Simulation of the liquid break-up at an AdBlue injector with the volume-of-fluid method followed by off-line coupled Lagrangian particle tracking

Edelbauer, Wilfried; Birkhold, Felix; Rankel, Thorsten; Pavlović, Zoran; Kolar, Patrick

doi:10.1016/j.compfluid.2017.09.003

Cited by 17 publications

(8 citation statements)

References 36 publications

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“…Introducing the latter two equations into Eq. ( 7) gives (10) The difference in surface energy is then given by (11) Assuming the volume of the spherical cap given by…”

Section: Appendixmentioning

confidence: 99%

“…Computational fluid dynamics constitutes a valuable tool to support the optimization of automotive SCR-systems at various operating conditions [10][11][12][13][14]. The spray is typically modelled with a statistical Lagrange approach in combination with an Eulerian approach for the gas phase, being based either on the Reynolds-averaged Navier-Stokes equations or on large eddy simulation.…”

Section: Introductionmentioning

confidence: 99%

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Spreading and rebound dynamics of sub-millimetre urea-water-solution droplets impinging on substrates of varying wettability

Wörner

Samkhaniani

Cai

et al. 2021

Applied Mathematical Modelling

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“…Introducing the latter two equations into Eq. ( 7) gives (10) The difference in surface energy is then given by (11) Assuming the volume of the spherical cap given by…”

Section: Appendixmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spreading and rebound dynamics of sub-millimetre urea-water-solution droplets impinging on substrates of varying wettability

Wörner

Samkhaniani

Cai

et al. 2021

Applied Mathematical Modelling

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“…For complex interface structures, it requires a significant amount of high-resolution computational grids, which demands a high computational resource. In recent years, the VOF–Lagrangian method − has been proven to be more effective in studying gas–liquid multiphase flows involving a large amount of droplets. For atomization simulations, Ling et al coupled the VOF method with the Lagrangian particle model to resolve large-scale interfaces and represent small droplets, respectively.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Slag Droplet Entrainment by Volume of Fluid and Lagrangian Particle Tracking Coupled Modeling

Wei

Zhu

et al. 2023

ACS Omega

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The slag droplet entrainment is a common phenomenon in steel refining processes, which may lead to inclusions and defects. In the multiphase flow system, the distinct interface and tiny blobs possess a wide range of spatial and temporal scales and make it hard to be simulated. In numerical methods, the volume of fluid (VOF) approach is appropriate for capturing the interface, but for the unresolvable tiny blobs, the Lagrangian particle tracking (LPT) is preferable. This work newly implements a bidirectional VOF−LPT transformation algorithm for developing a multiscale solver in OpenFOAM to simulate the slag droplet entrainment. The interIsoFoam solver is selected as the main solver to resolve the interface, and the resolution is improved with using the geometric reconstruction and the adaptive mesh refinement (AMR). For capturing tiny droplets, a connected component labeling (CCL) method is adopted for detecting discrete droplets in the VOF field, and then the VOF-to-LPT transition takes place for saving computational costs. Conversely, the LPT-to-VOF transformation for droplets touching the interface is also incorporated to achieve the bidirectional transition. The solver is first validated by a simple case, indicating that the two-way transition algorithm and the Eulerian−Lagrangian momentum coupling are accurate. Then the solver is applied to simulate the slag layer behavior for revealing the mechanisms of slag droplet formation and entrainment. Two main mechanisms of slag droplet formation are identified, and it is found that fewer discrete droplets are generated when the surface tension increases.

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“…Tomar et al [7] performed a multi-scale simulation of the primary atomization using a VOF method coupled with a LPT method. W. Eddelbauer et al [8] investigated a low-pressure three holes AdBlue injector, which induces swirl while injecting UWS. The authors used a VOF method followed by an externally coupled LPT method to study the spray breakup.…”

Section: Introductionmentioning

confidence: 99%

Modeling of an Air-Assisted Spray Breakup of Urea-Water Solution for SCR Applications

Naik¹,

Höltermann²,

Lauer³

et al. 2019

Proceedings of the 4th World Congress on Momentum, Heat and Mass Transfer

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In a selective catalytic reduction (SCR) system for large engines, a quicker evaporation of the urea-water solution (UWS) spray can be achieved through injection with air-assistance. It makes the SCR system more compact, which saves space required for its installation and the cost of manufacturing. A validated CFD study for the air-assisted spray breakup of UWS is not available in the existing literature. In the current work, the Lagrangian-particle-tracking (LPT) model along with the blob approach is used to develop a 3D-CFD simulation method, which can predict the air-assisted spray breakup of UWS in SCR systems. The method can predict sauter mean diameter (SMD), arithmetic mean diameter (AMD) and velocity of droplets. Simulations results are in good agreement with phase Doppler anemometry (PDA) measurements carried out at a hot gas test-rig. The method can also predict the influence of operating conditions on the spray characteristics and helps to determine an optimum mass flow rate of compressed air for the spray breakup process in order to get a desired spray angle and droplets sizes. The aim of the study is to develop a 3D-CFD simulation method for prediction of the air-assisted spray breakup of UWS for SCR applications.

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Simulation of the liquid break-up at an AdBlue injector with the volume-of-fluid method followed by off-line coupled Lagrangian particle tracking

Cited by 17 publications

References 36 publications

Spreading and rebound dynamics of sub-millimetre urea-water-solution droplets impinging on substrates of varying wettability

Spreading and rebound dynamics of sub-millimetre urea-water-solution droplets impinging on substrates of varying wettability

Simulation of Slag Droplet Entrainment by Volume of Fluid and Lagrangian Particle Tracking Coupled Modeling

Modeling of an Air-Assisted Spray Breakup of Urea-Water Solution for SCR Applications

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