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  1. L

    Rotating fluid, curl and suspended object rotation

    .... okay nevermind: tl;dr from wikipedia's 'intuitive interpretation' of curl: ang. velocity of the ball is 'half' the curl >.>
  2. L

    Rotating fluid, curl and suspended object rotation

    I'm trying to figure this out. Say you have a cylinder of perfectly rotating fluid, so that it's velocity field is: F(x,y,z) = yi - xj which has curl -2k assuming there is 'infinite' fluid drag and you have an 'infinitely' light ball which you place into the fluid at any point (let's say...
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