Fwd: Physics - The Twists and Turns of the Dynamo Effect

-------- Original Message --------
Subject: Physics - The Twists and Turns of the Dynamo Effect
Date: Wed, 04 Apr 2012 00:00:43 -0500
From: Sam Wormley
Newsgroups: sci.physics

http://physics.aps.org/articles/v5/40

Magnetic fields are ubiquitous in the universe. The Earth has a magnetic field that turns a magnetic needle into a useful navigational tool. Other planets, the Sun, and most stars generate their own magnetic fields. It is commonly accepted that most celestial bodies maintain magnetic fields through the dynamo effect: conversion of the kinetic energy of an electrically conducting, but electrically neutral, fluid or plasma into magnetic energy.

On Apr 4, 6:02*am, Sam Wormley wrote:
-------- Original Message --------
Subject: Physics - The Twists and Turns of the Dynamo Effect
Date: Wed, 04 Apr 2012 00:00:43 -0500
From: Sam Wormley

Newsgroups: sci.physics

http://physics.aps.org/articles/v5/40

Magnetic fields are ubiquitous in the universe. The Earth has a magnetic field that turns a magnetic needle into a useful navigational tool. Other planets, the Sun, and most stars generate their own magnetic fields. It is commonly accepted that most celestial bodies maintain magnetic fields through the dynamo effect: conversion of the kinetic energy of an electrically conducting, but electrically neutral, fluid or plasma into magnetic energy.

There is a convergence of planetary spherical deviation,plate
tectonics and geomagnetism using the uneven rotational gradient of the
fluid interior and much of it was developed on this forum.The last
piece added to the picture was a nice one,Venus has no real spherical
deviation,no active crustal motion/evolution other than volcanism and
CME's expose a very weak magnetic field which indicates all three
planetary features are linked using differential rotation hence it is
permissible to make decent planetary comparisons to arrive at a more
productive conclusion for the Earth's surface features and very active
crust.

The original Physical Transactions are a thrilling read, like they
were almost written by detectives on the trail of a crime , a
description of expert mountaineers up a new peak or a new country to
be explored and I have kept true to that spirit. I now watch ham-
fisted attempts to come in and throw the kitchen sink at the fluid
dynamics of the interior whereas it was developed here in this forum
with the barest of objections if not a great deal of comment.It is
possible to assert rotation causes plate tectonics however the
convergence of three planetary traits using a common mechanism and
especially using planetary comparisons is a much better way to
approach the topic.

There are still a few participants around now who sneered at the
original proposal back in 2005 when there was nothing but 'convection
cells' while today the rotational mechanism is seen as a matter of
course but readers must be well aware that ,despite the awful lack of
attribution,the whole endeavor relies on an accurate value for the
maximum equatorial speed and that will not be forthcoming anytime soon.