Water Flow in a Pipe

This model illustrates **Bernoulli's principle**, which offers a seemingly counterintuitive explanation of the relationship between the speed of a fluid and its pressure. Bernoulli's principle states that within a horizontal flow of fluid, points where the fluid moves faster will experience lower pressure than points where the fluid moves more slowly. In a horizontal water pipe with varying diameters, areas where the water flows rapidly will be subject to lower pressure than areas where the water flows more slowly. Bernoulli's principle can be applied to many everyday phenomena, even though real fluids are not entirely inviscid, and even small viscosity can significantly affect the flow.