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Oil of specific gravity 0.82 is pumped through a horizontal pipeline 15mm in diameter and 3Km long at the rate of 0.015m /s.
written 6.7 years ago by gravatar for teamques10 teamques10 ★ 70k modified 3.8 years ago by gravatar for pedsangini276 pedsangini276 • 4.8k

The pump has an efficiency of 68% requires 7.5 KW to pump the oil. (i) What is the dynamic viscosity of oil? (ii) is the flow laminar?

Subject: Fluid Mechanics 2

Difficulty: Hard

Marks: 10M
fluid mechanics
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written 6.7 years ago by gravatar for teamques10 teamques10 ★ 70k modified 6.6 years ago by gravatar for yashbeer yashbeer ★ 11k

Given : Specific gravity = 0.82 of oil.

$\therefore \text{density of oil } \rho = 0.82 \times 1000 = 820 kg/m^3$

Dia. of pipe D = 0.015m (D = 15mm)

Length L = 3 km = 3000 m.

discharge Q = 0.015 $m^3/s$

Power = 7.5 kw $ = 7.5 …

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