Discrete Boltzmann modeling of multiphase flows: hydrodynamic and thermodynamic non-equilibrium effects
arXiv:1503.08450 · doi:10.1039/c5sm01125f
Abstract
A discrete Boltzmann model (DBM) is developed to investigate the hydrodynamic and thermodynamic non-equilibrium (TNE) effects in phase separation processes. The interparticle force drives changes and the gradient force, induced by gradients of macroscopic quantities, opposes them. In this paper, we investigate the interplay between them by providing detailed inspection of various non-equilibrium observables. Based on the TNE features, we define a TNE strength which roughly estimates the deviation amplitude from the thermodynamic equilibrium. The time evolution of the TNE intensity provides a convenient and efficient physical criterion to discriminate the stages of the spinodal decomposition and domain growth. Via the DBM simulation and this criterion, we quantitatively study the effects of latent heat and surface tension on phase separation. It is found that, the TNE strength attains its maximum at the end of the spinodal decomposition stage, and it decreases when the latent heat increases from zero. The surface tension effects are threefold, to prolong the duration of the spinodal decomposition stage, decrease the maximum TNE intensity, and accelerate the speed of the domain growth stage.
10 pages, 10 figures
References in corpus (4)
Cited by in corpus (45)
- Lattice Boltzmann methods for multiphase flow and phase-change heat transfer
- Improved thermal lattice Boltzmann model for simulation of liquid-vapor phase change
- Three-dimensional cascaded lattice Boltzmann method: improved implementation and consistent forcing scheme
- Discrete Boltzmann trans-scale modeling of high-speed compressible flows
- Discrete Boltzmann multi-scale modeling of non-equilibrium multiphase flows
- Nonequilibrium and morphological characterizations of Kelvin-Helmholtz instability in compressible flows
- Phase-field-based lattice Boltzmann modeling of large-density-ratio two-phase flows
- Collaboration and Competition Between Richtmyer-Meshkov instability and Rayleigh-Taylor instability
- A multi-component discrete Boltzmann model for nonequilibrium reactive flows
- A phase-field model for large-density-ratio two-phase flows based on discrete unified gas-kinetic scheme
- Discrete Boltzmann modeling of Rayleigh-Taylor instability in two-component compressible flows
- Discrete Boltzmann method for non-equilibrium flows: based on Shakhov model
- Mesoscopic simulations at the physics-chemistry-biology interface
- Advances in the kinetics of heat and mass transfer in near-continuous complex flows
- Morphological and non-equilibrium analysis of coupled Rayleigh-Taylor-Kelvin-Helmholtz instability
- Multiple-relaxation-time discrete Boltzmann modeling of multicomponent mixture with nonequilibrium effects
- Cascaded lattice Boltzmann method for incompressible thermal flows with heat sources and general thermal boundary conditions
- Entropy production in thermal phase separation: a kinetic-theory approach
- Improved three-dimensional thermal multiphase lattice Boltzmann model for liquid-vapor phase change
- Discrete Boltzmann modeling of high-speed compressible flows with various depths of non-equilibrium
- Discrete Boltzmann method with Maxwell-type boundary condition for slip flow
- Late-time description of immiscible Rayleigh-Taylor instability: A lattice Boltzmann study
- Novel non-equilibrium steady states in multiple emulsions
- Kinetic modeling of multiphase flow based on simplified Enskog equation
- Complex fields in heterogeneous materials under shock: modeling, simulation and analysis
- Nonequilibrium effects of reactive flow based on gas kinetic theory
- Dissipative hydrodynamics of relativistic shock waves in a Quark Gluon Plasma: comparing and benchmarking alternate numerical methods
- Two-fluid discrete Boltzmann model for compressible flows: based on Ellipsoidal Statistical Bhatnagar-Gross-Krook
- Particles on Demand for flows with strong discontinuities
- Thermodynamic non-equilibrium effects in bubble coalescence: A discrete Boltzmann study
- Three-dimensional discrete Boltzmann models for compressible flows in and out of equilibrium
- A lattice Boltzmann model for the coupled cross-diffusion-fluid system
- A simple and efficient kinetic model for wealth distribution with saving propensity effect: based on lattice gas automaton
- A One-Dimensional Discrete Boltzmann Model for Detonation and an Abnormal Detonation Phenomenon
- The study of uniaxial-biaxial phase transition of confined hard ellipsoids using density functional theory
- Thermodynamic nonequilibrium effects in three-dimensional high-speed compressible flows: Multiscale modeling and simulation via the discrete Boltzmann method
- Kinetic modeling of economic markets with heterogeneous saving propensities
- Comparative study of discrete Boltzmann model and Navier-Stokes
- Investigating the Effect of Relaxation Time on Richtmyer-Meshkov Instability under Reshock Impact: A Two-Component Discrete Boltzmann Method Study
- Contact Angle Measurement in Lattice Boltzmann Method
- Comparative Study on Several Criteria for Non-equilibrium Phase Separation
- Non-equilibrium diffusion characteristics of a particle system and the correspondence to a social system
- Discrete ellipsoidal statistical BGK model and Burnett equations
- Specific heat ratio effects of compressible Rayleigh-Taylor instability studied by discrete Boltzmann method
- Pseudopotential multiple-relaxation-time lattice Boltzmann simulation of vapor condensation on vertical subcooled walls