出典:Wiktionary
出典:『Wiktionary』 (2026/03/05 20:01 UTC 版)
sphericity (countable and uncountable, plural sphericities)
出典:Wikipedia
出典:『Wikipedia』 (2010/06/28 16:07 UTC 版)
Sphericity is a measure of how spherical (round) an object is. As such, it is a specific example of a compactness measure of a shape. Defined by Wadell in 1935, the sphericity, Ψ, of a particle is the ratio of the surface area of a sphere (with the same volume as the given particle) to the surface area of the particle: