pole. The movement of the crust over the core with this fusion injection drive the dynamo. A spinning magnet in a superconductive space forces the magnetic field outward by reflection to create the Van Allen belts, protecting us from direct radiation. Thats what i think anyway..

 

Here are the figures,

Speed of earths crustat 3400 internal boundary. 10681km/24hrs = 445 km per hour

 

Speed of the earthscore locked to face moon ~1500km (outer boundary inner core) 4712 km/672hrs = 7 km/h

 

So the earth’s difference in core to crust speed is ~ 437 kmper hour, does that make your generator work?! I think you can calculate withthis in mind.

 

 

 

 

We are believing that our outer Core of metallic liquid is rotating at very high velocity around solid inner core generating Current & magnetic Field due to dynamo principle. But what is the Actual truth behind this Story..? Is this Principle is sufficient for Earth EM field..?

Edited October 16, 2012 by FrostySnow

[sunnydart]

 

 

 

 

>From above relation we find that we have good Linear Velocity at surface of earth & may be more good above Atom sphere which also rotate with earth..

> So, Is this possible that Electric city & Magnetic field form at that extreme point in Atmosphere rather than inside The CORE..?

 

 

 

 

 

>From above relation we find that we have good Linear Velocity at surface of earth & may be more good above Atom sphere which also rotate with earth..<br style="font-size: 13px; line-height: 16px; background-color: rgb(248, 250, 252); ">> So, Is this possible that Electric city & Magnetic field form at that extreme point in Atmosphere rather than inside The CORE..?

Edited October 18, 2012 by sunnydart

[FrostySnow]

The outer core is the shock absorber of the system, it is the inner core that is locked to the moon, so from its outer surface to the outcore/mantle boundary is the "transition zone. A proof for this would be to place a large (1200 km dia) conductor in the polar region. 78 degrees is the prefered aurora position, as well as the "magic angle" of 54.7 deg. (look up magic angle!). An easy test would be a few circles of 2.9 km diameter overlapping by 1/4 of circumference. I think it will not only produce electricity, but will also exhibit some super-conductive levitation! There is a record of an approx. 11 km drift per year of "pole position" (which on its own should cause induction.

 

cheers

 

 

We are believing that our outer Core of metallic liquid is rotating at very high velocity around solid inner core generating Current & magnetic Field due to dynamo principle. But what is the Actual truth behind this Story..? Is this Principle is sufficient for Earth EM field..?

 

in short NO, the atmoshere is trivial to the earths mass and the upper atmosphere has nothing to push upon. The power comes from the core and all above are controlled by its mass and magnetic moment.

 

 

 

 

>From above relation we find that we have good Linear Velocity at surface of earth & may be more good above Atom sphere which also rotate with earth..

> So, Is this possible that Electric city & Magnetic field form at that extreme point in Atmosphere rather than inside The CORE..?

 

 

 

 

 

>From above relation we find that we have good Linear Velocity at surface of earth & may be more good above Atom sphere which also rotate with earth..<br style="font-size: 13px; line-height: 16px; background-color: rgb(248, 250, 252); ">> So, Is this possible that Electric city & Magnetic field form at that extreme point in Atmosphere rather than inside The CORE..?

 

 

 

 

The outer core is the shock absorber of the system, it is the inner core that is locked to the moon, so from its outer surface to the outcore/mantle boundary is the "transition zone. A proof for this would be to place a large (1200 km dia) conductor in the polar region. 78 degrees is the prefered aurora position, as well as the "magic angle" of 54.7 deg. (look up magic angle!). An easy test would be a few circles of 2.9 km diameter overlapping by 1/4 of circumference. I think it will not only produce electricity, but will also exhibit some super-conductive levitation! There is a record of an approx. 11 km drift per year of "pole position" (which on its own should cause induction.<br style="font-size: 13px; line-height: 16px; background-color: rgb(248, 250, 252); ">

in short NO, the atmosphere is trivial to the earths mass and the upper atmosphere has nothing to push upon. The power comes from the core and all above are controlled by its mass and magnetic moment. The symmetries of rotation with the sun are also impressionable

[Ophiolite]

Here are the figures,

Speed of earths crustat 3400 internal boundary. 10681km/24hrs = 445 km per hour

 

Speed of the earthscore locked to face moon ~1500km (outer boundary inner core) 4712 km/672hrs = 7 km/h

 

So the earth’s difference in core to crust speed is ~ 437 kmper hour, does that make your generator work?! I think you can calculate withthis in mind.

Unfortunately your hypothesis is falsified by the facts. Seismic observations suggest a small differential in rotation rates between the outer and inner cores, but there is no evidence that the inner core is locked to the moon's orbit.

 

The most generally accepted conclusion is that the differential in rotation rates is a prograde one. Initially this was thought to be a between 1–3° per year¹ . More recent work suggests it is smaller, perhaps as little as 0.2° per year^2,3.

 

While planetary rotation plays a role in sustaining the field it is the convection in the outer core that provides the source of the field⁴. Your suggestions, while imaginative, are unfortunately wrong.

 

1. Aurnou, J.M. et al "Mechanics of Inner Core Super Rotation" Geophysical Research Letters,, Vol. 23, No. 23, P. 3401, 1996

2. Tromp, J. "Inner-Core Anisotropy and Rotation" Annual Review of Earth and Planetary Sciences Vol. 29: 47-69 2001

3 " Zhang, J. et al "Inner Core Differential Motion Confirmed by Earthquake Waveform Doublets" Science 309, 1357 2005 Link

4 G.A. Glatzmaier and P.H. Roberts, "A three-dimensional convective dynamo solution with rotating and finitely conducting inner core and mantle," Phys. Earth Planet. Inter., 91, 63-75 1995.

Edited October 19, 2012 by Ophiolite