Unformatted text preview: The Lehigh River, White Haven, Pennsylvania.
Open channel flows are everywhere, often rough
and turbulent, as in this photo. They are analyzed
by the methods of the present chapter. (Courtesy of
Dr. E. R. Degginger/Color-Pic Inc.) | v v 658 | e-Text Main Menu | Textbook Table of Contents | Study Guide Chapter 10
Open-Channel Flow Motivation. The duct flows of Chap. 6 were driven by a pressure difference between
the ends of the duct. Such channels are closed and full of fluid, either gas or liquid.
By contrast, an open-channel flow is liquid only and is not full; i.e., there is always a
free surface exposed to ambient pressure. The basic balance of forces is between gravity (fluid weight) and friction.
Practical open-channel problems almost always concern water as the relevant fluid.
The flow is generally turbulent, due to its large scale and small kinematic viscosity,
and is three-dimensional, sometimes unsteady, and often surprisingly complex due to
geometric effects. This chapter presents some simple engineering theories and correlations for steady flow in straight channels of simple geometry. Many of the...
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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