Re: Spin water in tube

Harold Burns wrote:

Can anyone provide a brief summary of the methods by which a _flowing_
stream of water (no air content) may be deliberately caused to spin as
it progresses through a tube of about 60mm diameter and 1 metre
length.

I am considering vanes, but would like to canvas all options,
mechanical or electronics. Particularly any that would result in
higher rotational speeds.

Thank you for any advice.

Inject the incoming stream at an angle between zero and 90 degrees
exclusive to the tube's long axis. Larger angle, higher pressure,
more swirl. Momentum is conserved. Add a small fractional percent
of Polyox or other high molecular weight long chain hydrophilic
polymer to streamline flow and reduce wall friction.

Rifle the tube ID and inject at that angle. Etc.

HOWEVER... If you want *mixing* with axial propagation then swirl is
bull***. Mixing is specifically stretch and fold. Add static
mixers. Eleven should do it, possibly fewer. The blades of each
module must be orthogonal at interface. Their rims interdigitate that
way.

An engineer's first task in solving a problem is identifying the true
cause of the problem. Thanks to diversity, an engineer's zeroeth task
in solving a problem is identifying the true problem.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/lajos.htm#a2
.

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