A mathematical approach to submerged horizontal buoyant jet trajectory and a criterion for jet flow patterns

Ma, Ji; Song, Yanpo; Zhou, Ping; Cheng, Wei; Chu, Shigan

doi:10.1016/j.expthermflusci.2017.11.011

Cited by 25 publications

(4 citation statements)

References 30 publications

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“…It was found that in the initial period, the interface of gaseous jets comprised wave-like structures, showing obvious expansion-necking structures, as shown in Figure 4. This morphological feature can be found in flow structures at all different water depths, and similar structures are also seen elsewhere in low speed jets in reference [3,27]. In the initial period of injecting of underwater supersonic gaseous jets, the gas flow is established with the blocking effect of water.…”

Section: Revolution Of Gas-water Interface In Underwater Jetssupporting

confidence: 76%

The Evolution of Interfaces for Underwater Supersonic Gas Jets

Zhang

et al. 2020

Water

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The evolution of interfaces for underwater gas jets is the main morphological manifestation of two-phase unstable interaction. The high-speed transient photographic recording and image post-processing methods are used to obtain the interfacial change in a submerged gaseous jet at different stages after its ejection from the Laval nozzle exit. The relationship between the pressure pulsation in the wake flow field and the interfacial change is further analyzed by combining the experimental results with computational results. A theoretical model is employed to address the competition dominant mechanism of interface instability. The results show that the jet interface of a supersonic gas jet gradually changes from one containing wave structures to a transition structure, and finally forms a steady-state conical jet. The fluctuation of the jet interface results in the pulsation of the back-pressure. The dominant mechanism of the interface changes with the development and distribution of the jet, from Kelvin-Helmholtz (K-H) instability beyond the nozzle exit changing to Rayleigh-Taylor (R-T) instability in the downstream.

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Section: Revolution Of Gas-water Interface In Underwater Jetssupporting

confidence: 76%

The Evolution of Interfaces for Underwater Supersonic Gas Jets

Zhang

et al. 2020

Water

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“…As a consequence of the bubble formation, they are less accessible for quantitative methods like PIV or LDA. Hence, they are mainly tackled by image processing to obtain at least global features of the flow (Weiland and Vlachos, 2013;Harby et al, 2014;Berna et al, 2017;Ma et al, 2018;Dong et al, 2020). Likewise, it is not possible to measure jet velocities in highly laden particle jets commonly used for the burning of solid fuels (Birzer et al, 2009(Birzer et al, , 2011(Birzer et al, , 2012Puttinger et al, 2013).…”

Section: Problem Definitionmentioning

confidence: 99%

Time-resolved PIV measurements of a deflected submerged jet interacting with liquid-gas and liquid-liquid interfaces

Puttinger

Saeedipour

2021

Exp. Comput. Multiph. Flow

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This paper presents an experimental investigation on the interactions of a deflected submerged jet into a liquid pool with its above interface in the absence and presence of an additional lighter liquid. Whereas the former is a free surface flow, the latter mimics a situation of two stratified liquids where the liquid-liquid interface is disturbed by large-scale motions in the liquid pool. Such configurations are encountered in various industrial applications and, in most cases, it is of major interest to avoid the entrainment of droplets from the lighter liquid into the main flow. Therefore, it is important to understand the fluid dynamics in such configurations and to analyze the differences between the cases with and without the additional liquid layer. To study this problem, we applied time-resolved particle image velocimetry experiments with high spatial resolution. A detailed data analysis of a small layer beneath the interface shows that although the presence of an additional liquid layer stabilizes the oscillations of the submerged jet significantly, the amount of kinetic energy, enstrophy, and velocity fluctuations concentrated in the proximity of the interface is higher when the oil layer is present. In addition, we analyze the energy distribution across the eigenmodes of a proper orthogonal distribution and the distribution of strain and vortex dominated regions. As the main objective of this study, these high-resolution time-resolved experimental data provide a validation platform for the development of new models in the context of the volume of fluid-based large eddy simulation of turbulent two-phase flows.

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“…Numerous studies have examined various types of horizontal, angled, buoyant, and non-buoyant jets, in relation to the wide range of applications, including gaseous jets used in aeration processes [17], solid rocket motors operating underwater [18], hydrogen safety [19], industrial smelting processes [20], coastal sewage disposal projects [21], and others. Arakeri et al [22] tested a horizontally discharged laminar buoyant jet to investigate bifurcations.…”

Section: Introductionmentioning

confidence: 99%

An experimental study of buoyant jets : effects of viscoplasticity

Moosavi,

Hassanzadeh,

Akbari

et al. 2023

Progress in Canadian Mechanical Engineering. Volume 6

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In this paper, we experimentally investigated the injection of a Newtonian jet into Newtonian/viscoplastic ambient fluids. Although this study has applications in environmental flows, mixing processes, and so on, the main application of our interest is the plug and abandonment of oil and gas wells. Hence, we analyzed the impingement time of the jet in addition to other jet characteristics, namely, the laminar length and the deviation length. Furthermore, we observed two regimes for different ambient fluids, i.e. the mixing regime for a Newtonian ambient fluid and the trapped regime for a viscoplastic ambient fluid. Moreover, we examined the impact of the Reynolds number (Re) and the Bingham number (BN), on the jet characteristics. Re and BN have opposite effects on the impingement time, causing a decrease and growth, respectively. We also observed the existence of a laminar length at higher Re in the trapped regime, compared to the mixing regime. An increase in Re results in a growth in the deviation length for both regimes, and this growing trend is more drastic for the mixing regime.

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A mathematical approach to submerged horizontal buoyant jet trajectory and a criterion for jet flow patterns

Cited by 25 publications

References 30 publications

The Evolution of Interfaces for Underwater Supersonic Gas Jets

The Evolution of Interfaces for Underwater Supersonic Gas Jets

Time-resolved PIV measurements of a deflected submerged jet interacting with liquid-gas and liquid-liquid interfaces

An experimental study of buoyant jets : effects of viscoplasticity

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