lec24 - Physics 140 Fall 2007 lecture #24: 29 Nov Ch 14...

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Physics 140 – Fall 2007 lecture #24: 29 Nov Exam #3 tonight 6:00-7:30 pm Ch 9-12 Ch 14 topics: ideal fluid dynamics • volume flow rate (incompressible fluids) • Bernoulli’s equation Starry Night by V.van Gogh An ideal fluid is defined by the following set of characteristics. The flow of the fluid must be steady The velocity at any point in the flow does not change in time. incompressible The density does not change with pressure. non-viscous There are no sources of internal friction that could remove energy from the flow. irrotational An element (small piece) of the flow traces out a straight path aligned with the fluid velocity, not a helical pattern around it. Ideal fluids
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Ideal fluid flow is a simple, but useful approximation to actual fluid motion. Arrows here represent the flow velocity in a cross-sectional cutout of the pipe. The velocity is constant across the area, there is no rotation, and no drag (viscosity) near the edges of the pipe.
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lec24 - Physics 140 Fall 2007 lecture #24: 29 Nov Ch 14...

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