Encontrados 5 documentos, a visualizar página 1 de 1
Ultrasound velocity profile (UVP) measurements in shallow open-channel flows
Leal, J. B.; Fernandes, João N.; Cardoso, António H.1st European IAHR Congress, 6-4 May, Edinburgh, Scotland ; This paper is concerned with velocity measurements in shallow water flows by using Ultrasonic Velocity Profile (UVP)probes. The measurements were made in a 10 m long, 0.4 m wide flume whose slope is 0.00117. Diagonal and horizontal positioning of a single probe and the combination of two probes were tested as configurations of the UVP probes. Streamwis...
The thickness of the transport layer in stratified geomorphic flows
Leal, J. B.; Ferreira, Rui M. L.; Cardoso, António H.River Flow 2010 ; This paper is aimed at the development of a model for the thickness of the transport layer in stratified geomorphic flows such as sheet-flows or immature debris flows occurring, for instance, as a consequence of dam failure. These are flows with high geomorphic potential, occurring at or generating high shear stresses, whose ultimate driving mechanism is gravity. The micromechanical character...
Geomorphic dam-break flows. Part II: numerical simulation
Leal, J. G. A. B.; Ferreira, Rui M. L.; Cardoso, António H.Proceedings of the Institution of Civil Engineers - Water Management 163 Issue WM6
Organised turbulence over mobile and immobile hydraulically rough boundaries
Leal, J. B.; Ferreira, Rui M. L.; Franca, Mário J.; Cardoso, António H.33rd IAHR Congress: Water Engineering for a Sustainable Environment ; The present work is aimed at the study of near-bed organised turbulence over mobile and immobile, porous, hydraulically rough boundaries. The bed was permeable and composed of non-cohesive sediments. Two data sets were analysed, characterised by the same u*. The mobile bed data featured generalised sediment transport for all size fractions s...
Maximum level and time to peak of dam-break waves on mobile horizontal bed
Leal, J. B.; Ferreira, Rui M. L.; Cardoso, António H.Journal of Hydraulic Engineering, Vol. 135, No. 11, November 1, 2009 ; This experimental study focuses the influence of bed material mobility and initial downstream water level on maximum water level and time to peak of dam-break waves. It covers horizontal bed conditions on fixed bed, sand bed, and pumice bed. Results include water surface level time evolution, maxima wave levels and time to peak. The influen...
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