"sean" wrote in message
...
|
| On Feb 2, 2:04 pm, "Androcles" wrote:
| "sean" wrote in message
|
| ...
| On Jan 23, 2:54 pm, "Androcles" wrote:
|
| "sean" wrote in message
|
|
...
| I have supplied a graphic explanation of the `Variable speed Core`
| model at the following url
|
| http://www.youtube.com/watch?v=CiCBrXKIH_0
|
| | Studies of the seismic record indicate that seismic waves travel
| | fastest along a north-south axis from the southern hemisphere to
| | Siberia (and more recently suggesting an easterly shift to over
| | Alaska) implying that over the the last century it appears that the
| | earths solid core is rotating in an easterly direction. The
conclusion
| | made from this data is that the earths solid inner core can be said
to
| | be rotating west to east at approximately 1 degree longtitude a year
| | faster than the mantle.(Song, Richards 2005) This implies then, that
| | relative to Earths solid inner core, the mantle and the outer part
of
| | the liquid core can be said to be moving in a westerly direction.
This
| | also implies that there must be speed gradient in the liquid core
| | across its radius (relative to the mantle), of approximately 0
degrees/
| | year near the mantle to 0.1 degreeslongtitude/year near the solid
| | core. Thus using Lenzs` law, one can predict that the larger volume
of
| | the outer part of the liquid core will induce a residual westerly
| | electrical current in the inner part of the liquid core (ie the
outer
| | liquid core moves in a westerly direction relative to the inner part
| | of the liquid core). Flemings Right Hand rule predicts this westerly
| | direction of the electrical current will in turn induce a magnetic
| | south pole near Earths geographic North Pole. Recent experiments
| | confirm this, in that a freely rotating liquid metal will generate a
| | self sustaining magnetic field without a neccesary seed magnetic
field
| | to kickstart the dynamo effect as previously thought.(Generation of
a
| | Magnetic Field by Dynamo Action in a Turbulent Flow of Liquid
Sodium.
| | R. Monchaux et al 2007).
| | As the seismic record shows that sound waves travel fastest across
| | earths N-S axis, this could also be consistent with the solid inner
| | core being slightly elongated in the earths N-S axis. (sound waves
| | travel fastest in a denser medium) Following from this, it can be
| | hypothesised that contrary to the speculation that the earths core
is
| | a rigid crystal, one could alternatively give the `solid` inner core
| | non rigid, or elastic properties. Observations support this
| | possibility (Andrew Jephcoat and Keith Refson (2001-09-06). "Earth
| | science: Core beliefs". Nature 413: 27-30. doi:10.1038/35092650.) If
| | so its shape could then be said to oscillate over large timescales
| | between that of elongated in the N-S axis to stretched along the
| | equatorial plane. Obviously this implies that the inner cores`
| | rotational speeds would vary between slower and faster than the
| | mantle, when the solid core goes from wider at the equator to
| | stretched at the poles respectively. The historical record of Earths
| | pole reversals and changing field strength can thus be well modeled
by
| | this variable core speed model. In that if currently it is accepted
| | that the `solid core` is stretched is the north south axis and
rotates
| | faster than the mantle then it follows that when the cores volume
| | changes shape to that of more stretched in the equatorial axis, It
| | must then be forced to slow its rotational speed and therefore
rotate
| | slower than the mantle . Not faster as currently observed. (ie the
| | core then will rotate in a westerly direction relative to the
mantle)
| | In turn this would reverse the relative motion between the inner and
| | outer parts of the liquid core (as described above)
| | and in turn reverse the induced equatorial direction of the induced
| | electrical current which would then reverse the direction of earths
| | induced magnetic field from N-S to S-N. THis is observed in the
| | historical seismic record.
| | The current weakening of Earths magnetic field must then be due to
the
| | solid cores` rotational speed slowing relative to the mantle. In
other
| | words if it is assumed that currently the core is observed to be
| | travelling faster than the mantle in an easterly direction at 0.1
| | longitude per year than that rate must have been faster in the past
| | and will be slower in the future. This can only be explained if it
is
| | assumed that the `solid` core itself is becoming less stretched in
the
| | N-S axis and tending towards becoming stretched in the equatorial
| | axis.
| | To explain the observed off axis magnetic North pole using this
| | `variable core speed model` one can again refer to the seismic
record
| | which shows that the axis of anisotropy, corresponding to the
fastest
| | direction for seismic waves, tilts about 10 degrees from the Earth's
N-
| | S axis of rotation, towards Siberia. From this data one can
interpret
| | that the inner core not only could be `stretched` in the N-S axis
but
| | also be physically tilted 10 degrees off axis towards Siberia as it
| | rotates within the earths core. In effect while it is rotating
faster
| | than the mantle, its axis of mass is also tilted off center by 10
| | degrees and stretched slightly in the N-S axis. This will in turn
| | effect the equatorial rotation of the liquid inner core which acts
as
| | a boundary between the mantle and the solid inner core. Modeling the
| | liquid core flow is always speculative for any model, but it is not
| | unreasonable to assume that a 10 degree off axis solid core that
| | rotates around its N-S center of mass could create a flow in the
inner
| | part of the liquid core that was also tilted in an equal but
opposite
| | 10 degrees `off axis` in the equatorial plane. Resulting in an equal
| | and opposite tilt in the induced magnetic North pole of 10 degrees
| | towards the Arctic, using Lenz and Fleming as described previously.
| | This predicted tilt in the magnetic pole towards the arctic is
| | consistent with observation. As is the prediction that the axis of
the
| | solid core is tilted towards Siberia.
| | The final element is to explain the northerly drift of the magnetic
| | North pole. There is insufficient seismic data to confirm or refute
| | this prediction but the variable core speed model presented in this
| | paper predicts that this would be due to an equal northerly drift of
| | the solid inner cores rotational axis from more than 10 degrees off
| | axis as currently observed to one that will be tilted by 0 degrees,
or
| | directly N-S. In other words if the solid core is said to be
currently
