2 5 decimal

&[DATE] &[TIME] - &[FILENAME]

D 1 m * :

U 10 m s / * :

υ 106 -^m 2^s / * :

ε 0.1 mm * :

Re U D * υ / :

Ω π D 2^* 4 / :

Q Ω U * :

Q 7.85 m 3^s / *

ε D / 1104 -^*

Re 1107^*

Ω 0.79 m 2^*

f.Haaland 1.8 - (ε D / 3.7 / (1.11^6.9 Re / + 10 log * (2 -^:

f.Haaland 1.22 102 -^*

f.Colebrook 1 f sqrt / 2 - (ε D / 3.7 / 2.51 Re f sqrt * / + 10 log * ≡ f 010 f.Haaland * solve :

f.Colebrook 6.08 104 -^* 1.22 102 -^* 21 mat

testing Colebrook roots

2 ε D / 3.7 / 2.51 Re f.Colebrook 1 el sqrt * / + 10 log * 1 f.Colebrook 1 el sqrt / + 31.69

2 ε D / 3.7 / 2.51 Re f.Colebrook 2 el sqrt * / + 10 log * 1 f.Colebrook 2 el sqrt / + 1.88 106 -^* -