Pierre Boivin

Pierre Boivin
Aix-Marseille Université | AMU · Laboratoire de Mécanique, Modélisation et Procédés Propres (UMR 7340)

PhD - HDR
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About

47
Publications
15,390
Reads
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820
Citations
Additional affiliations
October 2016 - present
Aix-Marseille Université
Position
  • CNRS Researcher
September 2015 - September 2016
Aix-Marseille Université
Position
  • PostDoc Position
October 2014 - August 2015
Aix-Marseille Université
Position
  • PostDoc Position
Education
January 2009 - December 2011
University Carlos III de Madrid
Field of study
  • Combustion
August 2006 - September 2008
KTH Royal Institute of Technology
Field of study
  • Aeronautical and Vehicle Engineering
September 2003 - September 2007
École Polytechnique
Field of study
  • Fluid Mechanics

Publications

Publications (47)
Article
Full-text available
We present possibly for the first time Lattice-Boltzmann numerical simulations of thermo-acoustic instabilities of premixed flames. We study flames interacting with an imposed acoustic field where flames submitted to a para-metric instability can be observed, as well as plane flames re-stabilized by the acoustic forcing. Self-induced thermo-acousti...
Article
Full-text available
A general methodology is introduced to build conservative numerical models for fluid simulations based on segregated schemes, where mass, momentum and energy equations are solved by different methods. It is here especially designed for developing new numerical discretizations of the total energy equation, adapted to a thermal coupling with the latt...
Article
Full-text available
The pressure-based hybrid lattice-Boltzmann method presented by Farag & al (Phys. Fluids 2020) is assessed for the simulation of buoyancy driven flows. The model is first validated on Rayleigh-Benard and Rayleigh-Taylor two-dimensional cases. A large-eddy simulation of a turbulent forced plume is then carried out, and results are validated against...
Article
Full-text available
This numerical study deals with the hazardous ignition of a jet flame in a vitiated co-flow. A novel formulation, based on a passive scalar variable, will be presented to predict hydrogen auto-ignition events. The model, derived from the theoretical analysis of the Jacobian, correctly describes the appearance and absence of auto-ignition in complex...
Chapter
This chapter provides an overview of H2 ignition and safety-related ques- tions, to be addressed in the development of future H2 thermal engines. Basics of H2 ignition phenomena are covered in the first part, including the well-known branched- chain oxidation reactions described by Semenov & Hinshelwood, as well as useful analytical derivations of...
Article
Full-text available
A new OpenFOAM solver is presented, for the simulation of plasma cutting torches. The mathematical model that is introduced is based on the compressible Navier–Stokes equations coupled via source terms to the electric current conservation equation. Due to the conservative and hyperbolic nature of the model, a Godunov-type scheme is used for the fir...
Article
Full-text available
A new low-Mach algorithm based on thermal Lattice Boltzmann method (LBM) is proposed aiming at reducing the computational cost of thermal flow simulations in low Mach number limit.Considering the time-step restriction of fully compressible solvers, the Low Mach Number Approximation (LMNA) allows to accelerate significantly the simulations by re-sca...
Article
This work focuses on the supercritical region of fluid phase equilibria, just above the critical point. It is already known that in this area, two different zones can be distinguished, one where supercritical fluids (SCFs) have liquid-like properties, and the other one where SCFs have gas-like properties; these two zones being delimited by the Wido...
Article
Full-text available
A D3Q19 Hybrid Recursive Regularized Pressure based Lattice Boltzmann Method (HRR-P LBM) is assessed for the simulation of complex transonic flows. Mass and momentum conservation equations are resolved through a classical LBM solver coupled with a finite volume resolution of entropy equation for a complete compressible solver preserving stability,...
Article
Full-text available
This article presents a revised formulation of the color gradient method to model im-miscible two-phase flows in the Lattice-Boltzmann framework. Thanks to this formulation, the Colour-Gradient method is generalised to an arbitrary Equation of State under the form p = f (ρ, φ), relieving the non-physical limitation between density and sound speed r...
Article
Full-text available
A unified expression for high-speed compressible segregated consistent lattice Boltzmann methods, namely pressure-based and improved density-based methods, is given. It is theoretically proved that in the absence of forcing terms these approaches are strictly identical and can be recast in a unique form. An important result is that the difference w...
Article
Full-text available
This letter reports a validation of a Lattice-Boltzmann approach following the Taylor-Green Vortex benchmark presented at the 19th International Congress on Numerical Combustion, and recently reported by Abdelsamie et al. in Computers & Fluids, 223, p. 104935 (2021). The Lattice-Boltzmann approach, despite having a time-step bound by an acoustic Co...
Article
Full-text available
A new compressible pressure-based Lattice Boltzmann Method is proposed to simulate humid air flows with phase change. The variable density and compressible effects are fully resolved, effectively lifting the Boussinesq approximation commonly used, e.g. for meteorological flows. Previous studies indicate that the Boussinesq assumption can lead to er...
