High Fidelity Simulations of Primary Breakup and Vaporization of Liquid Jet in Cross Flow (JICF)

Bravo, Luis; Kim, Dokyun; Ham, Frank; Kerner, Kevin A.

doi:10.2514/6.2018-4683

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…Surface tension gradients are assumed to be negligible. The solver has been used to simulate a number of liquid jet break-up problems involving primary atomization, including laminar, transitional and turbulent jets in quiescent gas (Bravo et al 2015(Bravo et al , 2016(Bravo et al , 2018b(Bravo et al , 2019, jets in cross-flows (Bravo et al 2018a) as well as jets from swirling injectors (Kim et al 2014;Ham et al 2014).…”

Section: The Breaking-wave Simulation Ensemblesmentioning

confidence: 99%

The turbulent bubble break-up cascade. Part 2. Numerical simulations of breaking waves

et al. 2021

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Section: The Breaking-wave Simulation Ensemblesmentioning

confidence: 99%

The turbulent bubble break-up cascade. Part 2. Numerical simulations of breaking waves

et al. 2021

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“…Further details of the Lagrangian particle tracking methodology in Ref. [39]. A Voronoi approach is used to generate the mesh topology.…”

Section: Les Methodsmentioning

confidence: 99%

Physical aspects of CMAS particle dynamics and deposition in turboshaft engines

et al. 2020

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“…Atomization process is severely important, but also quite challenging [6]. The breakup of liquid jets in crossflow (JICF) is considered a complex multiscale phenomenon playing a relevant role in several applications [7]. Atomizing liquid jets are frequently occurring in a number of industrial applications.…”

Section: Liquid Breakup and Spray Formationmentioning

confidence: 99%

“…It is known that liquid jets with transverse injection provide high atomization efficiency and droplet generation due to the enhanced interaction of aerodynamic shear forces between the liquid jet and the crossflows [7]. Since it enhances turbulence, it has several applications for mixing in engineering.…”

Section: Liquid Breakup and Spray Formationmentioning

confidence: 99%

“…According to Grosshans [8], the main characteristics of a primary breakup of a fuel jet is the breakup length and droplet diameter, since it is important to combustion processes efficiency. The amount and sizes of droplets in liquid-fueled systems are crucial parameters related to the performance characteristics in engines [7] since the characteristics of the multiple droplets significantly modify these environments [9]. In addition, liquid spray penetration is a very relevant parameter in engineering applications related to JICF because it is often used to indicate the potential for efficient fuel-air mixing [14].…”

Section: Liquid Breakup and Spray Formationmentioning

confidence: 99%

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Primary atomization of a turbulent liquid jet in crossflow: a comparison between VOF and FGVT methods

Duarte

Barbi

Villar

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The primary atomization of a turbulent liquid jet in crossflow was investigated using a mathematical, numerical and computational model. A comparison between the standard volume of fluid (VOF) method and the fine grid volume tracking (FGVT) method was reported. The FGVT method advects the interface between two fluids using a finer grid than the employed by the standard VOF method, and according to the literature, it provides a better interface resolution. Simulations were performed using adaptive mesh refinement in a three-dimensional domain subjected to gravitational field using the in-house code MFSim. The flow was modeled using an Eulerian-Lagrangian approach to capture the interface. The interface was tracked initially with VOF or FGVT methods until the initial breakup. Broken off, small-scale nearly spherical drops were transferred into the Lagrangian point particle description. Column breakup and shear breakup modes were observed on the liquid jet. Drops were small as one-hundredth the size of the injector diameter. The model was validated against experimental correlations for the liquid jet column trajectory, and the droplet size distribution was compared to a previous numerical study from the literature. In addition, the breakup mechanisms predicted were qualitatively compared to those in previous reports. The results of the liquid column trajectory from the simulations performed presented low differences with the literature for both methods tested. According to the numerical results obtained from the computational simulations, the liquid column trajectory was well captured and the droplet size distribution was similar to the literature; however, the FGVT method provided higher accuracy compared to VOF method. The two main breakup modes were identified, namely the column breakup with Kelvin-Helmholtz instabilities and the surface breakup with the formation of multiple ligaments which later lead to droplet formation. The FGVT method provided a more detailed interface contour and improved the number of droplets converted from the Eulerian to the Lagrangian approach compared to the standard VOF method. On the other hand, the FGVT method presented relatively higher computational costs compared to VOF. Therefore, the FGVT method presented a higher interface quality and allowed a larger number of droplet conversion to the Lagrangian approach compared to the VOF method, even though the simulation run time using VOF was lower than with FGVT.

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High Fidelity Simulations of Primary Breakup and Vaporization of Liquid Jet in Cross Flow (JICF)

Cited by 6 publications

References 16 publications

The turbulent bubble break-up cascade. Part 2. Numerical simulations of breaking waves

The turbulent bubble break-up cascade. Part 2. Numerical simulations of breaking waves

Physical aspects of CMAS particle dynamics and deposition in turboshaft engines

Primary atomization of a turbulent liquid jet in crossflow: a comparison between VOF and FGVT methods

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