Multiscale Eulerian-Lagrangian method for parallel simulation of atomization induced by air-blast planar injectors

Sarthou, Arthur; Zuzio, Davide; Estivalèzes, Jean-Luc

doi:10.2514/6.2013-2596

“…The coupled Level-Set/Volume-Of-Fluid (CLSVOF) formulation is used in reason of its accurate description of the interface shape, given by the Level-Set function, and the crucial mass conservation properties given by the VOF. The chosen implementation of the CLSVOF follows [8] and the improved version from [34], with some further modifications described in [36]. The Level-Set function φ(x, t) gives implicitly the interface position, as it is defined as a signed distance to the interface.…”

Section: Interface Trackingmentioning

confidence: 99%

“…The oscillation frequency of the simulation (table 3) is quite higher than the measured one, while the breakup length is underestimated. This seems to be a recurrent problem in two phase DNS simulations of liquid sheet atomization ( [46], [47], [36], [48]). Possibly, the scale in the physical parameters of the simulation should be somehow taken in account in the frequency computation.…”

Section: Gas Reynoldsmentioning

confidence: 99%

See 1 more Smart Citation

An improved multiscale Eulerian–Lagrangian method for simulation of atomization process

Zuzio

¹

,

Estivalèzes

²

,

DiPierro

³

2018

Self Cite

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The physics of atomization process involve many spatial scales, generating a wide variety of liquid inclusions of different sizes with large density and viscosity ratios between liquid and gas phases. To correctly capture the dynamics of these phenomena, each scale should be resolved with an appropriate method to ensure the conservation of physical quantities (mass, momentum) as well as the jump conditions across the liquid-gas interface. To address these problems, an original multi-scale methodology has been developed. It consists of a core coupled Level-Set/Volume-of-Fluid method (CLSVOF) for accurate capture of primary atomization, an adaptive mesh refinement technique (oct-tree AMR) to dynamically optimize the structured Cartesian mesh and a particle tracking algorithm to capture droplet dynamics. An improved Eulerian-Lagrangian coupling has been developed to assure a smooth transition between the Eulerian and the Lagrangian modelling of the droplets, where both methods approach their design limits. The overall procedure is tested on simplified numerical tests and validated on a realistic planar liquid sheet atomization case. Results show its ability to reproduce the whole atomization process, from large scale instabilities to small droplet dynamics, and allow a preliminary statistical spray analysis.

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“…The state‐of‐the‐art applications of the Eulerian–Lagrangian (E‐L) hybrid method [ 28,33,34,42,47–55 ] …”

Section: Applications and Relevant Issuesmentioning

confidence: 99%

“…After testing, they thought it was a good tool for predicting of complex spray dynamics. Zuzio et al [51][52][53][54][55] have also done excellent work. As example, Figure 12E shows the simulated atomization process in the figure of planner-flow according to the actual liquid sheet injector device.…”

Section: State Of the Artmentioning

confidence: 99%

Recent advances in hybrid Eulerian–Lagrangian description of atomization

Wang

¹

,

Jin

²

,

Chai

³

et al. 2022

Can J Chem Eng

0

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Atomization of liquid fuel is a crucial process to energy utilization. A thorough understanding of the physics of liquid atomization is challenging to acquire but necessary. During the past decades, numerical simulation methods for atomization with interface capturing schemes have been developed rapidly. However, several remaining issues need to be highlighted, such as the minimum size of the droplet to capture, numerical mass defects, and others. Thus, those simulations have been mostly limited to the primary breakup process and cannot capture the huge number of tiny droplets during the secondary breakup process. In recent years, a Eulerian-Lagrangian description of atomization has been introduced for the multi-scale modelling of its whole process, in which the primary atomization process is treated in the Eulerian framework while the secondary atomization is treated in

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An Improved Multiscale Eulerian-Lagrangian Method for Simulation of Atomization Process

Estivalèzes

¹

,

Zuzio

²

,

DiPierro

³

2017

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

View full text Add to dashboard Cite

The physics of atomization process involve many spatial scales, generating a wide variety of liquid inclusions of different sizes with large density and viscosity ratios between liquid and gas phases. To correctly capture the dynamics of these phenomena, each scale should be resolved with an appropriate method to ensure the conservation of physical quantities (mass, momentum) as well as the jump conditions across the liquid-gas interface. To address these problems, an original multi-scale methodology has been developed. It consists of a core coupled Level-Set/Volume-of-Fluid method (CLSVOF) for accurate capture of primary atomization, an adaptive mesh refinement technique (oct-tree AMR) to dynamically optimize the structured Cartesian mesh and a particle tracking algorithm to capture droplet dynamics. An improved Eulerian-Lagrangian coupling has been developed to assure a smooth transition between the Eulerian and the Lagrangian modelling of the droplets, where both methods approach their design limits. The overall procedure is tested on simplified numerical tests and validated on a realistic planar liquid sheet atomization case. Results show its ability to reproduce the whole atomization process, from large scale instabilities to small droplet dynamics, and allow a preliminary statistical spray analysis.

show abstract

Multiscale Eulerian-Lagrangian method for parallel simulation of atomization induced by air-blast planar injectors

Cited by 3 publications

References 14 publications

An improved multiscale Eulerian–Lagrangian method for simulation of atomization process

An improved multiscale Eulerian–Lagrangian method for simulation of atomization process

Recent advances in hybrid Eulerian–Lagrangian description of atomization

An Improved Multiscale Eulerian-Lagrangian Method for Simulation of Atomization Process

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