Correct Answer - Option 1 : Viscous forces are very strong as compared to inertial forces
Explanation:
(i) The dimensionless Reynolds number is an important parameter in the equations that describe whether fully developed flow conditions lead to laminar or turbulent flow.
(ii) The Reynolds number is the ratio of the inertial force to the Viscous force of the fluid: how fast the fluid is moving relative to how viscous it is, irrespective of the scale of the fluid system.
(iii) Laminar flow generally occurs when the fluid is moving slowly or the fluid is very viscous. As the Reynolds number increases, such as by increasing the flow rate of the fluid, the flow will transition from laminar to turbulent flow at a specific range of Reynolds numbers, the laminar–turbulent transition range depending on small disturbance levels in the fluid or imperfections in the flow system.
(iv) If the Reynolds number is very small, much less than 1, then the fluid will exhibit Stokes, or creeping, flow, where the viscous forces of the fluid dominate the inertial forces.
