Laminar Flow @ Terminal Velocity: The Perfect Suspension fo

[Bret Cahill]

Reynolds Number indicates if the flow is laminar.

In turbulent flow the fibers might be tossed end over end but not in
laminar flow.


Bret Cahill

 

In sci.physics Bret Cahill <BretCahill@peoplepc.com> wrote:

Reynolds Number indicates if the flow is laminar.

In turbulent flow the fibers might be tossed end over end but not in
laminar flow.


Bret Cahill

An object like a fiber, i.e. a long, thin object, doesn't have "A" Reynolds
number.

The Reynolds number will depend on the orientation of the fiber relative
to the air flow.

The end on Reynolds number will be very different than the broadside
Reynolds number, which will be different than Reynolds number at 45 degrees
off the end axis, ad infinitum.

The Reynolds number where the flow becomes laminar is also dependant on the
flow geometry and not a "magic number" guaranteeing laminar flow.


--
Jim Pennino

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[Bret Cahill]

From the clawing helplessly at air dept:

Get off my newsgroups

Now now now. Don't get into a snit because you never accomplished
anything in your entire life.

You stop eating those chips _right now_!"

Reynolds Number indicates if the flow is laminar.

In turbulent flow the fibers might be tossed end over end but not in
laminar flow.

Laminar flow @ terminal velocity: The perfect suspension for
orienting magnetized fibers.


Bret Cahill

 

In sci.physics Bret Cahill <BretCahill@peoplepc.com> wrote:

From the clawing helplessly at air dept:

Get off my newsgroups

Now now now. Don't get into a snit because you never accomplished
anything in your entire life.

You stop eating those chips _right now_!"

Reynolds Number indicates if the flow is laminar.

In turbulent flow the fibers might be tossed end over end but not in
laminar flow.

Laminar flow @ terminal velocity: The perfect suspension for
orienting magnetized fibers.


Bret Cahill

The only way you are going to get laminar flow with a falling long, thin
object is if it is falling end on. All other orientations are unstable.

And the only ways you can make it fall end on is either put fins on it
like an arrow or put the center of gravity well ahead of the center of
pressure like a javelin and make sure you launch in that orientation.


--
Jim Pennino

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[John Jones]

Bret Cahill wrote:

Reynolds Number indicates if the flow is laminar.

In turbulent flow the fibers might be tossed end over end but not in
laminar flow.


Bret Cahill

 

[John Jones]

Bret Cahill wrote:

 

[Bob May]

Sure did!

--
Bob May

rmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net