Laminar flow experiment

[willhaney]

Laminar flow experiment (http://www.youtube.com/watch?v=p08_KlTKP50)

[Majortomski]

Absolutely in creadible!!! So the crank and the fluid were rotating at the same speed at all times??? ;-)

[Bilbobaker]

That seems completely unreal.

[Accu157]

whoa that is awesome! :D

[LVsoaring]

I'm not as dumb as my brother-in-law looks. I aint buying that........

[Bilbobaker]

So how we all gonna get to the bottom of this then?

[olmod]

Will it do the same for 10 turns :confused: :D

[peterp1964]

Will it do the same for 10 turns :confused: :D

it will do the same for dozens of turns...the key here is the slow turning of the crank
and the high viscosity (the drops and the bulk fluid have the same viscosity) along
with a negligible diffusion coefficient. What looks like homogeneous mixing from the
side is an illusion...if you look from the top you see one armed spirals for each
dye (they are not placed at the same radial location). Reversing the crank rewinds the
spiral. This was first published in 1960 and since then it is one of the typical
demonstrations used in fluid mechanics courses to motivate the study of the
"creeping approximation" (which neglects inertial terms due to the slow motion of
the crank) applied to the Navier-Stokes equations to study incompressible viscous
flow in some parameter regimes.

Peter

[eflightray]

Fascinating.

After doing consecutive rolls and spreading a model over the grass, is it possible to reverse it and the model goes back together though?

[willhaney]

Fascinating.

After doing consecutive rolls and spreading a model over the grass, is it possible to reverse it and the model goes back together though?Ahhh, if it were only that easy. :D

Will :)

http://www.willhaney.com/rcgroups/fwiw/(S(fmgkch45yd1qjli3yt4dweme))/Default.aspx (http://www.willhaney.com/rcgroups/home)

[Tweener]

it will do the same for dozens of turns...the key here is the slow turning of the crank
and the high viscosity (the drops and the bulk fluid have the same viscosity) along
with a negligible diffusion coefficient. What looks like homogeneous mixing from the
side is an illusion...if you look from the top you see one armed spirals for each
dye (they are not placed at the same radial location). Reversing the crank rewinds the
spiral. This was first published in 1960 and since then it is one of the typical
demonstrations used in fluid mechanics courses to motivate the study of the
"creeping approximation" (which neglects inertial terms due to the slow motion of
the crank) applied to the Navier-Stokes equations to study incompressible viscous
flow in some parameter regimes.

Peter ;)

http://www.cheers-becker.de/c_cliff_02.JPG

[Bilbobaker]

Snicker :p

[Bill Ervin]

Twisted, stupid, funny stuff here. My favorite kind.


http://www.willitblend.com/videos.aspx?type=unsafe&video=bic