> > Hi Folks,
> > What are your thoughts on simple (ish ) ways of conditioning
> > the output of a fan to give a nice smooth air flow for testing an
> > ultrasonic anemometer? I'm not too fussed about absolute speed
> > accuracy,
> > it's more having a nice smooth source to test the stability of the
> > direction sensing that I'm interested in.
> >
> > Something like the Dyson Air Multiplier:
> > =A0http://www.dyson.co.uk/store/fans.asp
> > =A0looks like it might make an off the shelf solution but might be
> > difficult to get bought (or to keep hold of once the office sees it!
> =A0).
> >
> > Tube full of straws to induce laminar flow? =A0Just a long tube to let
> > things "settle down" =A0after the blades?
> >
> > Any input welcome :)

Tube full f straws is probably the way to go. It seems to be the common way=
 that experimenters produce laminar water flow for those fancy fountains wh=
ere squirt of water acts like rods and don't spray everywhere. Try some sea=
rch terms looking for these things (I can't remember what terms I used when=
 I looked some time back).



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