A coupled Volume of Fluid and Immersed Boundary Method for simulating 3D multiphase flows with contact line dynamics in complex geometries

Patel, H.V.; Das, Soumen; Kuipers, J.A.M.; Padding, JT Johan; Peters, E.A.J.F.

doi:10.1016/j.ces.2017.03.012

Cited by 65 publications

(28 citation statements)

References 32 publications

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“…Therefore, the model for the substrate motion considered in this paper could provide insight into the early time dynamics of droplet impact onto the end of cantilever beams. In addition, there is much scope to extend these models to more complex substrates, such as elastic membranes under tension, as previously studied experimentally [9], further guided by recent analytical [37] and computational [31,32] progress. In conclusion, we believe that the proposed mathematical framework embodies productive co-development and investigative interplay between rigorous state-of-the-art methodologies, providing a general and highly efficient route to studying complex systems involving fluid-structure interaction in the future.…”

Section: Summary and Discussionmentioning

confidence: 99%

“…If the substrate only exhibits translational motion (without accounting for bending), then the problem can be simplified by considering a moving frame of reference, centred on the substrate [29], whereas substrates which exhibit bending need to be considered using more complex techniques such as the immersed boundary method [30]. Two-phase flow systems with immersed boundaries have not been studied extensively, with only a few noticeable exceptions [31,32]. Despite considering complex moving boundaries (such as a twin screw kneader), the motion of the boundaries was prescribed rather than resulting from fluid-structure interaction, although the proposed methods could in principle be extended to consider this.…”

Section: Introductionmentioning

confidence: 99%

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Droplet impact onto a spring-supported plate: analysis and simulations

et al. 2021

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The high-speed impact of a droplet onto a flexible substrate is a highly non-linear process of practical importance, which poses formidable modelling challenges in the context of fluid–structure interaction. We present two approaches aimed at investigating the canonical system of a droplet impacting onto a rigid plate supported by a spring and a dashpot: matched asymptotic expansions and direct numerical simulation (DNS). In the former, we derive a generalisation of inviscid Wagner theory to approximate the flow behaviour during the early stages of the impact. In the latter, we perform detailed DNS designed to validate the analytical framework, as well as provide insight into later times beyond the reach of the proposed analytical model. Drawing from both methods, we observe the strong influence that the mass of the plate, resistance of the dashpot, and stiffness of the spring have on the motion of the solid, which undergo forced damped oscillations. Furthermore, we examine how the plate motion affects the dynamics of the droplet, predominantly through altering its internal hydrodynamic pressure distribution. We build on the interplay between these techniques, demonstrating that a hybrid approach leads to improved model and computational development, as well as result interpretation, across multiple length and time scales.

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Section: Summary and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Droplet impact onto a spring-supported plate: analysis and simulations

et al. 2021

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“…Those approaches, which inspire the reconstruction algorithm in this work, are discussed in the following. The idea of PLIC was adapted for two interacting disperse components in a gaseous environment by Pathak and Raessi [18] as well as by Patel et al [19] who utilise the interface normal's calculation from Washino et al [20]. Both propose reconstruction algorithms for three-phase problems.…”

Section: Introductionmentioning

confidence: 99%

New Approaches for the Interface Reconstruction and Surface Force Computation for Volume of Fluid Simulations of Droplet Interaction of Immiscible Liquids

Johanna¹,

Schulte²

2021

Preprint

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The complexity of binary droplet collisions increases for the collision of immiscible liquids with the occurrence of triple lines and thin encapsulating films. The Volume of Fluid (VOF) method is extended with an efficient interface reconstruction applicable to three-component cells of arbitrary configuration. Together with an enhanced Continuous Surface Stress (CSS) model for accurate surface force computation, which was gained by the introduction of a film stabilisation approach, this enables the simulation of the interaction of two droplets of immiscible liquids. With the new methods, simulations of binary droplet collisions of fully wetting liquids were performed with excellent agreement to experimental data in different collision regimes regarding both the morphology and the prediction of the regime boundaries for head-on as well as off-centre collisions.

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“…Particularly, efforts have been made in the context of liquid-gas flows with particles [8][9][10][11][12]. Apart from the method, numerical investigations on the binary interaction of particles and droplets are rather scarce, unlike the droplet-droplet collisions.…”

Section: Introductionmentioning

confidence: 99%

A coupled volume of fluid-fictitious domain method to study droplet-particle interactions at different impact conditions

Saeedipour

Nair

Pirker

2021

ICLASS

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In this study, we present a coupled volume of fluid-fictitious domain method for the simulation of droplet-particle binary interactions. In this approach, the liquid-gas flow is modelled by the VOF method, and the particle presence is introduced to the Eulerian grids by a volume fraction scalar field. The hydrodynamic forces acting on the particle are computed over the particlecovered grids, and particle moves according to Newton's second law. A penalization term is added to the momentum equation at the particle-covered grids via a continuous force field. The VOF algorithm is then modified to prevent the penetration of liquid into the particle region. First, a 3D benchmark problem is tested for validation. Then, a 3D configuration is considered for the droplet-particle interaction where a water droplet and a solid particle constitute a headson binary collision in the surrounding air. The collision behaviour at different impact velocities and droplet-to-particle diameter ratios are pictured, and the outcome regimes are characterized based on impact Weber numbers. The present approach is developed within the opensource C++ libraries of OpenFOAM and LIGGGHTS ® codes and can be further employed for the fully-resolved description of the interfacial physics in droplet-laden flows in the presence of moving particles.

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A coupled Volume of Fluid and Immersed Boundary Method for simulating 3D multiphase flows with contact line dynamics in complex geometries

Cited by 65 publications

References 32 publications

Droplet impact onto a spring-supported plate: analysis and simulations

Droplet impact onto a spring-supported plate: analysis and simulations

New Approaches for the Interface Reconstruction and Surface Force Computation for Volume of Fluid Simulations of Droplet Interaction of Immiscible Liquids

A coupled volume of fluid-fictitious domain method to study droplet-particle interactions at different impact conditions

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