Re: Coanda effect, exhaust extraction, and big stacks!

["Graydon D. Stuckey" <graydon@apollo.gmi.edu>]

On Fri, 28 Nov 1997, Janet Scruggs wrote:

> Coanda effect does not happen inside a tube as the flowstream is
> constrained to follow the curvature of the walls.  Looking further into the

So is this why a good velocity stack has the entry curl around outside 
back into the outside wall of the tube?   I am surmising here that the 
coanda effect helps the incoming air adhere to the outer reaches of the 
velocity stack, and that the stack then turns the airflow into the bore 
of the stack, where presumably some other "effect" "law" or "principle 
takes over.

> coefficients in excess of 9.0!  (If you have goose bumps at this point, you
> _are_ a Nerd. But don't worry... if you rub them with your calculator
> they'll go away in a minute or so.)

No doubt, an HP will work best in this application...

Later,
Graydon D. Stuckey 
out of ideas for a cool .sig file...    sorry.