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Title: Some problems in open channel hydraulics : an investigation with the aid of laboratory experiments
Author: Chee, Sek Por
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 1961
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Part I deals with the investigation of the Black Esk River water supply scheme using a 1/30 scale model. In the design of hydraulic schemes of this nature, certain aspects of the problem are often not amenable to mathematical analysis and model testing is commonly resorted to. The Black Esk investigation was undertaken to prove the design generally and to provide answers to specific problems. A study of scale effect on bellmouth discharge using the method of dimensional analysis has also been included. PART II describes the experiments on the resistance to flow in open channel bends. These experiments were made to determine the important parameters involved in estimating the energy loss in semicircular bends. It also attempts to find simple equations for computing flow in open channels of non-linear alignment based on certain well established laws. In the laboratory testing of river models, vertical scale and bed slope exaggeration have often been found necessary to offset scale effects. Observations were made on bends, built to different scales, to examine the question of vertical scale and bed slope exaggeration. A dimensional analysis of the problem has made possible a clearer understanding of the experimental findings. Part III concerns the experiments on the action of progressive waves on a bed of sand. It has often been thought that the currents associated with progressive waves, as distinct from tidal currents, may be the cause of large movements of sand. These observations confirm that sand transportation in the direction of wave propagation can occur in considerable amounts. It also revealed that under certain conditions a large inversion of solid discharge in the opposite direction to wave propagation may also be possible.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available