Taking each of our tasks from today's session with Fred, focusing our research more directly on airplanes I have chosen to further our research looking in to the Swiss mathematician's statement 'Lift is created when moving air above a wing creates lower pressure'.
Daniel Bernoulli (8 February 1700 – 8 March 1782) was a Dutch-swiss mathematician. He is particularly remembered for his applications of mathematics to mechanics. Bernoulli's principle is of critical use in aerodynamics.
In fact, there are different forms of the Bernoulli equation for different types of flow.Bernoulli's principle can also be derived directly from Newton's 2nd law. If a small volume of fluid is flowing horizontally from a region of high pressure to a region of low pressure, then there is more pressure behind than in front. This gives a net force on the volume, accelerating it along the streamline.
Bernoulli's principle can be used to calculate the lift force on an airfoil if the behaviour of the fluid flow in the vicinity of the foil is known. For example, if the air flowing past the top surface of an aircraft wing is moving faster than the air flowing past the bottom surface, then Bernoulli's principle implies that the pressure on the surfaces of the wing will be lower above than below. ernoulli's principle does not explain why the air flows faster past the top of the wing and slower past the underside.
Many explanations for the generation of lift (on airfoils, propeller blades, etc.) can be found; but some of these explanations can be misleading, and some are false. This has been a source of heated discussion over the years. In particular, there has been debate about whether lift is best explained by Bernoulli's principle or Newton's law of motion. Modern writings agree that both Bernoulli's principle and Newton's laws are relevant and either can be used to correctly describe lift.
