... height on the free surface as the hydrofoil approaches. The study indicates two gas entrainment mechanisms when the wave breaks. A quasi-steady state is observed for both the total entrained volume and quantity of entrained bubbles. The vortical wake of the hydrofoil leads to the rapid disappearance...

...-velocity module chen-shan kung vortice ya-cing entrainment diagram pipe cavitation pei-yu lee percentage Proceedings of the Thirty-fourth (2024) International Ocean and Polar Engineering Conference Rhodes, Greece, June 16 21, 2024 Copyright © 2024 by the International Society of Offshore...

... method using the Zwart et al cavitation model. propeller azimuth propulsor vortex cavitation cavitation duct propeller mathematics of computing propulsor duct azimuth propulsor phv cavitation thrust strut coefficient vortice reservoir simulation numerical simulation cavity...

..., this study provides new insights and research methods for revealing the mechanism of fish movement. neural network swimming particle artificial intelligence fish swimming data reconstruction image segmentation contour deep learning information experiment threshold vortice zebrafish...

... production logging production control equation reservoir simulation production monitoring two-dimensional cylinder engineering journal coefficient reservoir surveillance reservoir characterization vortice gradient cylinder ocean engineering frequency seawater stratification...

... resonance vortex intensity engineering magnitude subsea system applied ocean research ocean engineering liquified natural gas (lng) vortice instantaneous vortex intensity threshold journal proceedings faltinsen flume floating production systems dissipation entrance experiment...

... the Magnus effect is. INTRODUCTION When a fluid flows past a bluff body, vortices are shed from the bluff body alternately and cause fluctuant forces on it, generating vortex-induced vibrations (VIVs). The VIVs of a single cylinder have been extensively studied. The key effects of reduced velocity U r...

... angle willlead resistance boundary cfd method yangying accuracy vortice Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference Ottawa, Canada, June 19-23, 2023 Copyright © 2023 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1...

... ABSTRACT The present paper analyses the vortical structures in the wake of a naval propeller operating underneath a free surface using detached-eddy simulation. We investigate the flow topology for several loading conditions and compare it with analogous observations behind a propeller...

... (Pitcher, 1982) and (Weihs, 1983), saving energy consumption, (Mark, 1987) and (Zhu, 2009). It is found that fish will detect and use the vortices around them to greatly improve their swimming efficiency. Therefore, the interaction between the flexible filaments and surrounding water is an important...

... passenger transportation cavitation inception number cavitation number marine transportation drag coefficient hydrofoil tip vortex cavitation clearance cavitation inception hydrofoil cavitation inception experimental study vortice cavitation vortex cavitation tip clearance...

..., if rubbish is sucked, the resistance performance is just worse, which is a major disadvantage of the ducted propeller. propeller instability characteristic vortex structure efficiency ducted propeller vortex wake instability mechanism thrust coefficient vortice tip vortex engineering...

... hull pressure distribution sqcm vortex lateral force vortice coefficient uniform flow longitudinal plane free vortice basic coordinate system equation Proceedings of the Thirty-first (2021) International Ocean and Polar Engineering Conference www.isope.org Rhodes, Greece, June 20 25...

... Abstract The cavitation induced by tip vortices affects the hydrodynamic performance of a propeller and causes vibration and noise radiation. Thus, it is desirable to understand and predict its behavior. In this work, we present an adaptive mesh refinement (AMR) method to control the mesh size...

.... Gu et al. (1994) found that vortex from one side of the cylinder to the other reach to a high degree of concentration of vorticity next to cylinder when the frequency ratio (ƒ–ƒ s ) increased ( ƒ is the oscillating frequency of cylinder, ƒ s is the shedding frequency for the fixed cylinder). Lu...

... (VIV) vortex shedding mode, and the number of vortices released per cycle is much greater (at most twelve). INTRODUCTION Numerous studies have been dedicated to understanding Flow–induced oscillation (FIO), as a typical problem of fluid–structure interaction (FIS), because it is crucial in a wide...

.... Forces, free-surface elevation and cylinder surface pressure are presented and analyzed. To further understanding the turbulent structures, the normalized Liutex definition is used to identify and extract the vortical structures in the wake of cylinder. INTRODUCTION Flow past vertical free surface...

... are studied to assess the influences of the stratification. Results show that internal waves are generated by the presence of the sphere in stratified fluid, which results in an increase in resistance. The vertical motions and vortices are suppressed due to the stratification in vertical direction compared...

... ABSTRACT An experimental investigation into controlling separation over a hemisphere by local wall suction has been carried out in a circulating water tunnel. The reduction in vortex shedding frequency seems to be due to weakening of the necklace vortices by local wall suction, which reduced...

.... The drag and lift characteristics, the vorticity, streamline distribution and the vortex shedding frequency are investigated. Numerical results are compared with those of the Finite Volume method (FVM) software calculations and indicate good agreements. INTRODUCTION Flow past a bluff body...