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A research experiment requires that you have a laminar air flow of 20 ° C per...

A research experiment requires that you have a laminar air flow of 20 ° C per a tube 10 cm in diameter with a Reynolds of 40,000. What is the maximum speed that should be expected? What could the pressure drop be along a horizontal length 10m flow developed? What would be the input length? Use ρ = 1.2 kg / m3 .

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Answer #1

The Reynold's number is given by the formula-

The dynamic viscoity of air at 20 C is

This is the average speed.

Maximum speed for laminar flow is given by-

The pressure drop per 10 m length is given by-

The entry length is given by-

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