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Chapter:
Laminar-Pipe-Flow
A total of 12 litres per second of oil is pumped through two pipes in parallel, one 12 cm in diameter and or 10 cm in diameter, both pipes being 1000 metres long. The specific gravity of oil is 0.97 and kinematic viscosity 9 `(cm)^2` per second. Calculate flow rate through each pipe and power of pump.
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This Chapter Laminar-Pipe-Flow consists of the following topics
A pipe 60 mm diameter and 450 m long slopes upwards at 1 in 50. An oil of viscosity `0.9 (Ns)/m^2` and specific gravity 0.9 is required to be pumped at the rate of 5 litres/sec.
- (i) Is the flow laminar?
- (ii) What pressure difference is required to attain this condition?
- (iii) What is the power of the pump required assuming an overall efficient of 65%?
- (iv) What is the centre-line velocity and the velocity gradient at pipe wall?