| | rotating tilted by 10 degrees off axis and this induces a off axis
| | electrical current and off axis magnetic pole. Then a solid core
that
| | is aligned to earths geographic N-S axis as it rotates will generate
| | no off axis electrical current and therefore no off axis magnetic
| | field. In other words the cores volume is stretched in the N-S axis
| | and tilted by 10 degrees but is changing shape as it rotates so that
| | its N-S stretch is tending towards 0 degrees. In fact it would be
more
| | correct to say that its nvolume is changing from stretched 10
degrees
| | off axis to not stretched in either the N-S or equatorial axis. This
| | would be in line with a slowing down of the solid cores rotational
| | speed as seen in the observed weakening of the overal magnetic
field.
| | (The variable speed core model predicts that when the core is
| | perfectly circular in volume it rotational speed relative to the
| | mantle will be the same as the mantle ,ie 0 degrees per year. And
*no*
| | magnetic field will be generated)
| | The conclusion this `variable speed core` model makes is that all
the
| | combined observations of earths core and magnetic field indicate
that
| | the solid core is currently stretched in the N-s axis, tilted off
| | center by 10 degrees and rotating faster than the mantle in an
| | easterly direction by 0.1 degrees per year. But also observations
| | indicate that it must be slowing down, relative to the mantle,
tilting
| | its axis more towards earths vertical N-S geographical axis, and
most
| | likely becoming less stretched in the N-S axis.
| |
| | Sean
| | see this url for an accompanying graphic explanation of the variable
| | speed core model...
| |http://www.youtube.com/watch?v=CiCBrXKIH_0
| |www.gammarayburst.com
|
| You sure went to a lot of work and are to be congratulated on
| the pretty pictures, but sadly this motor rotates in either
| direction when the brushes are vertically
| aligned:http://cache.eb.com/eb/image?id=63375&rendTypeId=4
| and you do not have any brushes.
|
| | Why do I need brushes in my model.
|
| Why do you need a question mark at the end of that statement?
| You need the brushes to connect the induced current in the coil
| to the rest of the circuit in a normal setup but..
| The circuit in the liquid core I describe is self contained.
| It doesnt need to be connected to itself. For instance in a
| dynamo ,.. does the coil that spins in the magnetic field need to
| be attached to itself ? No. It only needs brushes if you want
| to attach the rotating coil to an outside circuit. THink of the
| earths rotating liquid core as a coil that isnt attached to an
| outside circuit. Why do I need brushes? Im not suggesting the
| current in the core needs to be attached to any circuit outside the
| core.If I did ... THEN I would need brushes. But I dont so I
| dont need to specify brushes.
| | The liquid core is connected
| | to itself.
|
| So is the rotor in an AC induction motor, but the magnetic
| field reverses 50 times a second (60 in the USA). The Earth's
| magnetic field is DC.
| The earths core is not an ac motor nor does it resemble
| one. Whatever gave you that idea.?
| I certainly never said it resembled an AC induction motor.
| | The current flows around it and doesnt need to be
| | connected to anywhere else by brushes .
|
| The problem with that idea is resistance.
| Is the Earth's core a superconductor?
| No. Otherwise the eraths magnetic field would be tremendously
| powerful. Nonetheless it conducts at least on a residual
| basis. We have the observations of the earths field to
| attest to this. AND,.. the observations that a rotating liquid
| metal will without outside input generate an electromagnetic
| field
| | And you havent made it clear why your diagram proves
| | that Lenzs law is incorrect.
|
| http://en.wikipedia.org/wiki/Lenz's_law
| (wiki)..."The direction of the induced current depends on
| whether the north or south pole of the magnet is
| approaching: an approaching north pole will produce an
| anti-clockwise current (from the perspective of the
| magnet), and south pole approaching the coil will produce
| a clockwise current..."
| Yes I concede this point to you although wiki doesnt mention
| that reversing the motion of the conductor still reverses
| the induced magnetic field. Thats the main point my
| model was stating and it still stands.
| And rather than parralel, as Ive suggested previously,
| the liquid core induces a current at right angles to
| its motion. From core to mantle. I think Ill have to
| change my simulation at..
| http://www.youtube.com/watch?v=CiCBrXKIH_0
| To one that has the current direction from core to mantle
| rather than rotating around the core.
| Nonettheless when the direction of the motion reverses the
| induced field still reverses. This is whats observed and means
| my model is still consistent with the observations and with
| Lenz and Fleming.
| I think essentially this is similar to what
| happens in the faraday wheel? The field is at right angles
| to the current and motion. And the motion is at right
| angles to the field and current.
| What earths core shows us and what...R. Monchaux et al
| (Generation of a Magnetic Field by Dynamo Action in a
| Turbulent Flow of Liquid Sodium 2007)...
| confirm is that where a liquid faraday wheel rotates ..the shear
| of the atoms motion across the radius of the rotating liquid
| supplies the induced current which in turn induces the magnetic
| field. In other words a liquid faraday wheel can induce its own
| field as long as force is supplied through rotation,without
| neccesitating an applied external magnetic field. I know
| you wont like this but the fact is that this theoretical premise
| I suggest is confirmed by R Monchaux et al. If I was wrong
| then they would not have observed a roating liquid conductor
| generate and sustain a magnetic field without any external
| applied emf.
| | As far as Im aware an electrical
| | current always flows in the direction of the motion of the magnetic
| | field.
|
| I'll change the batteries in my fridge magnets then. My grocery list
| must be about to fall on the floor, I haven't changed them in years.
| Did I ever say that your permanent magnet wasnt permanent?
| No. You imagine facts .I never even mentioned permanent magnets
| or whether or not they are permanent or not.
| | At least thats what my reference indicates. For instance
| | if you have a solenoid arranged so that it is vertical on a
| | desk. If you then move
|
| Move? What's this about "move"?
| I don't move my fridge magnets very much. When I do
| then I create a small current in the door, but no current
| without movement.
| Exactly as I was saying. If you move your magnet,..
| you create a small current.


