Dean Number Curved Flow Calculator

Use one coherent SI unit system, physical state, geometry, and documented characteristic scale across every input. Reynolds number and diameter use the same flow convention. Curvature radius is measured to the passage centerline. Confirm whether each property belongs to the fluid, solid, interface, particle, or transported quantity named by the formula. Mixed conventions can produce a plausible number whose physical meaning is wrong.

The result combines inertia with curvature scale; it does not prove secondary-flow onset or pressure loss. A dimensionless group compares selected mechanisms under a stated model; it does not prove a regime, transition, instability, similarity, or safe design. Geometry, boundary conditions, property variation, measurement uncertainty, and the validity range of downstream correlations still require separate review.

No. This educational calculator performs displayed arithmetic on supplied SI values; it is not simulation, experimental validation, a correlation selector, material data, or engineering approval. Cross-section shape, bend angle, roughness, developing flow, transition criteria, and empirical pressure loss require separate review. Retain source values, units, property temperatures, geometry definitions, and uncertainty, then obtain qualified review before using the result for design or safety decisions.