physics 202 lecture notes - pccspot.pcc.edu/~dulrich/2013p202/2013p202ln03.pdf · pascal’s...
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Fluids
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Pascal’s principle: any pressure change will flow through the entire fluidequally
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Archimedes’ principle: vertical pressure differentials provides the force ofbuoyancy
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Pressure differentials cause flow; steady flow moves along streamlines ofcurrent
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The steady flow of an ideal fluid is both incompressible and non-viscous
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Bernoulli’s equation describes the pressure differentials in a ideal fluid thatis flowing
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Viscosity is fluid friction; leads to air drag and requires extra pressure forflow
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Turbulence driven by speed and size of the object, viscosity and density ofthe fluid
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Navier-Stokes equations go beyond Bernoulli, but are very difficult to solve
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