Question

Streamline flow is more likely for liquids with

• A. high viscosity.
• B. low density.
• C. high density.
• D. low viscosity.

Answer 1

Answer: (A), (B)

low density.

As the Reynold’s number is given by

$R=\frac{\rho .V.D}{\mu }$ Where $\rho$ is the density of the fluid, $\mu$ is the viscosity of the fluid and the D is the characteristic dimension.

For streamline flow, Reynolds’s number should be less for the fluid, therefore

$R\downarrow =\frac{\rho \downarrow }{\mu \uparrow }$

Final Answer: (b), (c)