Results 21 to 30 of about 2,953 (220)
Eulerian–Lagrangian method for simulation of cloud cavitation [PDF]
Journal of Computational Physics, 2018 We present a coupled Eulerian-Lagrangian method to simulate cloud cavitation in a compressible liquid. The method is designed to capture the strong, volumetric oscillations of each bubble and the bubble-scattered acoustics. The dynamics of the bubbly mixture is formulated using volume-averaged equations of motion. The continuous phase is discretized on
Kazuki Maeda, Tim Colonius
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Analysis of the cavitation instabilities with time-resolved stereo and multiplane Particle Image Velocimetry [PDF]
, 2022 The present paper is devoted to the analysis of the various instabilities of cavitation attached to a two-dimensional (2D) profile. Time resolved stereo Particle Image Velocimetry (PIV) was conducted in a small-scale 2D venturi type section, in different
Olivier Coutier-Delgosha +7 more
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Cavitation regime detection through Proper Orthogonal Decomposition: dynamics analysis of the sheet cavity on a grooved convergent-divergent nozzle [PDF]
, 2014 The unsteady character of the sheet cavity dynamics on the suction side of hydrofoils, on convergent–divergent nozzles or on blades in turbines and propellers is responsible for many issues like erosion, noise and vibrations. This two-phase flow dynamics
DANLOS, Amélie +7 more
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Study of the cavitating instability on a grooved Venturi profile [PDF]
, 2014 Instabilities of a partial cavity developed on a hydrofoil, a converging-diverging step, or in an interblade channel have already been investigated in many previous works. The aim of this study is to evaluate a passive control method of the sheet cavity.
DANLOS, Amélie +4 more
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Cavity induced vibration of flexible hydrofoils [PDF]
, 2014 The objective of this work is to investigate the influence of cavity-induced vibrations on the dynamic response and stability of a NACA66 hydrofoil at 8° angle of attack at Re=750 000 via combined experimental measurements and numerical simulations.
CHAE, Eun Jung +4 more
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Dynamics of the Cloud Cavitation and Cavitation Erosion.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1999 It is well known that a cloud cavitation is one of the most destructive forms of cavitation. The set of equations for the motion of a spherical bubble cloud is formulated. Behavior of bubble clouds are simulated numerically when the surrounding pressure is decreased from 50 kPa to a 10 kPa and then increased to 50 kPa.
SHIMADA, Masahito +2 more
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Cavitation Bubble Cloud Break-Off Mechanisms at Micro-Channels
Fluids, 2021 This paper provides new physical insight into the coupling between flow dynamics and cavitation bubble cloud behaviour at conditions relevant to both cavitation inception and the more complex phenomenon of flow “choking” using a multiphase compressible ...
Paul McGinn +4 more
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High speed visualizations of the cavitating vortices of 2D mixing layer [PDF]
, 2012 The present study investigates experimentally vortex dynamics of a cavitating two-dimensional mixing layer at a high Reynolds number in order to determine the effect of growth and collapse of cavitation.
Aeschlimann, Vincent +7 more
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Spectral content of cloud cavitation about a sphere [PDF]
Journal of Fluid Mechanics, 2016 The physics and spectral content of cloud cavitation about a sphere are investigated in a variable-pressure water tunnel using dynamic surface pressure measurement and high-speed imaging. Experiments are conducted using a polyvinyl chloride sphere at a Reynolds number of $1.5\times 10^{6}$ with cavitation numbers, $\unicode[STIX]{x1D70E}$, ranging from
K. L. de Graaf +2 more
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Effects of Polydispersity in Bubbly Flows [PDF]
, 2010 This thesis concerns the dynamics of bubbly flows with a distribution of equilibrium bubble sizes. The main goal is to formulate the physical and numerical models of continuum bubbly flows that enable us to efficiently compute the average mixture ...
Ando, Keita
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