- #1
billybob70
- 11
- 0
hopefully this will be my last question...
My textbook says friction factor = 64/reynold's number for laminar flow.
But it doesn't say how this equation is derived. does anyone know where this equation comes from?
is it an approximation (i.e. will be more accurate for certain Re's and less accurate at others), or is it exact?
Thanks.
My textbook says friction factor = 64/reynold's number for laminar flow.
But it doesn't say how this equation is derived. does anyone know where this equation comes from?
is it an approximation (i.e. will be more accurate for certain Re's and less accurate at others), or is it exact?
Thanks.