1,721,016 research outputs found
Un modello discontinuous Galerkin per la simulazione del deflusso in tubi collassabili con proprietà meccaniche discontinue: applicazione allo studio dell’emodinamica
No full textIn questo lavoro viene presentato un nuovo modello numerico monodimensionale Runge-Kutta discontinuous Galerkin, accurato al terzo ordine nello spazio e nel tempo, per l’integrazione delle equazioni del moto di un fluido incomprimibile in una condotta in pressione. Il problema è reso complicato dall’ipotesi che il tubo possa essere collassabile ed abbia caratteristiche meccaniche e geometriche variabili nello spazio, anche in modo discontinuo. La naturale applicazione del modello è la simulazione del deflusso sanguigno nel sistema circolatorio, con particolare enfasi al moto del sangue nelle vene (Fung, 1997) e in vasi riparati chirurgicamente tramite l’impianto di protesi vascolari (e.g. Umscheid & Stelter, 1999)
Propagation of a Herschel-Bulkley fluid over a curved erodible bottom
No full textGeophys. Res. Abs., EGS02-A-0236
Case study: Design of flood control systems on the Vara River by numerical and physical modeling
No full textIn the present paper, we investigate the effectiveness of a flood defense project based on storage reservoirs, presently under study for the Magra River and Vara River (Italy). We have focused the analysis on two detention reservoirs and studied their response to different hydrological scenarios mostly in terms of flood mitigation efficiency, leaving aside sediment transport issues. The analysis has been carried out with the aid of a physical model and one-dimensional numerical simulations. Experimental and numerical simulations have been performed spanning a wide range of hydrological conditions. Some of
the results can be generalized for different applications where
similar flood control systems are employed
Reply to Comment by Cao and Hu on Long waves in erodible channels and morphodynamic influence
No full textAssessing impacts of dam operations: interdisciplinary approaches for sustainable regulated river management
No full textA special session of the European Geosciences Union General Assembly held in Vienna on 2–7 May 2010 was dedicated to the assessment of the impacts of hydropeaking, definition and implementation of environmental flows, implementation of experimental releases and flushing floods and proposal of mitigation measures, including dam removal and dam re-operation. This special issue contributes to the understanding of consequences of dam operations, promoting interdisciplinary works in the ecohydrology field and stimulating scientific exchange between
ecologists, hydrologists, geomorphologists, engineers and end-users to develop a unified view of the problems of flow regulation below
dams
Application of a one-dimensional mathematical model for river morphodynamics: silting in the Kugart River, Kyrgyzstan.
No full text
Climate change-induced water scarcity in the Alps and hydropower: challenges for sustainable water-use
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