Re: Reflections on Aether

From: shevek (shevek4_at_yahoo.com)
Date: 09/01/04 

Date: 1 Sep 2004 10:49:09 -0700

Paul Stowe <ps@acompletelyjunkaddress.net> wrote in message news:<nad7j0pvfh1erb4qr5kock2tt0lhi4mpj7@4ax.com>...
> On 30 Aug 2004 09:25:27 -0700, shevek4@yahoo.com (shevek) wrote:
>
> >Paul Stowe <ps@acompletelyjunkaddress.net> wrote in message news:<hravi0lk8vme1r7n080sriq5t3birvmubg@4ax.com>...
> >> On 27 Aug 2004 14:33:02 -0700, shevek4@yahoo.com (shevek) wrote:
>
> [Snip...]
>
> >>>> No theory of the constitution of the ether has yet been invented which
> >>>> will account for such a system of molecular vortices being maintained
> >>>> for an indefinite time without their energy being gradually dissipated
> >>>> into that irregular agitation of the medium which, in ordinary media, is
> >>>> called heat.
> >>>
> >>> Can any theory of any kind can adequately predict the lifetime of the
> >>> proton from first principles?
> >>
> >> Further, no scales of time have been mentioned, nor how the Kevin
> >> circulation theorem (basically a statement on the conservation of
> >> angular momentum) can be violated in a fully homogenous infinite
> >> medium.
> >
> > Doesn't Kelvin'c circulation theorem only apply to 2D flows?
> >
> >> Sure, the granularity can spin up (like a skater pulling
> >> in their arms) into fine scale vortices that can no longer sustain
> >> destructive amplifying harmonics, but if the is a certain total
> >> circulation, in a friction-free medium how is it dissipated?
> >>
> >
> > Good question.. related to turbulence..
>
> Yeh, like:
>
> http://www.mae.cornell.edu/fdrl/publications/Leweke_Williamson.pdf
>

Wow, interesting - thanks - a bit over my head by it looks like real
progress is being made here.

> >> [Snip...]
> >>
> >>>> [..]
> > Thanks also for your ideas on your site, I am in the midst of reading.
> > I generally agree with a lot of your conclusions but one small
> > problem:
> >
> > "The basic continuity equation of Continuum Mechanics is given as :
> >
> > d(rho)/dt + (rho)Div v = 0
> > ..."
> >
> > should be:
> >
> > d(rho)/dt + Div (rho * v) = 0
>
> http://www.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=[...]
>
> Sorry I couldn't simplify this. [..]

Use tinyurl.com. I couldn't get it to work. I found some material in
a search.. it looks like you could have written D(rho)/dt instead of
d(rho)/dt, and then you'd be right.. but not as consise in my opinion.

>
> > Also you say:
> >
> >>> This definition [incompressibility] requires infinite propagation
> >>> speeds of any perturbations in such incompressible systems,
> >>> eliminating any possibility of wave activity.
> >
> > Not really. A wave can emerge from any restoring force.. even in
> > incompressible systems. For example, surface waves, gravity waves..
>
> To 'wave' the displacement must be finite in speed. A surface wave is
> at the boundary of two disimilar system. One can indeed induce a dual
> surface wave (opposite parallel) on a hypothetical incompressible media
> but, to do so, the disturbance will propagate as an artifically induced
> displacement speed without any connection to the media actual properties.
>

Other waves without surfaces that don't require compressibility:
parallel alfven waves, spin waves / angular momentum waves,
gravitational waves?

Thanks for the info - walking eagle