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- From: terry@asl.dl.nec.com
- Subject: Wedge-Out #2
- Message-ID: <1993Jan5.171210.25925@asl.dl.nec.com>
- Originator: terry@aslss01
- Sender: news@asl.dl.nec.com
- Nntp-Posting-Host: aslss01
- Organization: (Speaking only for myself)
- Date: Tue, 5 Jan 1993 17:12:10 GMT
- Lines: 37
-
- 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
-