Transcription of CHAPTER 4 FLOW IN CHANNELS - MIT OpenCourseWare
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CHAPTER 4 FLOW IN CHANNELS - MIT OpenCourseWare
CHAPTER 4 FLOW IN CHANNELS INTRODUCTION 1 Flows in conduits or CHANNELS are of interest in science, engineering, and everyday life. Flows in closed conduits or CHANNELS , like pipes or air ducts, are entirely in contact with rigid boundaries. Most closed conduits in engineering applications are either circular or rectangular in cross section. open - channel flows, on the other hand, are those whose boundaries are not entirely a solid and rigid material; the other part of the boundary of such flows may be another fluid, or nothing at all.
Figure 4-3. Sketch of a rectangular open channel of width b, to aid in the definition of the hydraulic radius. Figure 4-4. The wetted perimeter of a straight open channel flow. 11 To generalize Equation 4.1 to a channel of arbitrary cross-section shape, assume that the area of the cross section is A and the wetted
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