How did you all figure out the friction factor? Im looking at the moody chart, and my reynolds number is too small to be on the chart. Mine range from 1.429 to 2.79 and the chart starts at 10^3.

2/5/2006 7:01:58 AM

ok, i just remembered thati had to convert my mieu value to lbm/sec, instead of hours....

2/5/2006 7:04:23 AM

ok, my reynolds number just got smaller, now its like .004 to .009

2/5/2006 7:16:33 AM

sounds like you are doing something wrong there or you water is flowing really slow.

2/5/2006 10:29:16 AM

wow those are really small reynolds numbers. mine range from about 4700-8500. i would check all ur data and make sure units cancel out and all ur conversions are correct.

2/5/2006 10:58:15 AM

btw, what line are u using on the moody chart for e/d?

2/5/2006 11:46:27 AM

what are you all getting for your pressure difference both experimental and theoretical?

2/5/2006 12:09:37 PM

the pressure difference (psi or psf) or head loss difference (in. or ft.)?

2/5/2006 12:23:01 PM

do you have to look up a new friction factor for every data point?

because they all have a different Reynolds number

plus my reynolds numbers are in the 55,000 range

[Edited on February 5, 2006 at 9:48 PM. Reason : .]

2/5/2006 9:34:39 PM

those are really high Re numbers. mine are in the 4-8*10^3 range. i would check to make sure all ur units are cancelling out correctly and all conversions were done right. Re should be unitless as well as friction factor.

2/5/2006 10:38:04 PM

you have to look up a new friction factor for every point

your Re #'s are way off it seems

2/5/2006 10:38:18 PM

im getting like 200-300 for my Re

2/6/2006 12:08:14 AM

fixed it. now im getting up to 8e3

2/6/2006 12:29:54 AM