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Laminar-Pipe-Flow
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 rate of 5 litres/sec.
- (i) Is flow laminar?
- (ii) What pressure difference is required to attain this condition?
- (iii) What is power of pump required assuming an overall efficient of 65%?
- (iv) What is centre-line velocity and velocity gradient at pipe wall?
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 rate of 5 litres/sec.
- (i) Is flow laminar?
- (ii) What pressure difference is required to attain this condition?
- (iii) What is power of pump required assuming an overall efficient of 65%?
- (iv) What is centre-line velocity and velocity gradient at pipe wall?
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This Chapter Laminar-Pipe-Flow consists of the following topics
Oil of specific gravity 0.82 is pumped through a horizontal pipeline 150 mm in diameter and 3 km long at the rate of ` 0.015 m^3/s`. The pump has an efficiency of 68% and requires 7.5 kW to pump the oil. (i) What is the dynamic viscosity of the oil? (ii) Is the flow laminar?
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 rate of 5 litres/sec.
- (i) Is flow laminar?
- (ii) What pressure difference is required to attain this condition?
- (iii) What is power of pump required assuming an overall efficient of 65%?
- (iv) What is centre-line velocity and velocity gradient at pipe wall?
