…The speed of all motions other than translational motion is a suitable combination of the velocity gradient at the center of the sphere. Twice the angular velocity Ω, ω = 2Ω, is called vorticity, and a flow that does not have such rotation is called a flow without vortices, and a flow in which such rotation is distributed is called a flow with vortices. In particular, the curves created by connecting the rotation axes of fluid particles one after another are called vortex lines. … *Some of the terminology used to describe "vortex-containing flow" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…並進運動以外の運動の速さはいずれも球の中心での速度のこう配を適当に組み合わせたものである。 角速度Ωの2倍,ω=2Ωを渦度と呼ぶが,そのような回転をもたない流れを渦なしの流れ,それが分布した流れを渦ありの流れという。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。… ※「渦ありの流れ」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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