LATENT REFERENCES / TAG1
Reynolds Number
Original title: レイノルズ数
This reference note belongs to Tag1 in Latent References, an archive curated by Keigo Yoshida. Its archive region is Pedestrian flow simulation. The note preserves its source text and links so that readers can trace the material behind the 3D map.
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English translation of the archived note. JP shows the original text. Source links and literal code are retained; the translation does not update or independently verify the source claims.
The Reynolds number is a dimensionless number representing the ratio of “inertial force” to “viscous force” acting on a fluid. It is widely used in fluid mechanics and mechanical engineering to judge the flow state: regular “laminar flow” or irregular, swirling “turbulent flow.”
https://ja.wikipedia.org/wiki/%E3%83%AC%E3%82%A4%E3%83%8E%E3%83%AB%E3%82%BA%E6%95%B0
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レイノルズ数は、流体に働く「慣性力」と「粘性力」の比を表す無次元数です。流れの状態（規則的な「層流」か、不規則で渦を巻く「乱流」か）を判断する指標として、流体力学や機械工学で広く使用されています。
https://ja.wikipedia.org/wiki/レイノルズ数
#list
Source updated 2026-09-11 · Snapshot 2026-10-08
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