Article
Full-text available
Owing to the lack of consensus about the way Chapman-Enskog should be performed, a new Taylor-Expansion of Lattice-Boltzmann models is proposed. Contrarily to the Chapman-Enskog expansion, recalled in this manuscript, the method only assumes an su ciently small time step. Based on the Taylor expansion, the collision kernel is rein-terpreted as a cl...
Article
Full-text available
This letter reports the first large eddy simulation of a turbulent flame using a Lattice-Boltzmann model. To that end, simulation of a bluff-body stabilized propane-air flame is carried out, showing an agreement similar to those available in the literature. Computational costs are also reported, indicating that Lattice-Boltzmann modelling of reacti...
Article
Full-text available
This article presents a new numerical scheme designed to solve for any scalar equation coupled with a lattice Boltzmann solver (in so-called hybrid methods). Its most direct application is solving an energy equation, in parallel with a lattice Boltzmann solver, dealing with mass and momentum conservation. The numerical scheme is specifically design...
Article
Full-text available
We present an experimental and numerical investigation of the Darrieus-Landau instability in a quasi two-dimensional Hele-Shaw cell. Experiments and Lattice-Boltzmann numerical simulations are compared with Darrieus-Landau analytical theory, showing an excellent agreement for the exponential growth rate of the instability in the linear regime. The...
Article
Full-text available
A new pressure-based Lattice-Boltzmann method (HRR-p) is proposed for the simulation of flows for Mach numbers ranging from 0 to 1.5. Compatible with nearest neighbor lattices (e.g. D3Q19), the model consists of a predictor step comparable to classical athermal Lattice-Boltzmann methods, appended with a fully local and explicit correction step for...
Article
Full-text available
In order to simulate cryogenic H2−O2 jets under subcritical condition, a numerical model is constructed to solve compressible reactive multi-component flows which involve complex multi-physics processes such as moving material interfaces, shock waves, phase transition and combustion. The liquid and reactive gaseous mixture are described by a homoge...
Article
Full-text available
A Lattice-Boltzmann model for low-Mach reactive flows is presented, built upon our recently published model (Comb & Flame, 196, 2018). The approach is hybrid and couples a Lattice-Boltzmann solver for the resolution of mass and momentum conservation and a finite difference solver for the energy and species conservation. Having lifted the constant t...
Thesis
My research’s objective is the development of modelling methods for multi- phase reactive flows in the presence of interfaces. Such complex flows are present in many applications. In cryogenic rocket engines, for instance, liquid oxygen is injected straight into the combustion chamber. The liquid jet is then strongly destabilized and atomized, befo...
Article
Full-text available
An extended version of the hybrid recursive regularized lattice-Boltzmann model which incorporates external force is developed to simulate humid air flows with phase change mechanisms under the Boussinesq approximation. Mass and momentum conservation equations are solved by a regularized lattice Boltzmann approach well suited for high Reynolds numb...
Article
Full-text available
The canonical interaction between a two-dimensional weak Gaussian disturbance (en-tropy spot, density spot, weak vortex) with an exothermic/endothermic planar shock wave is studied via the Linear Interaction Approximation. To this end, a unified framework based on an extended Kovasznay decomposition that simultaneously accounts for non-acoustic den...
Article
Full-text available
A thermal lattice Boltzmann model with a hybrid recursive regularization (HRR) collision operator is developed on standard lattices for simulation of subsonic and sonic compressible flows without shock. The approach is hybrid: mass and momentum conservation equations are solved using a lattice Boltzmann solver, while the energy conservation is solv...
Article
Full-text available
This study proposes a new formulation for the Harten, Lax, and van Leer (HLL) type Riemann solver which is capable of solving contact discontinuities accurately but with robustness for strong shock. It is well known that the original HLL, which has incomplete wave structures, is too dissipative to capture contact discontinuities accurately. On the...
Article
Full-text available
Previously [1] we have shown how a single species X can be introduced, representing either HO 2 for high-temperature ignition or H 2 O 2 for low-temperature ignition, to develop an algorithm that covers the entire range of ignition, flame-propagation, and combustion conditions, without a significant degradation of accuracy, for hydrogen-air systems...
Article
Full-text available
A new Lattice-Boltzmann model for low-Mach reactive flows is presented. Based on standard lattices, the model is easy to implement, and is the first, to the authors' knowledge, to pass the classical freely propagating flame test case as well as the counterflow diffusion flame, with strains up to extinction. For this presentation, simplified transpo...
Article
Full-text available
A simple thermodynamic closure for the simulation of multiphase reactive flows is presented. It combines a fully explicit thermodynamic closure appropriate for weakly thermal multiphase flow simulations, with the classical variable heat capacity ideal gas thermodynamic closure, commonly used for reactive flows simulations. Each liquid and gas compo...
Article
Full-text available
