Thank you for your answers, everybody!
olivermsun, Chestermiller, would the thinning of the sheet also occur for an inviscid fluid, such as superfluid liquid helium?
Hi!
The velocity field as a function of poisition of an incompressible fluid in a uniform acceleration field, such as a waterfall accelerated by gravity can be found as follows:
The position is \vec{x}.
The velocity field is \vec{v} = \frac{d\vec{x}}{dt}.
The constant acceleration field...