Model study of supercritical flow channel transition for Nichols Creek, Kenedy, Texas
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Model study of supercritical flow channel transition for Nichols Creek, Kenedy, Texas by D. K. McCool

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Published in New Orleans .
Written in English


Book details:

Edition Notes

SeriesU.S. Agricultural Research Service. Southern Region. ARS-S-11
The Physical Object
Pagination28 p. illus.
Number of Pages28
ID Numbers
Open LibraryOL25594682M

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- Buy Model Study of Supercritical Flow Channel Transition for Nichols Creek, Kenedy, Tex (Classic Reprint) book online at best prices in India on Read Model Study of Supercritical Flow Channel Transition for Nichols Creek, Kenedy, Tex (Classic Reprint) book reviews & author details and more at Free delivery on qualified : D K McCool. The present paper is an attempt to analyze supercritical flow in an inclined channel 0 The Method of Characteristics which is explained in detail by owczarek(8)iq used. The method can be summarized as follows: Using certain limiting assumptions (frictionless flui.d, irrota= tional flow, hydrostatic pressure distribution) two differential equations. Characteristics of flows around curved sections of open channels at velocities greater than the wave velocity (that is, F > 1) are discussed in this paper. In simple curves such flows produce cross-wave disturbance patterns which also persist for long distances in the downstream tangent. These disturbance patterns indicate nonequilibrium conditions whose basic cause (when F > 1) is that. This technical note studies the supercritical junction flow occurring at the right-angled confluence of four equal-width channels in which two upstream channels carry flow towards the junction. The note seeks to investigate, firstly, the pertinence of a 2D shallow water equation model to reproduce the typical flow structures at the junction.

In this study, the upstream flow depth at transitional junction flow is predicted. Detailed model observations have been executed to check various assumptions governing the one-dimensional approach. It was found that the flow depths in the up- and lateral branches are nearly equal. The transition from the sub- to supercritical flow becomes. SUPERCRITICAL FLOW AT OPEN-CHANNEL JUNCTIONS Hydraulic Model Investigation INTRODUCTION 1. One of the most important hydraulic problems in the design of flood-control channels is the analysis of the flow conditions at open-channel junctions. Relatively little discussion on method of analysis can be found in standard textbooks on hydraulics.   The transition from laminar curved channel Poiseuille flow to axisymmetric Dean vortex flow is studied using linear and weakly nonlinear analyses; these results are compared to the full simulations. Using the code, two transitions that cause the axisymmetric vortices to develop waves travelling in the streamwise direction at higher Reynolds. Transition between sub- and supercritical flows in open channel occurs at the so-called critical point, for which critical flow conditions appear. This particular flow state has been originally introduced for flows with parallel streamlines. However, as streamlines are considerably sloped and inclined in the vicinity of the critical point, these effects have to be accounted for.

Supercritical flow conditions existed for all measurements. Appendix A describes limited superelevation tests of curved channels of circular cross section. Appendix B summarizes model tests results of the trapezoidal sinuous channel of Verdugo Wash. The basic study s:'ows that the minimum length of spiral transition. Combining open channel flow in rectangular channels of equal width is considered for transitions from sub- to supercritical flow. The upstream water level is determined by a one-dimensional approach. These scenarios concerned alternative values in the hydraulic model’s geometry (length and morphology of the cut-lines), in the water’s flow conditions (subcritical, critical, and supercritical flow), in the diverted water volumes through the divider to the new riverbed (e.g., . Combining open channel flow in rectangular channels of equal width is considered for transitions from sub‐ to supercritical flow. The upstream water level is determined by a one‐dimensional approach. Using appropriate observations, the solution is checked .