Performance portability of lattice Boltzmann methods for two-phase flows with phase change

Verdier, Werner; Kestener, Pierre; Cartalade, Alain

doi:10.1016/j.cma.2020.113266

Cited by 16 publications

(5 citation statements)

References 65 publications

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“…Thus the same code can be run either on multi-CPU partition or on multi-GPU partition of a supercomputer. Time performances of LBM_Saclay have been compared between graphic cards and standard CPU in our previous paper [29]. Because of the efficiency of the former ones, the simulations of this work have run on the multi-GPU partitions of the supercomputers Jean-Zay (IDRIS, France) and Topaze (CCRT, France).…”

Section: Numerical Simulationsmentioning

confidence: 99%

“…Then, we present simulations of domain coarsening, in two dimension without fluid flow as a benchmark, and in three dimensions with fluid flow, in a large system which contains many droplets. These simulations are carried out with the high-performance computing code LBM_Saclay [29]. These illustrative simulations demonstrate that our code can be used to perform large-scale studies, and thus is a suitable tool for the investigation of practical problems.…”

Section: Introductionmentioning

confidence: 98%

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Grand-potential phase field simulations of droplet growth and sedimentation in a two-phase ternary fluid

Verdier,

Cartalade,

Plapp

2024

Modelling Simul. Mater. Sci. Eng.

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A methodology is built to model and simulate the dynamics of domain coarsening of a two-phase ternary liquid with an arbitrary phase diagram. High numerical performance is obtained through the use of the phase field-method for interface capturing, a lattice Boltzmann method numerical scheme for all the model equations, and a portable, parallel simulation code running on multiple GPUs. The model is benchmarked against an analytic solution for a ternary diffusion couple. It also reproduces the well-known power law for droplet coarsening during Ostwald ripening without fluid flow. Large-scale simulations with flow illustrate the effects of momentum transport and buoyancy, as well as droplet coalescence and sedimentation.

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Section: Numerical Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Grand-potential phase field simulations of droplet growth and sedimentation in a two-phase ternary fluid

Verdier,

Cartalade,

Plapp

2024

Modelling Simul. Mater. Sci. Eng.

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“…Different from N-S solvers, the LBM is sourced from the kinetic theory and the governing equations can be solved directly in an explicit way. This feature ensures efficiency in computing and simplicity in programming and has led the LBM to be a popular method in recent decades (Guo et al 2002;Mehravaran and Hannani 2008;Huang et al 2009b;Lee and Liu 2010;Zhou et al 2012;Galindo-Torres et al 2013;Lin et al 2013;Galindo-Torres 2013;Galindo-Torres et al 2016;de Rosis 2017;Yang et al 2018Yang et al , 2019Chen et al 2020;Verdier et al 2020;Ru et al 2021;Wang et al 2021;Zhang et al 2021). Chen et al developed an improved version of the simplified LBM (SLBM) (Chen et al 2017(Chen et al , 2018Chen and Shu 2020a, b).…”

Section: Article Highlightsmentioning

confidence: 99%

Numerical Investigation on the Deformation of the Free Interface During Water Entry and Exit of a Circular Cylinder by Using the Immersed Boundary-Multiphase Lattice Boltzmann Flux Solver

Zhang

Yan

Song

et al. 2022

J. Marine. Sci. Appl.

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In this work, the deformation of free interface during water entry and exit of a circular cylinder is investigated numerically by using the two-dimensional (2D) immersed boundary-multiphase lattice Boltzmann flux solver (IB-MLBFS). The fluid domain is discretized by finite volume discretization, and the flux on the grid interface is evaluated by lattice Boltzmann equations. Both the implicit velocity correction and the surface flux correction are implemented by using the immersed boundary-method to consider the fluid-structure interaction and the contact interface between the multiphase fluids and the structure. First, the water entry of a circular cylinder is simulated and the results are compared with the experiment, which considered the length-diameter ratio of the circular cylinder. The reliability of 2D simulation is verified and the deformation of the free interface is well investigated. Afterward, the water exit of a circular cylinder with constant velocity is simulated, which is less researched. In addition, the results show the advantage of present IB-MLBFS to some extent. Finally, the water exit and re-entry of a circular cylinder are presented, and the results present the complex deformation of the free interface and the dynamic response of the moving structure. Based on the numerical results, the free interface of the multiphase fluids is well captured, and the contact interface on the boundary of the moving structure is accurately presented by the IB-MLBFS.

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“…For modifying coupling terms and adding more equations require new C++ programming and a code compilation. The code has already been used to study two-phase flows with phase change in the framework of the phase-field method [26].…”

Section: Short Description Of Lbm_saclaymentioning

confidence: 99%

“…The model is implemented in LBM_saclay, a numerical code running on various High Performance Computing architectures. With simple modifications of compilation flags, the code can run on CPUs (Central Process Units) or GPUs (Graphics Process Units) [26]. The LBM schemes of phasefield model are presented in Section 3.…”

Section: Introductionmentioning

confidence: 99%

Grand-potential-based phase-field model of dissolution/precipitation: lattice Boltzmann simulations of counter term effect on porous medium

Boutin¹,

Verdier²,

Cartalade³

2021

Preprint

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Most of the lattice Boltzmann methods simulate an approximation of the sharp interface problem of dissolution and precipitation. In such studies the curvature-driven motion of interface is neglected in the Gibbs-Thomson condition. In order to simulate those phenomena with or without curvature-driven motion, we propose a phase-field model which is derived from a thermodynamic functional of grand-potential. Compared to the well-known free energy, the main advantage of the grand-potential is to provide a theoretical framework which is consistent with the equilibrium properties such as the equality of chemical potentials. The model is composed of one equation for the phase-field φ coupled with one equation for the chemical potential µ. In the phase-field method, the curvature-driven motion is always contained in the phase-field equation. For canceling it, a counter term must be added in the φ-equation. For reason of mass conservation, the µ-equation is written with a mixed formulation which involves the composition c and the chemical potential. The closure relationship between c and µ is derived by assuming quadratic free energies of bulk phases. The anti-trapping current is also considered in the composition equation for simulations with null diffusion in solid. The lattice Boltzmann schemes are implemented in LBM_saclay, a numerical code running on various High Performance Computing architectures. Validations are carried out with several analytical solutions representative of dissolution and precipitation. Simulations with or without counter term are compared on the shape of porous medium characterized by microtomography. The computations have run on a single GPU-V100.

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Performance portability of lattice Boltzmann methods for two-phase flows with phase change

Cited by 16 publications

References 65 publications

Grand-potential phase field simulations of droplet growth and sedimentation in a two-phase ternary fluid

Grand-potential phase field simulations of droplet growth and sedimentation in a two-phase ternary fluid

Numerical Investigation on the Deformation of the Free Interface During Water Entry and Exit of a Circular Cylinder by Using the Immersed Boundary-Multiphase Lattice Boltzmann Flux Solver

Grand-potential-based phase-field model of dissolution/precipitation: lattice Boltzmann simulations of counter term effect on porous medium

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