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 3 of 4.
Moges said:
8 months ago
Friction is the resistance of slipping a fluid to fluid particles or layers and its boundary.
The factors considered are the roughness of the pipe, viscosity and density of the fluids, velocity or flow rate of the fluid and diameter of the pipe.
The factors considered are the roughness of the pipe, viscosity and density of the fluids, velocity or flow rate of the fluid and diameter of the pipe.
S.K. said:
1 decade ago
Can someone please explain how friction factor depends on mass flow rate of the fluid?
Giri said:
1 decade ago
dp=4flv2(density)/2g.
So it should depend upon length.
So it should depend upon length.
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.
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.
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...?
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.
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.
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.
Narendra said:
1 decade ago
F depends upon Re and Re doesn't depend upon length and roughness depend upon dia only so A.
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