Bass Strait is an area of shallow continental shelf located between Victoria and Tasmania connecting the south-east Indian Ocean with the Tasman Sea (Figure 1). The region supports a diverse marine ecosystem with a wide range of habitats. The submerged temperate rocky reefs and canyons contain high species biodiversity with a large proportion being endemic to the area [3]. Marine activities of ...

Conventional wisdom among cave divers is that submerged caves in aquifers, such as in Florida or the Yucatan, are unstable due to their ever-growing size from limestone dissolution in water. Cave divers occasionally noted partial cave collapses occurring while they were in the cave, attributing this to their unintentional (and frowned upon) physical contact with the cave walls or the aforementi...

In this work, fluid dynamics of a turbulent round impinging jet has been studied using Computational Fluid Dynamics (CFD) and the results have been compared with experimental data from the literature. The fluid was water with density of 1000 kg/m 3 and the average velocity of the submerged jet was kept constant at 10.7 m/s while the liquid viscosity varied from 1 cP to 100 cP. Different turbule...

This paper describes a quasi-3D Bayesian inversion of oceanographic tracer data from the South Atlantic Ocean. Initially, one active neutral-density layer is considered with an upper and lower boundary. The available hydrographic data are linked to model parameters (water velocities, diffusion coefficients) via a 3D advection–diffusion equation. A robust solution to the inverse problem can be o...

Abstract Underwater rocket propulsion is increasingly used in advanced marine vehicles that may be subject to supersonic gaseous jets while submerged. This work investigates the influence of nozzle divergence on multi-flow field evolution process and thrust oscillation characteristics by multiple numerical simulations using a VOF multiphase flow model. Four half angles are taken into considerat...

During the month of June, 2003, the Naval Research Laboratory conducted a series of coherence experiments in shallow water (approximately 9 meters) off Panama City Beach, Florida. Examined here are preliminary mid frequency (1 10 kHz) results of analyzed temporal coherence data. For this experiment, a G34 omnidirectional source, mounted approximately 2.7 meters from the bottom, ensonified a ver...

To study the influence of impinging height H/D on flow field characteristics oblique submerged jets, numerical calculation an jet was carried out based Wray–Agarwal (W–A) turbulence model. The structure and pressure distribution under various heights (1 ≤ 8) when angle θ = 45° were analyzed. results show that with increase in height, diffusion degree gradually increased velocity decreased reach...

A mathematical modeling and numerical solution of the motion droplets chemical reagents outflowing from pneumatic sprayer are developed in article. new efficient two-fluid turbulence model is used to simulate turbulent flow. The mass fraction liquid gas stream considered small. Therefore, effect phase on dynamics air ignored. "parabolize" system hydrodynamic equations solved for For this, a mar...

The flow structure of the submerged gas jet in liquid currents is important to engineering applications. In present study, development a subjected current experimentally investigated evaluate effects on underwater evolution. A full-scale experimental setup designed for release and dispersion with different velocities. structures are captured by shadow photography combined high speed video camer...