Publications related to Open-channel flow

Granulation of snow: From tumbler experiments to discrete element simulations

Michael Lehning, Johan Alexandre Philippe Gaume, Betty Sovilla, Walter Steinkogler

It is well known that snow avalanches exhibit granulation phenomena, i.e., the formation of large and apparently stable snow granules during the flow. The size distribution of the granules has an influence on flow behavior which, in turn, affects runout di ...

2015

Quadrant Analysis of Shear Events in Open Channel Flows Over Mobile and Immobile Hydraulically Rough Beds

Mário Jorge Rodrigues Pereira Da Franca

Sediment overfeeding may induce important changes in the structure of the near-bed region of gravel-bed river flows, mainly in what concerns exchange of momentum and mass between the flow within the riverbed roughness elements and the flow in the upper reg ...

2014

Discussion of "Skimming, Nonaerated Flow on Stepped Spillways over Roller Compacted Concrete Dams" by Ines Meireles, Floriana Renna, Jorge Matos, and Fabian Bombardelli

Michael Pfister

The nonaerated region may occupy a large portion of the skimming flow in steep, stepped spillways, particularly for relatively high unit flow rates. In spite of the numerous contributions on the hydraulic properties at both the inception point of air entra ...

American Society of Civil Engineers2014

Stabilized reduced basis method for parametrized advection-diffusion PDEs

Gianluigi Rozza, Paolo Pacciarini

In this work, we propose viable and efficient strategies for the stabilization of the reduced basis approximation of an advection dominated problem. In particular, we investigate the combination of a classic stabilization method (SUPG) with the Offline-Onl ...

Elsevier2014

Cavitation surge modelling in Francis turbine draft tube

François Avellan, Christophe Nicolet, Sébastien Alligné

Francis turbines may experience cavitation surge phenomenon in the draft tube inducing large pressure fluctuations which can jeopardize the hydraulic system integrity. To predict this phenomenon, a one-dimensional draft tube model is derived from flow mome ...

Taylor & Francis Ltd2014

Model Order Reduction in Fluid Dynamics: Challenges and Perspectives

Alfio Quarteroni, Gianluigi Rozza, Andrea Manzoni, Toni Mikael Lassila

This chapter reviews techniques of model reduction of fluid dynamics systems. Fluid systems are known to be difficult to reduce efficiently due to several reasons. First of all, they exhibit strong nonlinearities - which are mainly related either to nonlin ...

Springer International Publishing2014

Unsteady Aerodynamics of Low-Pressure Steam Turbines Operating Under Low Volume Flow

Peter Ott, Benjamin Megerle, Ivan William McBean

Nonsynchronous excitation under low volume operation is a major risk to the mechanical integrity of last stage moving blades (LSMBs) in low-pressure (LP) steam turbines. These vibrations are often induced by a rotating aerodynamic instability similar to ro ...

American Society of Mechanical Engineers2014

An Intercomparison of LES Subgrid-Scale Models for Simulations of Slope Flows

Jiannong Fang, Marc Parlange, Marco Giovanni Giometto

We propose an inter-comparison of Smagorinsky type subgrid-scale models for the simulation of high Reynolds number katabatic flows, with the purpose of testing the validity of some of the model's assumptions for the considered application. Katabatic flows ...

2014

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Open-channel flow

Turbulent Transport in Complex, Alpine Environments

Granulation of snow: From tumbler experiments to discrete element simulations

Quadrant Analysis of Shear Events in Open Channel Flows Over Mobile and Immobile Hydraulically Rough Beds

Discussion of "Skimming, Nonaerated Flow on Stepped Spillways over Roller Compacted Concrete Dams" by Ines Meireles, Floriana Renna, Jorge Matos, and Fabian Bombardelli

Stabilized reduced basis method for parametrized advection-diffusion PDEs

Cavitation surge modelling in Francis turbine draft tube

Model Order Reduction in Fluid Dynamics: Challenges and Perspectives

Unsteady Aerodynamics of Low-Pressure Steam Turbines Operating Under Low Volume Flow

An adjoint-based approach to the optimal control of separated flows

An Intercomparison of LES Subgrid-Scale Models for Simulations of Slope Flows

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An adjoint-based approach to the optimal control of separated flows

Model Order Reduction in Fluid Dynamics: Challenges and Perspectives

Cavitation surge modelling in Francis turbine draft tube

Stabilized reduced basis method for parametrized advection-diffusion PDEs

Discussion of "Skimming, Nonaerated Flow on Stepped Spillways over Roller Compacted Concrete Dams" by Ines Meireles, Floriana Renna, Jorge Matos, and Fabian Bombardelli

Quadrant Analysis of Shear Events in Open Channel Flows Over Mobile and Immobile Hydraulically Rough Beds

Granulation of snow: From tumbler experiments to discrete element simulations

Turbulent Transport in Complex, Alpine Environments

Unsteady Aerodynamics of Low-Pressure Steam Turbines Operating Under Low Volume Flow

An Intercomparison of LES Subgrid-Scale Models for Simulations of Slope Flows