... ABSTRACT This paper presents a method to obtain the constitutive properties of sand and clay from the pressure-expansion curves of spherical cavities. The theory applies to the interpretation of static cone penetration tests, which are often modelled as spherical expansion processes. For sand...

... ABSTRACT Super cavitating propellers design takes advantage of the formation of large cavities to increase flow velocity by reducing drag. Inter-blade flow of such a propeller is investigated experimentally via Laser Doppler Velocimetry and high-speed visualizations. Mean flow and fluctuations...

... ABSTRACT The technology of air cavity drag reduction on the bottom of ship has good drag reduction ceiling and energy saving potential. In this paper, VLCC is transformed and a three-dimensional numerical scale model is established, and the VOF two-phase flow model and the k-ω turbulence model...

... ABSTRACT In this study, we clarify and investigate the air cavity phenomena in the seaplane float with step component during hydroplaning phase in pitch angle condition. The air cavity around the seaplane float model was well-captured in 3D condition which is very important finding...

... indicators are compared with the results from the paint test. The erosive indicators built by the material derivative of the potential energy contained in the macro cavity has higher amplitude of erosive power than those ignored the advection terms. The erosive indicators using the time-averaged pressure...

... component experiment solitary wave water surface amplitude correlation coefficient investigation particle image velocimetry cavity artificial intelligence flow field information secondary jet piv method velocity field Proceedings of the Thirty-third (2023) International Ocean and Polar...

... fluid dynamics vehicle collapse load multiphase flow cavity collapse upstream oil & gas initial internal pressure equation axisymmetric vehicle international ocean galerkin method water exit process discretization cavity interface node university boundary node simulation...

... on cavity positions, a hole is drilled at the cavity area to improve the local pressure distribution and cavitating behaviour. The hole influences the hydrodynamic performance slightly. The holes with specific size and position near the leading edge alters the position and pattern of the sheet cavity...

... that the influence of two-phase flow is greater near the closure area of the cavity, which needs to be considered separately. The closer to the cavity closure zone, the greater the nonlinear effect. INTRODUCTION The underwater noise not only causes harm to marine life, but also affects the stealth of military...

..., including hemispherical head and cone-shaped head (90°~150°). During the water entry of these free-falling projectiles, splashing water, the deformed free surface and the cavity evolution behind the cylinder are presented, which show agreement with experimental data. Vertical velocities and forces obtained...

... on the evolution of free surface, the formation and propagation of tsunami. The results are compared with the work of Gisler (Gisler, et al., 2004). Though the cavity diameter, height of jet and initial height of tsunami agree well with that of Gisler’ work, the shape of cavity is quite different. This indicates...

... Abstract An experimental study of the cavity evolution during the oblique water entry of a slender axisymmetric body in progressive waves is presented. The projectile, with a flat headform, is driven by a computer-controlled linear motor to ensure a constant impact velocity during the oblique...

... model turbulence model naca0015 hydrofoil passenger transportation cavitation phenomenon flow field grid file cloud cavitation equation cavity le method Proceedings of the Thirty-first (2021) International Ocean and Polar Engineering Conference www.isope.org Rhodes, Greece, June 20 25...

... cavitation and the sheet cavity are the focus of propeller cavitation study. (Oprea and Bulten, 2009; Bensow and Bark, 2010). When the ship hull is also concerned, the impacts of the irregular wake behind the ship to the propeller cavitation is a research emphasis with experimental and numerical methods...

... ABSTRACT Wall-Modeled Large Eddy Simulation (WMLES) was performed to investigate the mechanism of the stability of waterjet injected into a surrounding coaxial swirling gas flow. The study takes into consideration the distribution of pressure and velocity in the cavity on the influence...

... ABSTRACT In this paper, we describe longitudinal stability of a supercavitating underwater vehicle with planing. First, cavity dynamics were modeled to obtain the cavity profile for calculating the wetted area. Subsequently, the forces and moments acting on each wetted part of the vehicle...

... is used to calculate the unsteady natural and ventilated cavitating flow and the accuracy of the numerical simulation method is validated by comparison with the experimental results. The evolution characteristics of the pressure fluctuations and the cavity shedding are analyzed. The evolution mechanism...

... ABSTRACT Hovercraft has a certain degree of ability breaking the ice during marine transportation. The air cavity under the ice sheet by air cushion has a great influence on the progress of breaking the ice. Therefore, based on CFD (Computational Fluid Dynamics) method, the air cavity...

... turbulence model and the Schnerr-Sauer cavitation model have been implemented to analyze the hydrodynamic performance of the cavity flows. Research suggests that the placement of a small obstacle can inhibit the region of cavitation and restrain the shedding of sheet cavitation. Moreover, the existence...

... ABSTRACT The present work focuses on the comparison of the numerical simulation of sheet/cloud cavitation with RANS and LES method around NACA0012 hydrofoil. Three kinds of turbulence models -- SST k-ω, modified SST k-ω and Smagorinsky model are used in this paper. The unstable sheet cavity...