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mezya [45]
4 years ago
12

A 100-mm pipe is used to transfer oil from a reservoir to a 100- liter tank. It takes 45 minutes to fill the tank with oil that

has viscosity and density of 0.005 Pas and 900 kg/m3, respectively Determine a. The volume flow rate of oil b. Mean velocity in the pipe; c. Reynolds number, and d. The maximum velocity in the pipe
Physics
1 answer:
Firlakuza [10]4 years ago
7 0

Explanation:

Given that,

Diameter =100 mm

Volume = 100 liter

Time = 45 min

Viscosity = 0.005 Pas

Density = 900 kg/m³

(a). We need to calculate the volume flow rate of oil

Using formula of flow rate

q=\dfrac{V}{t}

Put the value into the formula

Q=\dfrac{0.1}{2700}

Q=3.7\times10^{-5}\ m^3/s

The volume flow rate of oil is 3.7\times10^{-5}\ m^3/s

(b). We need to calculate the mean velocity in the pipe

Using formula of mean velocity

v=\dfrac{Q}{A}

v=\dfrac{Q}{\dfrac{\pi}{4}\times d^2}

Put the value into the formula

v=\dfrac{3.7\times10^{-5}}{\dfrac{\pi}{4}\times(100\times10^{-3})^2}

v=4.7\times10^{-3}\ m/s

The mean velocity in the pipe is 4.7\times10^{-3}\ m/s.

(c). We need to calculate the Reynolds number

Using formula of the Reynolds number

R_{e}=\dfrac{\rho v d}{\mu}

Put the value in to the formula

R_{e}=\dfrac{900\times4.7\times10^{-3}\times100\times10^{-3}}{0.005}

R_{e}=84.6

The Reynolds number is 84.6.

(d). We need to calculate the maximum velocity in the pipe

Using formula of maximum velocity

V_{max}=2v_{avg}

Put the value into the formula

v_{max}=2\times4.7\times10^{-3}

v_{max}=9.4\times10^{-3}\ m/s

The maximum velocity in the pipe is 9.4\times10^{-3}\ m/s

Hence, This is the required solution

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