Discussion Forum

A horizontal pipeline carrying gasoline has a cross-sectional diameter of 5 mm. If the viscosity and density of the gasoline are $6 \times 10^{-3}$  Poise and 720 kg/m³ respectively, the velocity after which the flow becomes turbulent is 

Answer:

Explanation:

 Given,

 Diameter of pipe (d)= 5mm= $5 \times 10^{-3}$ m

 Density of gasoline ($\rho$)=720 kg/m³

 Viscosity  of gasoline ($\eta$)= $6 \times 10^{-3}$ Poise

 We know that,

 $V_{c}=\frac{\eta}{\rho d}=\frac{6 \times 10^{-3}}{720 \times 5 \times 10^{-3}}$

$=\frac{6 \times 10^{-3}}{3600\times10^{-3}}=\frac{1}{600}=\frac{1}{6}\times10^{-2}$

   $=1.66 \times 10^{-3} m/s$