RussellMc <apptechnz <at> gmail.com> writes:

>=20
> > I'm looking for insight on measuring water flow rate inexpensively.
>=20
> "Rate" may mean volume per second or velocity. The former is more
> rigorous but the latter not unknown.
Linear velocity, at least for pipe flow is a non-descriptive term by itself=
..  Is
it an average velocity, velocity in the center or at a certain distance fro=
m
pipe walls?  For a round pipe, linear velocity at the wall will be 0, in th=
e
center ~2x average velocity (volumetric rate/cross-section area).  This, of
course, assume newtonian liquid such as water and a laminar flow.=20

Probably better description is volumetric flow and pipe geometry, at least
cross-section.=20

On the other hand, I might be smoking my microfluidics weed and be complete=
ly
wrong about the macrofluidic flow.  This brings us to already described set=
 of
questions.

Sergey Dryga
http://beaglerobotics.com

--=20
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