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 2 of 4.
M. Aaisha banu said:
6 years ago
In turbulent flow the friction formula also based length of the pipe. Then how should it be independent on the length? Please explain.
(2)
Ajama said:
7 years ago
Thanks all for explaining.
Ritik gupta said:
7 years ago
It does not depend upon length but its depend upon flow rate because if the flow rate is high then friction is less.
So, A is the right answer.
So, A is the right answer.
Ivana said:
7 years ago
@Laxman.
When the length increases friction losses increase. But f is independent of length.
When the length increases friction losses increase. But f is independent of length.
Laxman said:
8 years ago
Pipe roughness; fluid density & viscosity and mass flow rate of fluid if these parameters u alter, frictional losses of particular will change. Isn't it? What is going to do by increasing or decreasing length.
Sushil said:
8 years ago
@ALL.
Here the length given may refers to the (entrance length) afterwards the flow becames fully developed and hence friction factor start existing.
Here the length given may refers to the (entrance length) afterwards the flow becames fully developed and hence friction factor start existing.
Prem said:
9 years ago
They asked f for the pipe.
f equals 16/re.
for a pipe Reynolds no. diameter is considered.
re for a flat plate length is considered.
So for a pipe, since diameter is considered to calculate Reynolds no.
Pipe length is not required.
Friction factor is independent of pipe length.
f equals 16/re.
for a pipe Reynolds no. diameter is considered.
re for a flat plate length is considered.
So for a pipe, since diameter is considered to calculate Reynolds no.
Pipe length is not required.
Friction factor is independent of pipe length.
Suraj singh said:
9 years ago
When the flow of liquid then in pipe flow work below the ATM pressure hence friction formula says depend on length but not a roughness because roughness is different for different material.
Raghu said:
9 years ago
For laminar flow friction factor doesn't depend on length & diameter of the pipe.
But in the turbulent flow, it definitely depends on length and diameter because friction factor is a relative shear stress between fluid layers.
But in the turbulent flow, it definitely depends on length and diameter because friction factor is a relative shear stress between fluid layers.
Saswata said:
9 years ago
f = 16\ Re.
-> Re = Dvd\vicosity.
-> Re = Dvd\vicosity.
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