👉 The wn fluid, or water-normalized flow number, is a dimensionless parameter used in fluid dynamics to characterize the flow regime of water in pipes or channels, particularly when the Reynolds number (Re) is low. It is defined as Re_wn = (ρVD)/μ, where ρ is the fluid density, V is the average flow velocity, D is the pipe diameter, and μ is the dynamic viscosity of water. When Re_wn is less than 2000, the flow is generally considered laminar, characterized by smooth, parallel layers of fluid with minimal mixing. This parameter helps engineers and scientists predict flow behavior, pressure drops, and heat transfer characteristics in water-based systems efficiently.
