Stokes number, St

https://doi.org/10.1351/goldbook.S06029
Sometimes referred to as the inertial parameter; it is an index of the impactability of an aerosol particle. It is defined by the equation: St=2 τ (Vt−νt) Dp where Dp is the diameter of a small drop, Vt−νt is the difference in fall velocities of the drop and aerosol particles and τ is the characteristic relaxation time of a particle.
Source:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2216 [Terms] [Paper]
Citation: 'Stokes number' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S06029 RIS BibTex EndNote
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