👉 Reynolds Math, named after Osborne Reynolds, is a fundamental concept in fluid dynamics that describes the behavior of fluids (liquids and gases) under various conditions, particularly focusing on the transition from laminar to turbulent flow. It introduces the Reynolds number (Re), a dimensionless quantity that predicts flow patterns by comparing inertial forces to viscous forces within a fluid. The Reynolds number is calculated using the formula Re = (ρvL)/μ, where ρ is the fluid density, v is the flow velocity, L is a characteristic linear dimension (like pipe diameter), and μ is the dynamic viscosity. When the Reynolds number is low, flow tends to be laminar (smooth and orderly), while high Reynolds numbers indicate turbulent flow (chaotic and mixed). This framework helps engineers and scientists understand and predict fluid behavior in a wide range of applications, from pipe flow to atmospheric dynamics.
