(a) Oil, with density ρ= 900 kg/m3, and kinematic viscosity υ=0.00001m2/s, flows at the rate of 0.2m3/s through 500m of a cast iron pipe of diameter d=200mm. Using this information, determine:
(i) the frictional head loss through the pipe;
(ii) the pressure drop if the pipe slopes down 10o in the flow direction.
(b) Three such cast iron pipes, whose dimensions are given in the Table below, are now laid in parallel. The total flow rate is 200 m3/hour of water at 20oC.
(i) What is the flow rate in each pipe?
(ii) What is the pressure drop across the system?
|
Pipe No
|
Length (m)
|
Diameter (cm)
|
|
1
|
800
|
12
|
|
2
|
600
|
8
|
|
3
|
900
|
10
|