The present paper aims at building a fast and accurate phase transition solver dedicated to unsteady multiphase flow computations. In a previous contribution (Chiapolino et al. 2017), such a solver was successfully developed to compute thermodynamic equilibrium between a liquid phase and its corresponding vapor phase. The present work extends the s...
Chapter
Full-text available
A flow model is derived for the numerical simulation of interfacial flows with phase transition. The model arises from the classical multi-component Euler equations, but is associated to a non-classical thermodynamic closure: each phase is compressible and evolves in its own subvolume, with phases sharing common pressure, velocity and temperature,...
Article
Full-text available
Computations indicate that, under all possible conditions of practical interest, including temperatures both above and below the crossover temperature at which the rates of the H2 + O2 branching and termination steps are equal, twelve irreversible elementary steps suffice to provide accurate values of induction times in autoignition processes of fu...
Article
Determining liquid-vapor phase equilibrium is often required in multiphase flow computations. Existing equilibrium solvers are either accurate but computationally expensive, or cheap but inaccurate. The present paper aims at building a fast and accurate specific phase equilibrium solver, specifically devoted to unsteady multiphase flow computations...
Article
Full-text available
Determining liquid-vapor phase equilibrium is often required in multiphase flow computations. Existing equilibrium solvers are either accurate but computationally expensive, or cheap but inaccurate. The present paper aims at building a fast and accurate specific phase equilibrium solver, specifically devoted to unsteady multiphase flow computations...
Article
A flow model is derived for the numerical simulation of multi-phase flows with phase transition. The model arises from the classical multi-component Euler equations, but is associated to a non-classical thermodynamic closure: each phase is compressible and evolves in its own subvolume, with phases sharing common pressure, velocity and temperature,...
Article
Full-text available
Although impressive advances have been achieved in the area of tabulated chemistry for turbulent combustion modeling, table generation remains a tedious task, sometimes as costly as the computation itself. In this work, we intend to offer an alternative to tabulation, applied to the MIL turbulent combustion model. An explicit expression for chemica...
Article
Explicit expressions for chemical times relative to ignition, as functions of pressure, temperature and reactants concentrations are derived for hydrogen, methane and decane. They stem from an eigenvalue analysis, similar to that used in the Computational Singular Perturbation method among others. Significant simplification arises from neglecting h...
Article
The feasibility of developing multipurpose reduced chemistry that is able to describe, with sufficient accuracy, premixed and non-premixed flames, one-dimensional detonations, high-temperature autoignition, and also low-temperature autoignition is explored. A four-step mechanism with O and OH in steady state is thoroughly tested and is shown to giv...
Article
The ignition time of hydrogen–air diffusion flames is a quantity of utmost interest in a large number of applications, with implications regarding the viability of supersonic combustion and the safe operation of gas turbines. The underlying chemistry and the associated ignition history are very different depending on the initial temperature and pre...
Article
Full-text available
A three-step mechanism for H2-air combustion (Boivin et al., Proc. Comb. Inst. 33 (2010)) was recently designed to reproduce both autoignition and flame propagation, essential in lifted flame stabilization. To study the implications of the use of this reduced chemistry in the context of a turbulent flame simulation, this mechanism has been implemen...
Article
This paper addresses homogeneous ignition of hydrogen–oxygen mixtures when the initial conditions of temperature and pressure place the system below the crossover temperature associated with the second explosion limit. A three-step reduced mechanism involving H2, O2, H2O, H2O2 and HO2, derived previously from a skeletal mechanism of eight elementar...
Article
Full-text available
For hydrogen–oxygen–inert systems, just as for other fuel–oxidizer mixtures, systematically reduced chemistry has in the past been developed separately for premixed and diffusion flames and for autoignition. In computational work that addresses turbulent combustion or the transition from deflagration to detonation, however, autoignition and flames...
Thesis
Full-text available
Reduced chemical-kinetic mechanisms are investigated for hydrogen and syngas combustion to fill the need for simplified chemistry able to describe with accuracy both premixed and diffusion flames and also autoignition, necessitated for instance in computational work that addresses turbulent combustion or the transition from deflagration to detonati...
Article
Full-text available
A four-step reduced chemical-kinetic mechanism for syngas combustion is proposed for use under conditions of interest for gas-turbine operation. The mechanism builds upon our recently published three-step mechanism for H2–air combustion (Boivin et al., Proc. Comb. Inst. 33, 2010), which was derived from a 12-step skeletal mechanism by assuming O, O...

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Projects

Projects (3)
Project
Towards extending the capabilities of LBM to reactive and compressible flows.
Project
develop reduced kinetics models compatible with most codes used for simulating reactive flows
Project
Propose a numerical framework simultaneously compatible of multiphase and reactive flows.