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Unformatted text preview: eality. Some explicit numerical algorithms have been developed by Ormsbee and Wood . Network
analysis is quite useful for real water distribution systems if well calibrated with the
actual system head-loss data. 6.9 Experimental Duct Flows:
Diffuser Performance The Moody chart is such a great correlation for tubes of any cross section with any
roughness or flow rate that we may be deluded into thinking that the world of
internal-flow prediction is at our feet. Not so. The theory is reliable only for ducts of
constant cross section. As soon as the section varies, we must rely principally upon experiment to determine the flow properties. As mentioned many times before, experiment is a vital part of fluid mechanics.
Literally thousands of papers in the literature report experimental data for specific
internal and external viscous flows. We have already seen several examples:
6. Vortex shedding from a cylinder (Fig. 5.2)
Drag of a sphere and a cylinder (Fig. 5.3)
Hydraulic model of an estuary (Fig. 5....
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This note was uploaded on 10/27/2009 for the course MAE 101a taught by Professor Sakar during the Spring '08 term at UCSD.
- Spring '08