Empirical Modeling of Oxygen Uptake of Flow Over Stepped Chutes
نویسندگان
چکیده
منابع مشابه
Hydraulics of stepped chutes: The transition flow L’hydraulique des chutes en marches d’escalier: L’écoulement de transition
Stepped spillway flows may behave as a succession of free-falling nappes at low flows and as a skimming flow at large discharges. However there is a range of intermediate flow rates characterised by a chaotic flow motion associated with intense splashing: i.e. the transition flow regime. Detailed air–water flow properties in transition flows were measured in two large experimental facilities. T...
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Recently the design flows of many dams have been re-evaluated, resulting in spills often larger than the original ones. In many cases, occurrence of revised flows would result in dam overtopping because of insufficient storage and spillway capacity of reservoirs. Embankment dams whilst common are more likely to fail than other dam types when overtopped in an uncontrolled manner because of breac...
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Recently, particular attention has been paid to the stepped spillways due to the increasing effect of energy dissipation and the reduction of cavitations risks with the development of Roller Compacted Concrete (RCC) technique. Flow regimes on the spillways divide into three groups, namely skimming, jet and transition flow. Compared to the numerical methods, the majority of performed studies in ...
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Stepped spillwayflows are characterised by significant free-surface aeration downstream of the inception point of air entrainment. The stepped design is advantageous for applications which require large energy dissipation and strong flow aeration. While the energy dissipation rate for embankment stepped spillways was studied previously, the optimum design for aeration and air–water mass transfe...
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ژورنال
عنوان ژورنال: Nigerian Journal of Technology
سال: 2014
ISSN: 2467-8821,0331-8443
DOI: 10.4314/njt.v34i1.6