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.
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.
Dhanaji said:
6 years ago
Oh really. It should depend on length by looking at the formula we can say this. Also by logic, more the length more will be the friction. Please correct me if I am wrong. Thanks.
(6)
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.
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.
Zakawat said:
1 decade ago
Re = flv2/2gD.
From above relation we can conclude that friction factor depend upon length of pipe. But f is independent of mass flow rate a/c to me.
From above relation we can conclude that friction factor depend upon length of pipe. But f is independent of mass flow rate a/c to me.
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.
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.
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)
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.
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.
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