Comments by "Mark Armage" (@markarmage3776) on "Dr Ben Miles" channel.

  1. So the reason for the spin is the non-uniform velocity of the flows in each pipe. So the next step would be to replace the fluid with another fluid that has a lower friction coefficients, or reduce the angle bending of the tube. Such changes shall result in a lower rate of spin, since a more uniform velocity profile on both tube leads to a smaller difference, and therefore less rotation.
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