The fluid is isotropic: it looks the same in every direction.The experimenter then forces the fluid to pass through a metal grid at a certain speed.

 
  • 靜止的液體具有均向性,也就是各個(gè)方向的運動(dòng)速率都相同,接著(zhù)實(shí)驗者迫使液體以一定速率通過(guò)金屬格柵。
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