Question

Water flows at a speed of 6 cm s−1 through a tube of radius 1 cm. Coefficient of viscosity of water at room temperature is 0.01 poise. Calculate the Reynolds number. Is it a steady flow?

Answer 1

The Reynolds number is 120.

Explanation:

Given that,

Speed = 6 cm/s

Radius = 1 cm

Coefficient of viscosity = 0.01

We need to calculate the Reynolds number

Using formula of Reynolds number

$R=\dfrac{v\times\rho\times D}{\eta}$

Where, v = speed

D = diameter

$eta$ = viscosity

$R=\dfrac{6\times10^{-2}\times1000\times2\times10^{-2}}{0.01}$

$R=120$

Hence, The Reynolds number is 120.

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Topic : Reynolds number

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