🍱 極端な条件下では → 水面に急段差が現れる "hydraulic jump"（跳水） https://en.wikipedia.org/wiki/Hydraulic_jump
>When liquid at high velocity discharges into a zone of lower velocity, a rather abrupt rise occurs in the liquid surface.
>The rapidly flowing liquid is abruptly slowed and increases in height,
>converting some of the flow's initial kinetic energy into an increase in potential energy,
>with some energy irreversibly lost through turbulence to heat.
🐭微分方程式🐰 とか使わずに計算してるみたい。デモ数式沢山有り過ぎて、ピーニャさん善く判らない🙈。
😼 と思ったらぁ〜〜〜 ＼(ﾟдﾟlll
The Hydraulic Jump Phenomenon - YouTube https://www.youtube.com/watch?v=UPQz2lwnk9k
💝 1:23 に答えがアッタ〜！！（見返したら wikipedia にもｱｯﾀｰ🎎!）
👹 2:44 イケニエ・タァ〜イム！！
🏄🏿♀️ 2:50 小型のｼﾞｬﾝﾌﾟでｶﾔｯｸ遊び。ｻｰﾌｨﾝ的なぁ？
(PDF) The conditions for tidal bore formation and its effect on the transport of saline water at river mouths
www.researchgate.net/publication/257847028_The_conditions_for_tidal_bore_formation_and_its_effect_on_the_transport_of_saline_water_at_river_mouths
>A method of description of water wave motion
>(which often forms as the result of manipulation of hydroengineering dam gates,
>the functioning of hydropower stations following different control schedules,
>emergency water releases, water runoff variations due to floods, etc.)
>was developed in the hydraulics, based on solving a system of two equations:
👽 迫力ｵﾏｹ： World's Largest Tidal Bore Forms in China's Qiantang River - YouTube www.youtube.com/watch?v=k6fr6GUSmAA
