...When it occurs in a vortex, it becomes a long, thin string. The cavitation number σ, defined as σ = ( p ∞ - p v )/(ρ U 2 /2), is used as an index to indicate the likelihood of cavitation occurring, and the smaller σ is, the more likely cavitation is to occur. Here, p ∞ is the static pressure of the general flow of the liquid, p v is the vapor pressure of the liquid, ρ is the density of the liquid, and U is the flow velocity of the general flow of the liquid. ... *Some of the terminology that refers to "cavitation number" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…渦中に発生するときには細長いひも状になる。キャビテーションの発生しやすさを示す指数として,σ=(p∞-pv)/(ρU2/2)で定義されるキャビテーション数σが用いられ,σの小さいほどキャビテーションは発生しやすい。ここでp∞は液体の一般流の静圧,pvは液体の蒸気圧,ρは液体の密度,Uは液体の一般流の流速である。… ※「キャビテーション数」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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