For the fluids people here:

When calculating a Reynolds number, what units are the input terms supposed to be in?

1/29/2007 7:59:15 AM

whoops. nm.

[Edited on January 29, 2007 at 8:52 AM. Reason : i/o]

1/29/2007 8:47:14 AM

((length/time)(length))/(length^2/time)

1/29/2007 8:50:31 AM

That's it? Just use meters?

EDIT: nm, I think I figured out what I was doing wrong

(millimeters != meters, dumbfuck)

[Edited on January 29, 2007 at 10:04 AM. Reason : .]

1/29/2007 10:04:47 AM

1. you should at the very least have a text book that tells you this

2. if you do not have a text book for your fluids class, that alone is infinite times more stupid than this thread

Reynolds Numbers are the least of your worries

1/29/2007 5:52:07 PM

1/29/2007 8:15:44 PM

hey
i not sure but whats this about. the Reynolds Number does not have units its a number.

2/5/2007 12:06:05 PM

^

Quote :

"When calculating a Reynolds number, what units are the input terms supposed to be in?"

input terms, my dear friend, not the resulting number

2/5/2007 12:09:22 PM

Quote :

"1. you should at the very least have a text book that tells you this 2. if you do not have a text book for your fluids class, that alone is infinite times more stupid than this thread Reynolds Numbers are the least of your worries"

2/5/2007 6:48:21 PM

Quote :

"i not sure but whats this about. the Reynolds Number does not have units its a number. "

LOL, great grammar.

2/5/2007 8:12:47 PM

pretty sure unitless

2/5/2007 9:15:14 PM

I'm not sure who's kidding and who's seroius here..... but Reynolds number is a number and therefore unitless..... Aficionado showed it correctly

2/5/2007 9:17:41 PM

This thread's not dead yet?

Anyway, INPUT units, not final units. I'm aware that Re is unitless.

2/7/2007 6:52:57 AM

density[mass/volume]*Velocity[length/time]*diameter[length]/viscosity[mass/(length*time)]

so in english units

[lbm/ft^3]*[ft/s]*[ft]/[lbm/(ft*s)]

or in metric

[kg/m^3][m/s][m]/[N*s/m^2)

those should all cancel out


[Edited on February 7, 2007 at 9:45 AM. Reason : ]

2/7/2007 9:43:04 AM

fuck rho and mu

use nu

2/7/2007 9:45:18 AM

Quote :

"density[mass/volume]*Velocity[length/time]*diameter[length]/viscosity[mass/(length*time)]"

Characteristic Dimension

2/7/2007 8:28:45 PM

assuming we're dealing with a pipe

2/7/2007 9:34:54 PM

reynolds number has no units.....

2/10/2007 7:49:03 PM

did you even read the fucking thread

2/10/2007 11:48:18 PM

basically just make sure the units cancel out. you could use lightyears if you wanted to.

[Edited on February 12, 2007 at 4:03 PM. Reason : wow. didn't realize this was a stilletto thread. weird.]

2/12/2007 3:41:26 PM

i dont think he cares about Reynolds numbers any longer.

2/12/2007 4:16:09 PM

quick lets all bttt stiletto threads and muse about them

2/12/2007 7:53:13 PM