96 citations · 355 across the 15 of their papers we have counts for
15 papers
Surface Coverage Dynamics for Reversible Dissociative Adsorption on Finite Linear Lattices
Enrique Mercado, Hyun Tae Jung, Changho Kim +3
Dissociative adsorption onto a surface introduces dynamic correlations between neighboring sites not found in non-dissociative absorption. We study surface coverage dynamics where…
Learning Stochastic Dynamics with Statistics-Informed Neural Network
Yuanran Zhu, Yu-Hang Tang, Changho Kim
We introduce a machine-learning framework named statistics-informed neural network (SINN) for learning stochastic dynamics from data. This new architecture was theoretically inspir…
Projection Method for the Fluctuating Hydrodynamics Equations
Marc Mancini, Maxime Theillard, Changho Kim
Computational fluctuating hydrodynamics aims at understanding the impact of thermal fluctuations on fluid motions at small scales through numerical exploration. These fluctuations…
Generalized second fluctuation-dissipation theorem in the nonequilibrium steady state: Theory and applications
Yuanran Zhu, Huan Lei, Changho Kim
In this paper, we derive a generalized second fluctuation-dissipation theorem (FDT) for stochastic dynamical systems in the steady state. The established theory is built upon the M…
Momentum fluctuations in coarse grained systems
M. Reza Parsa, Changho Kim, Alexander J. Wagner
At first glance the definition of mass and momentum appears to be uniquely defined. We show here, however, that this certainty can be misleading for many coarse grained systems. We…
Density-Dependent Finite System-Size Effects in Equilibrium Molecular Dynamics Estimation of Shear Viscosity: Hydrodynamic and Configurational Study
Kang-Sahn Kim, Changho Kim, George Em Karniadakis +2
We study the intrinsic nature of the finite system-size effect in estimating shear viscosity of dilute and dense fluids within the framework of the Green-Kubo approach. From extens…
Fluctuating hydrodynamics of electrolytes at electroneutral scales
Aleksandar Donev, Andrew J. Nonaka, Changho Kim +2
At mesoscopic scales electrolyte solutions are modeled by the fluctuating generalized Poisson-Nernst-Planck (PNP) equations [J.-P. Péraud et al., Phys. Rev. F, 1(7):074103, 2016].…
Nature of Intrinsic Uncertainties in Equilibrium Molecular Dynamics Estimation of Shear Viscosity for Simple and Complex Fluids
Kang-Sahn Kim, Myung Hoon Han, Changho Kim +3
We study two types of intrinsic uncertainties, statistical errors and system size effects, in estimating shear viscosity via equilibrium molecular dynamics simulations and compare…
Fluctuating Hydrodynamics of Reactive Liquid Mixtures
Changho Kim, Andy Nonaka, John B. Bell +2
Fluctuating hydrodynamics (FHD) provides a framework for modeling microscopic fluctuations in a manner consistent with statistical mechanics and nonequilibrium thermodynamics. This…
Molecular Hydrodynamics: Vortex Formation and Sound Wave Propagation
Kyeong Hwan Han, Changho Kim, Peter Talkner +2
In the present study, quantitative feasibility tests of the hydrodynamic description of a two-dimensional fluid at the molecular level are performed, both with respect to length an…
Efficient Reactive Brownian Dynamics
Aleksandar Donev, Chiao-Yu Yang, Changho Kim
We develop a Split Reactive Brownian Dynamics (SRBD) algorithm for particle simulations of reaction-diffusion systems based on the Doi or volume reactivity model, in which pairs of…
Nature of self-diffusion in two-dimensional fluids
Bongsik Choi, Kyeong Hwan Han, Changho Kim +3
Self-diffusion in a two-dimensional simple fluid is investigated by both analytical and numerical means. We investigate the anomalous aspects of self-diffusion in two-dimensional f…
Stochastic Simulation of Reaction-Diffusion Systems: A Fluctuating-Hydrodynamics Approach
Changho Kim, Andy Nonaka, John B. Bell +2
We develop numerical methods for reaction-diffusion systems based on the equations of fluctuating hydrodynamics (FHD). While the FHD formulation is formally described by stochastic…
Brownian motion from molecular dynamics
Hyun Kyung Shin, Changho Kim, Peter Talkner +1
Brownian motion of single particles with various masses M and diameters D is studied by molecular dynamics simulations. Besides the momentum auto-correlation function of the Browni…
Rate description of Fokker-Planck processes with time-periodic parameters
Changho Kim, Peter Talkner, Eok Kyun Lee +1
The large time dynamics of a periodically driven Fokker-Planck process possessing several metastable states is investigated. At weak noise transitions between the metastable states…