Thread: Aero spokes?
View Single Post
Old 08-15-2014, 07:15 PM   #32 (permalink)
aerohead
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 16,314
Thanks: 24,440
Thanked 7,386 Times in 4,783 Posts
vena contracta

Quote:
Originally Posted by freebeard View Post
vena contracta

I spent an entertaining but fruitless hour trying to find a jpeg I saved years ago. It was an early example of using 3D graphics to show anatomical details and was a chart of branches in arterial/veinal structures. As a general rule, sidebranches were at 60°, not 90° and the main flow path was non-linear (i.e., hydro-formed).

The closest I have been able to find is this:

Possibility of Atherosclerosis in an Arterial Bifurcation Model

This is a model simplified for computational purposes; reality more closely follows Victor Shauberger. 3D printed induction/exhaust will rule.
Here you can see that in a Venturi,special care is taken with the decelaration ramp profile to prevent separation in the diverging duct

If you 'revolve' the venturi around a central axis you get a pretty nice 'template.'

In the Borda tube,you can see Lanchester's line of discontinuity creating a streamlined cavitation.The water is attempting to be 'streamlined.'
If you didn't know what you were looking at,you'd swear that your were looking at a Venturi.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote