Temperature and its control in molecular dynamics simulations

M Sri Harish, PK Patra - Molecular Simulation, 2021 - Taylor & Francis
The earliest molecular dynamics simulations relied on solving the Newtonian or equivalently
the Hamiltonian equations of motion for a system. While pedagogically very important as the …

On the equivalence of Eulerian smoothed particle hydrodynamics, total Lagrangian smoothed particle hydrodynamics and molecular dynamics simulations for solids

MRI Islam, KV Ganesh, PK Patra - Computer Methods in Applied Mechanics …, 2022 - Elsevier
Significant advances in nanoscale research have enabled the continuous miniaturization of
devices. With the reduction in the size of the devices, it is important to identify if the …

Multiscale modeling of impact through molecular dynamics and smooth particle hydrodynamics

KV Ganesh, PK Patra, KP Travis - Physica A: Statistical Mechanics and its …, 2022 - Elsevier
We study the problem of a projectile impacting on a target at different length scales
employing two widely used techniques—molecular dynamics (MD) simulations at atomistic …

Ergodicity of one-dimensional systems coupled to the logistic thermostat

D Tapias, A Bravetti, DP Sanders - arXiv preprint arXiv:1611.05090, 2016 - arxiv.org
We analyze the ergodicity of three one-dimensional Hamiltonian systems, with harmonic,
quartic and Mexican-hat potentials, coupled to the logistic thermostat. As criteria for …

Nonequilibrium systems: Hard disks and harmonic oscillators near and far from equilibrium

WG Hoover, CG Hoover, JC Sprott - Molecular Simulation, 2016 - Taylor & Francis
We relate progress in statistical mechanics, both at and far from equilibrium, to advances in
the theory of dynamical systems. We consider computer simulations of time-reversible …

Green's function nonequilibrium molecular dynamics method for solid surfaces and interfaces

S Kajita - Physical Review E, 2016 - APS
This study presents a comprehensive procedure to calculate the exact dynamic Green's
function of a harmonic semi-infinite solid and the time trajectories of the atoms, in the …

Dynamic principle for ensemble control tools

A Samoletov, B Vasiev - The Journal of Chemical Physics, 2017 - pubs.aip.org
Dynamical equations describing physical systems in contact with a thermal bath are
commonly extended by mathematical tools called “thermostats.” These tools are designed …

Nonequilibrium temperature measurement in a thermal conduction process

PK Patra, RC Batra - Physical Review E, 2017 - APS
We identify the temperature being measured by a thermometer in a nonequilibrium scenario
by studying heat conduction in a three-dimensional Lennard-Jones (LJ) system whose two …

Cumulant analysis of the statistical properties of a deterministically thermostated harmonic oscillator

AN Artemov - Journal of Statistical Physics, 2019 - Springer
Usual approach to investigate the statistical properties of deterministically thermostated
systems is to analyze the regime of the system motion. In this work the cumulant analysis is …

Zeroth Law investigation on the logarithmic thermostat

PK Patra, B Bhattacharya - Scientific reports, 2018 - nature.com
Abstract The Zeroth Law implies that the three systems, each separately in equilibrium and
having the same temperature, must remain so when brought in pairwise or simultaneous …