Publications related to Multiscale Computational Methodology Applied to Hydroacoustic Resonance in Cavitating Pipe Flow

A weakly nonlinear mechanism for mode selection in swirling jets

Global linear and nonlinear bifurcation analysis is used to revisit the spiral vortex breakdown of nominally axisymmetric swirling jets. For the parameters considered herein, stability analyses single out two unstable linear modes of azimuthal wavenumber m ...

Cambridge University Press2012

Investigation of the rotor blade tip vortex by PIV and CFD

Karen Ann J Mulleners

The flow field around a helicopter is dominated by strong coherent vortices originating from the blade tip as a result of the pressure difference between suction and pressure side and a high radial velocity at the tip (Leishman, 2001; Green and Acosta, 199 ...

2012

Quasi-3D modelling of bed shear stresses at high curvature

Koen Blanckaert

Single thread meandering rivers exhibit complex planformpatterns in their floodplains, resulting from a complex interaction between flow, bed and bank morphology. The flow through meander bends may be characterized by primary flow in streamwise direction a ...

Taylor & Francis Group, CRC Press2012

Hydromorphological implications of local tributary widening for river rehabilitation

Anton Schleiss, Koen Blanckaert, Marcelo Leite Ribeiro, André Roy

The hydromorphological implications of the local widening of a tributary where it enters a confluence were investigated in a laboratory setting that is representative of the 20 major confluences on the channelized Upper Rhone River. Although local tributar ...

American Geophysical Union2012

Characterisation of blade tip vortices by simultaneous time-resolved velocity and density field measurements

Karen Ann J Mulleners

The flow field around a helicopter is dominated by strong coherent vortices originating from the blade tip as a result of the pressure difference between suction and pressure side and a high radial velocity at the tip (Leishman, 2001; Green and Acosta, 199 ...

2012

Full range of blow up exponents for the quintic wave equation in three dimensions

Joachim Krieger

For the critical focusing wave equation

\square u=u^5

on

\mathbb{R}^{3+1}

in the radial case, we prove the existence of type II blow up solutions with scaling parameter

\lambda(t)=t^{-1\nu}

for all

\nu>0

. This extends the previous work by the autho ...

Elsevier2012

Forced and Self Oscillations of Hydraulic Systems Induced by Cavitation Vortex Rope of Francis Turbines

Sébastien Alligné

With economical energy market strategies based on instantaneous pricings of electricity as function of the demand or the predictions, operators harness more hydroelectric facilities to off-design operating points to cover the variations of the electricity ...

EPFL2011

Fluid Structure Interaction Simulations of Physiological Blood Flow in the Aorta

Alfio Quarteroni, Nikolaos Stergiopoulos, Simone Deparis, Philippe Reymond, Paolo Crosetto, Dimitrios Kontaxakis

The numerical tools to simulate blood flow in the cardiovascular system are constantly developing due to the great clinical interest and to scientific advances in mathematical models and computational power. The present work aims to address and validate ne ...

Elsevier2011

Cavitation influence on hydroacoustic resonance in pipe

François Avellan, Christophe Nicolet, Sébastien Alligné, Nicolas Ruchonnet

In pipe systems, pressure and flow fluctuations below cutoff frequency propagate as plane waves along pipes. Depending on the pipe length and propagation velocity, resonance leading to high amplitude pressure fluctuation may occur. At low pressure, cavitat ...

Elsevier2011

Numerical Simulation of Two-Phase Flow for Nearshore Hydrodynamics under Wave-Current Interactions

David Andrew Barry, Roham Bakhtyar, Amir Mehdi Razmi

Surf and swash zone hydrodynamics are complex, being composed of a highly energetic water-air mixture under periodically unsteady motion. Wave-current interactions have a major effect on the results of hydrodynamic simulations, and consequently on predicti ...

Coastal Education and Research Foundation2011

Multiscale Computational Methodology Applied to Hydroacoustic Resonance in Cavitating Pipe Flow

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A weakly nonlinear mechanism for mode selection in swirling jets

Investigation of the rotor blade tip vortex by PIV and CFD

Quasi-3D modelling of bed shear stresses at high curvature

Hydromorphological implications of local tributary widening for river rehabilitation

Characterisation of blade tip vortices by simultaneous time-resolved velocity and density field measurements

Full range of blow up exponents for the quintic wave equation in three dimensions

Forced and Self Oscillations of Hydraulic Systems Induced by Cavitation Vortex Rope of Francis Turbines

Fluid Structure Interaction Simulations of Physiological Blood Flow in the Aorta

Cavitation influence on hydroacoustic resonance in pipe

Numerical Simulation of Two-Phase Flow for Nearshore Hydrodynamics under Wave-Current Interactions

Forced and Self Oscillations of Hydraulic Systems Induced by Cavitation Vortex Rope of Francis Turbines

Numerical Simulation of Two-Phase Flow for Nearshore Hydrodynamics under Wave-Current Interactions

Investigation of the rotor blade tip vortex by PIV and CFD

A weakly nonlinear mechanism for mode selection in swirling jets

Characterisation of blade tip vortices by simultaneous time-resolved velocity and density field measurements

Fluid Structure Interaction Simulations of Physiological Blood Flow in the Aorta

Quasi-3D modelling of bed shear stresses at high curvature

Full range of blow up exponents for the quintic wave equation in three dimensions

Hydromorphological implications of local tributary widening for river rehabilitation

Cavitation influence on hydroacoustic resonance in pipe