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Nappe flow over horizontal stepped chutes

Journal of Hydraulic Research/De Recherches Hydrauliques, 2010
BY FLORIANA MARIA RENNA and UMBERTO FRANTINO, Journal of Hydraulic Research Vol. 48, No. 5 (2010), pp.
Umberto Fratino
exaly   +3 more sources

Aeration efficiency with nappe flow over stepped cascades

Proceedings of the Institution of Civil Engineers - Water Management, 2007
Hydraulic structures can increase dissolved oxygen levels by creating turbulent conditions where small air bubbles are carried into the bulk of the flow. Chute aeration is a particular instance of this. A chute is characterised by a steep bed slope associated with torrential flow. This chute flow may be either smooth or stepped.
Baylar, A., Bagatur, T., Emiroglu, M. E.
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3-D numerical models of viscous flow applied to fold nappes and the Rawil depression in the Helvetic nappe system (western Switzerland)

Journal of Structural Geology, 2016
Abstract The Helvetic nappe system exhibits three-dimensional (3-D) features such as the lateral variation in geometry between the Morcles and Doldenhorn fold nappes or the Rawil depression. We perform 3-D finite element simulations of linear and power-law viscous flow to investigate fold nappe formation during shortening of a half graben with ...
Stefan M Schmalholz, Jean-Luc Epard
exaly   +2 more sources

Hydraulics of Nappe Flow Regime above Stepped Chutes and Spillways [PDF]

, 1994
Stepped chutes have become a popular method for discharging flood waters. The steps increase significantly the rate of energy dissipation taking place on the spillway face and reduce the size of the required downstream dissipation basin. In this paper, the author reviews the characteristics of nappe flows on stepped chutes.
Chanson, Hubert
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Numerical simulation of flow over a coastal embankment and validation of the nappe flow impinging jet

Modeling Earth Systems and Environment, 2023
Norio Tanaka, Tanaka Norio
exaly   +2 more sources

Nappe Oscillations on Free-Overfall Structures: Experimental Analysis [PDF]

Journal of Hydraulic Engineering, 2018
peer reviewedUnder 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 fountains.
Michel Pirotton, Benjamin Dewals, Pierre Archambeau   +2 more
exaly   +2 more sources

Energy dissipation of nappe flow over stepped spillways

ISH Journal of Hydraulic Engineering
Farzin Salmasi, John Abraham
exaly   +2 more sources

Nappe flow in stepped channels – Occurrence and energy dissipation

2020
The use of stepped spillways with nappe flow has been more closely related to the use of gabion spillways, where maximum flow velocities must be respected in order to guarantee the integrity of gabions. The increasing interest in stepped spillways built with different construction materials, either founded on the downstream slope of embankment dams ...
António N. Pinheiro, Cristina S. Fael
openaire   +1 more source

Flow patterns in nappe flow regime down low-gradient stepped chutes

Journal of Hydraulic Research, 2009
Although modern gravity dam spillways include often steep chutes operating in skimming flow regime, succession of free-falling nappes (i.e. nappe flow regime) are more common on low gradient chutes and cascades, and this flow situation received little attention to date.
Thorwarth, J., Schleiss, A., Koengeter, J., Schuettrumpf, H.   +3 more
openaire   +3 more sources

Fluid flow, alteration and mineralisation associated with theemplacement of the Lycian nappes (SW Turkey)

Journal of Geochemical Exploration, 2003
Abstract Associated with the emplacement of the Lycian nappes, SW Turkey, Cretaceous limestones were thrusted over an ophiolitic melange in their front zone. Miocene flysch formed immediately in front of these nappes and were overthrusted by the Lycian nappes.
Philippe Muchez, Sofie Nollet, Manuel Sintubin, Suzy Len, Michael Joachimski   +4 more
openaire   +1 more source