Open-Cell Metal Foam Mesh Generation for Lattice Boltzmann Simulations

Festuccia, Alessio; Chiappini, Daniele; Bella, Gino

doi:10.1615/jpormedia.v21.i5.30

Cited by 6 publications

(2 citation statements)

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“…The second application which has been implemented and analysed is the injection in a porous domain. As already stated in §2d, the porous domain has been modelled through the random packing spheres approach, widely used to characterize fluid dynamics of open-cell metal foams [38,69,71]. With respect to metal foam characteristics two main quantities are generally needed for their characterization: the porosity ϵ , which represents the ratio between air and metal volumes, and the PPI distribution, which gives information about the number of pores present in a linear inch [72,73].…”

Section: Resultsmentioning

confidence: 99%

A lattice-Boltzmann free surface model for injection moulding of a non-Newtonian fluid

Chiappini

2020

Phil. Trans. R. Soc. A.

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The aim of this work is to present a lattice Boltzmann (LB) model devoted to dealing with non-Newtonian free surface flow. The combination of LB solver with a free-surface model allows dealing with multiphase flows where the density ratio in between the two considered phases is so high that the lighter phase can be neglected. For this particular set of multiphase models, the interface between the two phases is numerically reconstructed and transported via a diffusion equation. Moreover, the application of a Carreau approach for viscosity modelling allows the introduction of effects related to shear stress on fluid flow evolution. Two different non-Newtonian silicon-like materials have been considered here, namely the polystyrene and acrylonitrile butadiene styrene. Here, the author, after the mandatory model validation with a reference configuration, presents some applications of injection moulding for two different test-cases: the former is the injection in a labyrinth-like gasket, whereas the latter is the injection in a porous media. This article is part of the theme issue ‘Fluid dynamics, soft matter and complex systems: recent results and new methods’.

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Section: Resultsmentioning

confidence: 99%

A lattice-Boltzmann free surface model for injection moulding of a non-Newtonian fluid

Chiappini

2020

Phil. Trans. R. Soc. A.

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“…In this study, we reconstruct a 150-μm-thick GDL structure with a fiber diameter of 10 μm and a porosity of 78%. The representative unit cell structure [49][50][51] is adopted to reconstruct the metal foam structures. In this study, the tetrakaidecahedron is selected as the representative unit cell.…”

Section: Details Of Numerical Simulationmentioning

confidence: 99%