First you need a magnet to move.


| What makes you think that when
| I say.."a moving magnet induces a current""
| I actually mean .." a moving magnet does not induce
| a current".. ??!

I didn't think it or say it.
What makes you think you can pick yourself up by your bootstraps,
or the Earth's magnetic field is caused by currents which are induced
by the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field which is caused by currents which cause
the Earth's magnetic field ?



| | a magnet south pole first downwards
| | into the top end,. the current in the solenoid
| | flows from top to bottom. The same occurs if the magnet
| | is reversed so that its north pole enters the top end of
| | the solenoid first and moves downwards.
| | But if you move the magnet either north or south pole first
| | upwards from the bottom of the solenoid then the current is
| | reversed in the solenoid. This is what any reference claims
| | is observed. It is this effect that I use to explain
| | how the current is induced in the liquid core.
|
| Yes, but the solenoid doesn't induce any voltage without you
| applying a force to make it move.


| Well Im glad you agree with me now that a moving magnet
| will induce a current.

I've known how generators work since I as a teenager riding
a bicycle with lamps to light.


| So what is the force that rotates the core relative
| to the mantle?

| First of all it is accepted by the scientific
| community that the earths core DOES rotate relative to the mantle

Second of all it is NOT accepted by the scientific community
that the Earth's core rotates relative to the mantle, you made that up.

What is the force that rotates the core relative to the mantle?


| Ive cited one source in my initial post to clarify that its
| not me imagining this.Here it is again..
| Song, Richards 2005 Check it out on google .

No. Either a give me a specific reference or shut up, I'm
not doing research on songs.



| So Ive responded to this observed fact

No you haven't and there is no observed fact. Answer the question.

What is the force that rotates the core relative to the mantle?