Darcy’s Law is applicable when Reynolds number is -

Correct option is B

· Darcy’s Law:
· It describes the flow of fluid through porous media and assumes the flow is laminar, not turbulent.
· The Reynolds number (Re) must be less than 1 for laminar flow conditions in porous media to ensure Darcy's Law is valid.
· Reynolds Number:
Re=ρ⋅v⋅d/μ
Where:
· ρ: Fluid density.
· v: Velocity of fluid.
· d: Characteristic length (e.g., pore diameter).
· μ: Fluid viscosity.