...Generally, vortex filaments either terminate at a boundary or form a loop, but do not break within the fluid. From [Flow]...In particular, the curves created by connecting the rotation axes of fluid particles one after another are called vortex lines. Also, a tube created by vortex lines passing through each point of a small closed curve taken in a flow with vortices is called a vortex tube. If you take an arbitrary surface in a fluid, the fluids on both sides exert forces on each other through that surface. ... *Some of the terminology that refers to "vortex tubes" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…一般に渦糸は境界で終わるか,輪を作るかのいずれかであって,流体の中で切れることはない。 【流れ】より…とくに流体粒子の回転軸を次々に連ねてできる曲線を渦線という。また渦ありの流れの中にとった小さな閉曲線の各点を通る渦線の作る管を渦管と呼ぶ。 流体の中に任意の面をとると,両側の流体はその面をとおして互いに力を及ぼしあっている。… ※「渦管」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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