Results 11 to 20 of about 296 (136)
Characteristics of flow over the free overfall of triangular channel
MATEC Web of Conferences, 2018 In the present paper, the effects of side slopes, bed slopes and bed roughness on the flow over free overfalls in triangular channels have been studied experimentally.
Irzooki Raad, Hasan Safa
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Experimental Study on a Plane Free Overfall
World Environmental and Water Resources Congress 2008, 2008 This paper deals with the analysis of collected experimental data on free overfall in sub-critical and super-critical flow conditions, using the analytical and empirical approaches available by the technical literature. The aim is to provide new informations and tools useful to design correctly a single drop hydraulic structure.
RENNA F. M +3 more
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مجله آب و خاک, 2017 Introduction: A free overfall offers a simple device for flow discharge measuring by a single measurement of depth at the end of the channel yb which is known as the end depth or brink depth.
A.R. Vatankhah, S. Kiani, S. Riahi
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Inviscid Solution for the Problem of Free Overfall
Journal of Applied Mechanics, 1979 The flow problem of free overfall has been examined through hodograph transformations. It has been found that even with strong influence of the gravitational field, the stream function can be solved in the hodograph plane through numerical calculations.
Chow, W. L., Han, T.
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Nappe Oscillations on Free-Overfall Structures: Experimental Analysis [PDF]
Journal of Hydraulic Engineering, 2018 AbstractUnder relatively low heads, the occurrence of nappe oscillation, also known as nappe vibration, may be observed on hydraulic structures with a free overfall, such as weirs, crest gates, and...
Lodomez, Maurine +4 more
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Free Overfall in Inverted Semicircular Channels
Journal of Hydraulic Engineering, 2003 This paper presents a theoretical and experimental study on free overfall in a smooth inverted semicircular channel. Applying the momentum equation based on the Boussinesq approximation, the flow upstream of a free overfall is theoretically analyzed to calculate the end-depth-ratio (EDR).
FERRO, Vito
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Discussion of "Characteristics of free overfall for supercritical flows" [PDF]
Canadian Journal of Civil Engineering, 2007 It was claimed that the characteristics of free overfall with supercritical inflow conditions were not studied to date. That is incorrect and the Canadian Journal of Civil Engineering published a pertinent study about 10 years ago (Chanson and Toombes 1998).
Chanson, Hubert, Toombes, Luke
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Nappe oscillations on free-overfall structures, data from laboratory experiments. [PDF]
Sci Data, 2020 peer reviewedThis paper presents a dataset obtained from fifty-two laboratory experiments of nappe oscillations on free overfall structures. Data were collected on two complementary experimental setups, each consisting of a linear weir model. The dataset
Lodomez M +6 more
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Nappe Vibration Mitigation Techniques for Free-overfall Structures
, 2015 Nappe vibration is a phenomenon that has been witnessed in the field for a variety of different free overflow hydraulic structures operating at low heads, such as fountains, crest gates, and weirs. This phenomenon is visually characterized by oscillations in the thin nappe cascading downstream of the control structure.
Erpicum, Sébastien +4 more
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Frequencies of Nappe Vibration for Free-overfall Structures
, 2016 Under relatively low-head discharges, the occurrence of nappe oscillation, otherwise known as nappe vibration, may be observed on hydraulic structures with a free overfall, such as weirs, crest gates and fountains. This phenomenon, which has been early identified as undesirable and potentially dangerous on gates, is characterized by oscillations in the
Lodomez, Maurine +4 more
openaire +5 more sources