🚀 go-pugleaf

Hi again,

A diagram that may help explain why I used the "wedge-out" terminology:

                              + 
           "fast" wedge ---->+ +    "slow"
                             + +     wedge       +
                            +   +             + +
                            + | +    /     +   +
                           +  |  +  v   +   / + <---- "fast" wedge
                           +  V  +   +    /  +
             Void Surface ----------,_  L   +
                                      \_   +
                             Void       \_
                           Interior       \ Void Surface

Not very easy to read (or draw) in ASCII, but the basic idea is that an
inward spherical collapse will develop "slow wedge" regions n which the
wedge tip points inwards toward the center of collapse, and "fast wedge"
regions whose bases will form the interior of the collapsing void.

Both types will be moving inward, but I'm suggesting that slow wedges will
be undergoing deceleration as the void collapses, while the fast wedges
will be undergoing acceleration.  The fast wedges will also become smaller
and thinner as collapse continues, giving up fluid on their exteriors to
the surounding (decelerating) slow wedges.

It's a bit easier to see why I chose the "wedge out" terminology when looking
at this larger scale flow pattern.  I'm proposing that this sort of thing
can extend all the way down to individual molecules if the pressure/vacuum
bondary is sharp enough.  (It was the easier-to-draw molecule-level case
that I diagrammed in the UC draft.)

Comments are welcome. (Any non-equilibrium fluid flow experts out there?)

				Cheers,
				Terry Bollinger