FRICTION FACTOR TURBULENT PIPE and ROUGHNESS
I made a modelisation with the following parameters and i try to get the the skin friction factor in the lenght of the pipe this for different roughness.
3D inlet 0.015 m/s D= 1m L=20m water -> Re=15 000 symmetry pipe divided into two part.
Trying different times with :
Ks=5e-5 -> Cf=1.5e-3 f=4*Cf=6e3 Ks=2e-2 idem same value for Cf
I mean that the cavities of the roughness has an average diameter equal to 5e-5 m or 2e-2m.
whereas i expect according MOODY diagramme f=1.8e3
I try with omega model i get a different Cf but still similar for the model.
I make maybe a misunderstanding with Ks;
If somebody would have a suggestion i would be very helpful.
Re: FRICTION FACTOR TURBULENT PIPE and ROUGHNESS
not helpful but grateful thanks in advance;
sorry little mistake
Ks=5e-5 -> Cf=1.5e-3 f=4*Cf=6e(-)3
Ks=2e-2 idem same value for Cf
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