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| StriperTalk! All things Striper |
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05-05-2005, 12:23 PM
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#1
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Registered User
Join Date: Apr 2001
Location: Uh, in a spot....
Posts: 5,451
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Like Dennis said, it could be squid but then again as we enter the full first week of May the worm spawn could start happening and they leave little V wakes all over the place.  |
Why even try......... 
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05-05-2005, 01:09 PM
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#2
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Registered User
Join Date: Sep 2001
Posts: 7,649
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Not to sound like a wise ass but from a hydrodynamic standpoint just about anything moving beneath the free surface leaves a wake...has to. Even at very deep depths...the waves may be so small or masked by wind-generated waves so you can't visually pick them out but they are there. As a body gets closer to the free surface the waves become larger in amplitude and more visible. Wave generation is primarily a function of vessel speed and depth below free surface. When the body is within a couple diameters of the free surface it causes significant forces on the body below making it difficult to maintain a near surface depth without active control (fish are good at this).
Below is an image of a simulation I did of a submerged spheroid at a Froude number (a non-dim speed number) of 0.6 and depth to Length ratio of .245. The colors are wave height above (blue) or below (purple) the mean free surface.
End of today’s hydro lesson...
Last edited by Mr. Sandman; 05-05-2005 at 01:16 PM..
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05-05-2005, 01:13 PM
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#3
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Registered User
Join Date: Apr 2001
Location: Uh, in a spot....
Posts: 5,451
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Tuna fisherman know that equation. Bluefin do it all the time being that thier body mass displaces so much water when near to the surface. The old wake without the boat thing.
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Why even try.........
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05-05-2005, 01:19 PM
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#4
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Certifiable Intertidal Anguiologist
Join Date: Feb 2000
Location: Somewhere between OOB & west of Watch Hill
Posts: 35,455
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Quote:
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Originally Posted by Mr. Sandman
Not to sound like a wise ass but
End of today’s hydro lesson...
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OK wise ass  - actually, pretty informative. However, I will venture a guess that a Virginia Class SSN won't ever be lurking at this spot - depth - 2 feet even if it could make it under the 5 foot bridge |
~Fix the Bait~ ~Pogies Forever~
Striped Bass Fishing - All Stripers
Kobayashi Maru Election - there is no way to win.
Apocalypse is Coming:
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05-05-2005, 01:23 PM
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#5
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Registered User
Join Date: Sep 2001
Posts: 7,649
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A cormorrant leaves a heck of a little wake when he is chasing fish. Sort of funny to watch the wake zig zaging around the harbor with nothing in sight.
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05-05-2005, 01:36 PM
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#6
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Registered User
Join Date: Nov 2003
Location: RI
Posts: 21,508
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Quote:
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Originally Posted by JohnR
However, I will venture a guess that a Virginia Class SSN won't ever be lurking at this spot - depth - 2 feet
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You've obviously never been to NUWC 
-spence |
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05-05-2005, 04:06 PM
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#7
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Join Date: Apr 2002
Posts: 22,805
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thats easy
its NESSY on an American holiday....  |
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05-05-2005, 04:15 PM
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#8
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Certifiable Intertidal Anguiologist
Join Date: Feb 2000
Location: Somewhere between OOB & west of Watch Hill
Posts: 35,455
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Quote:
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Originally Posted by spence
You've obviously never been to NUWC
-spence |
The key word in that acronym is "Underwater". The water I'm talking about would barely get my knees underwater when standing up ...
The Hunley would have been stuck in the mud |
~Fix the Bait~ ~Pogies Forever~
Striped Bass Fishing - All Stripers
Kobayashi Maru Election - there is no way to win.
Apocalypse is Coming:
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05-05-2005, 04:39 PM
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#9
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Really Old & Really Grumpy
Join Date: Jun 2002
Location: not a clue
Posts: 4,860
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Only fish god's can skate on water like that..u were being checked out.
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BOAT fish do count.
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05-05-2005, 05:25 PM
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#10
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Moderator
Join Date: Oct 2000
Location: 4 hours from my favorite place
Posts: 5,366
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Quote:
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Originally Posted by capesams
Only fish god's can skate on water like that..u were being checked out.
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Simplify.......
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