A 3D, fully Eulerian, VOF-based solver to study the interaction between two fluids and moving rigid bodies using the fictitious domain method

Pathak, Ashish; Raessi, Mehdi

doi:10.1016/j.jcp.2016.01.025

Cited by 44 publications

(28 citation statements)

References 65 publications

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“…In this study, an in-house multiphase flow solver 20 is used, which solves the full Navier–Stokes equations for an incompressible immiscible flow in a fully Eulerian framework. With such assumptions, the conservation of mass and momentum, equations (1) and (2), respectively, are solved numerically…”

Section: Methodsmentioning

confidence: 99%

Computational characterization of the secondary droplets formed during the impingement of a train of ethanol drops

Markt

Pathak

Raessi

et al. 2019

International Journal of Engine Research

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This article uniquely characterizes the secondary droplets formed during the impingement of a train of ethanol drops, using three-dimensional direct numerical simulations performed under conditions studied experimentally by Yarin and Weiss. Our numerical results have been previously validated against experimental data demonstrating the ability to accurately capture the splashing dynamics. In this work, the predictive ability of the model is leveraged to gain further insight into secondary droplet formation. We present a robust post-processing algorithm, which scrutinizes the liquid volume fraction field in the volume-of-fluid method and quantifies the number, volume and velocity of secondary droplets. The high-resolution computational simulations enable secondary droplet characterization within close proximity of the impingement point at small length and time scales, which is extremely challenging to achieve experimentally. By studying the temporal evolution of secondary droplet formation, direct connections are made between liquid structures seen in the simulation and the instantaneous distribution of secondary droplets, leading to detailed insight into the instability-driven breakup process of lamellae. Time-averaged secondary droplet characteristics are also studied to describe the global distribution of secondary droplets. Such analysis is vital to understanding fuel drop impingement in direct injection engines, facilitating the development of highly accurate spray–wall interaction models for use in Lagrangian solvers.

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Section: Methodsmentioning

confidence: 99%

Computational characterization of the secondary droplets formed during the impingement of a train of ethanol drops

Markt

Pathak

Raessi

et al. 2019

International Journal of Engine Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…Real earthquake data was applied to a tank that had an elastic buffer in the middle. Various numerical models to couple fluid-structure interaction problems, such as MPS-FEM coupling [21] or immersed boundary methods combined with volume of fluid or level-set approaches [22][23][24], have been proposed in the literature [25]. In the present numerical model, smoothed particle hydrodynamics was coupled with the finite element method, and the coupling was satisfied with contact mechanics [26,27].…”

Section: Introductionmentioning

confidence: 98%

Investigation of the Sloshing Behavior Due to Seismic Excitations Considering Two-Way Coupling of the Fluid and the Structure

Dinçer

2019

Water

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Sloshing behavior due to near-fault type and earthquake excitations of a fluid in a tank having a highly deformable elastic structure in the middle was investigated experimentally and numerically in this paper. In the numerical model, fluid was simulated with smoothed particle hydrodynamics (SPH) and structure was simulated with the finite element method (FEM). The coupling was satisfied with contact mechanics. The δ-SPH scheme was adapted to lower the numerical oscillations. The proposed fluid-structure interaction (FSI) method can simulate the violent fluid-structure interaction problem successfully. The effects of near-fault type and earthquake excitations on free-surfaces of fluid and the elastic structure are presented.

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“…[12][13][14][15] When a fluidfluid interface or a free surface appears, the flow solver has to be extended, e.g., via a level-set method 2,3 or a volume-of-fluid approach. 16 With respect to the sloshing phenomena, different approaches have been developed to predict the interface behavior. Some solutions derived from potential flow theory, where the fluid is assumed to be incompressible and inviscid, have been obtained and applied to particular tank shapes, filling levels, and excitation directions.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study of the motion of a sphere in a communicating vessel system subject to sloshing

et al. 2019

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A 3D, fully Eulerian, VOF-based solver to study the interaction between two fluids and moving rigid bodies using the fictitious domain method

Cited by 44 publications

References 65 publications

Computational characterization of the secondary droplets formed during the impingement of a train of ethanol drops

Computational characterization of the secondary droplets formed during the impingement of a train of ethanol drops

Investigation of the Sloshing Behavior Due to Seismic Excitations Considering Two-Way Coupling of the Fluid and the Structure

Numerical and experimental study of the motion of a sphere in a communicating vessel system subject to sloshing

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