Large fluctuations in non-ideal coarse-grained systems
arXiv:1905.07611 · doi:10.1103/PhysRevLett.124.234501
Abstract
Using the recently introduced Molecular Dynamics Lattice Gas (MDLG) approach, we test fluctuations of coarse-grained quantities. We show that as soon as the system can no longer be considered an ideal gas fluctuations fail to diminish upon coarse-graining as is usually expected. These results suggest that current approaches to simulating fluctuating hydrodynamics may have to be augmented to achieve quantitative results for systems with a non-ideal equation of state. The MDLG method gives a guidance to the exact nature of the fluctuation in such systems.
arXiv comment5 pages 3 figures
References in corpus (12)
- Fluctuating lattice Boltzmann
- Statistical Mechanics of the Fluctuating Lattice Boltzmann Equation
- Dynamic correlations in stochastic rotation dynamics
- Fluctuation preserving coarse graining for biochemical systems
- Thermal fluctuations in the lattice Boltzmann method for non-ideal fluids
- Lattice Boltzmann - Langevin simulations of binary mixtures
- Integer Lattice Gases
- Fluctuating Multicomponent Lattice Boltzmann Model
- Lattice Gas with Molecular Dynamics Collision Operator
- A fluctuating lattice-Boltzmann method with improved Galilean invariance
- Integer Lattice Gas with Monte Carlo collision operator recovers the entropic lattice Boltzmann method with Poisson distributed fluctuations
- Validity of the Molecular-Dynamics-Lattice-Gas Global Equilibrium Distribution Function
Cited by in corpus (8)
- Discrete Boltzmann multi-scale modeling of non-equilibrium multiphase flows
- Force approach for the pseudopotential lattice Boltzmann method
- Staggered Scheme for the Compressible Fluctuating Hydrodynamics of Multispecies Fluid Mixtures
- Non-Gaussian distribution of displacements for Lennard-Jones particles in equilibrium
- Molecular dynamics lattice gas equilibrium distribution function for Lennard-Jones particles
- Regularized Fluctuating Lattice Boltzmann Model
- Momentum fluctuations in coarse grained systems
- Molecular dynamics perspectives on nonideal fluid models for the lattice Boltzmann method