Hopefully a very simple question for someone that knows; We know from Bernoulli's principle that an area of high velocity creates an area of low pressure and vice versa. My question is how is this created?
It is a manifestation of conservation of energy. And to be more accurate and descriptive, Bernoulli's principle states that the total pressure (ie, the energy) is constant along a streamline. So when you have an area of higher velocity, you get a higher velocity pressure - and by conservation of energy, the static pressure must be lower.
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