Chemical Engineering - Chemical Engineering Basics - Discussion
Discussion Forum : Chemical Engineering Basics - Section 1 (Q.No. 4)
4.
Friction factor for fluid flow in pipe does not depend upon the
Discussion:
39 comments Page 4 of 4.
Subhra Kanti Dhar said:
1 decade ago
For laminar flow in pipe f=16/Re. & for turbulent flow in pipe f=0.0791*Re^-0.25. And Re depends upon fluid density, dynamic viscosity, dia of the pipe, fluid velocity. So Re does not depend upon length. That is why f is independent of length.
Hardik sharma said:
1 decade ago
To calculate the velocity (if it is not given) by continuity Eqn. Mass flow is required so I think it does not depend on roughness.
Hardik said:
1 decade ago
As for Calculating the Fanning Factor density and viscosity required. and then friction factor is 2*fanning factor*length*square of velocity/Dia of Pipe.
SO ITS DEPEND ON LENGTH.
SO ITS DEPEND ON LENGTH.
Sachin said:
1 decade ago
As F= 16/Nre.
And Nre= density*v*l/viscosity.
So it depend on length and not depend upon mass flow rate.
And Nre= density*v*l/viscosity.
So it depend on length and not depend upon mass flow rate.
(1)
Anjali said:
1 decade ago
But one Formula says that it depends on length.
dh = (4*f)* (l/d)* (u2/density*g)
Than...?
dh = (4*f)* (l/d)* (u2/density*g)
Than...?
Thabasum said:
1 decade ago
hfs = (4flv^2)/2d it's simplifies.
f = (hfs*2d)/(lv^2).
f is doesn't depends on l and v.
f = (hfs*2d)/(lv^2).
f is doesn't depends on l and v.
Abhilash said:
1 decade ago
We can calculate it by equation 16/Re. where Re is the Reynolds no. and as we know that Re = density*vel*dia/viscocity.
Giri said:
1 decade ago
dp=4flv2(density)/2g.
So it should depend upon length.
So it should depend upon length.
Priti singh said:
1 decade ago
Friction factor f is entirely dependent on the nature of the material so roughness is a measure so as density and viscosity of the fluid passing through the pipe.
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