Dynamic equations for steady spatially varied open channel flow: a critical review |
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| Authors: | P Venkataraman MS Nasser AS Ramamurthy |
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| Institution: | Department of Civil Engineering, Sri Venkateswara University college of Engineering, Tirupati, Andhra Pradesh, 517502, India;Department of Civil Engineering, Concordia University, Montreal, Quebec, H3G 1M8, Canada |
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| Abstract: | A review of the dynamic equations governing steady spatially varied flow in open channels is presented. These equations are derived by employing either the momentum or the energy principle: the choice of the method employed is based on convenience. Nevertheless, the two approaches yield different results when applied to a particular flow situation. Recent researches have established that this anamoly is due to the omission of the influence of the lateral flow. The inconsistencies existing among the different forms of these equations and the rather incomplete nature of their derivation are discussed. It is believed that with the present state of knowledge, it is possible to obtain identical spatially varied flow profiles when the influencing parameters are properly evaluated whether one uses the momentum or the energy approach. The need for further study to provide a better understanding of this practically important phenomenen is established and potential research directions are defined. Recent contributions to the analysis of the hydraulic characteristics of the spatially varied flow phenomenon and the delineation of the spatially varied flow profiles into eight possible patterns are also presented. |
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