Oil (specific gravity of 0.80 and a viscosity of 0.42 lbf/ft2) at a temperature of 80 f flows through two separate pipes 10 and 12 inches in diameter. if the mean velocity of flow in the 12 in. pipe is 6 ft/s, the velocity of flow in the 10 in pipe will be:

The velocity of flow in 10in pipe is 4.16 ft/s.

Explanation:

Given that

Specific gravity = 0.8

Viscosity =0.00042

For pipe 1

For pipe 1

If we assume that flow in the both pipe is laminar

For laminar flow through circular pipe

So same pressure drop we can say that

So the velocity of flow in 10in pipe is 4.16 ft/s.

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