Marangoni Number Surface Flow Calculator

Use one coherent SI unit system, physical state, geometry, and documented characteristic scale across every input. The slope magnitude is locally representative and sign is handled separately. Interface length and properties describe one liquid state. 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 group compares thermocapillary and diffusion scales; it does not prove instability or predict interfacial velocity. 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. Surface contamination, deformation, gravity, evaporation, boundaries, nonlinear slope, and critical criteria require separate analysis. Retain source values, units, property temperatures, geometry definitions, and uncertainty, then obtain qualified review before using the result for design or safety decisions.