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Custom flow in molecular dynamics
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DOI：10.1103/PhysRevResearch.3.013281.png)
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摘要
En 中文
Driving an inertial many-body system out of equilibrium generates complex dynamics due to memory effects and the intricate relationships between the external driving force, internal forces, and transport effects. Understanding the underlying physics is challenging and often requires carrying out case-by-case analysis. To systematically study the interplay between all types of forces that contribute to the dynamics, a method to generate prescribed flow patterns could be of great help. We develop a custom flow method to numerically construct the external force field required to obtain the desired time evolution of an inertial many-body system, as prescribed by its one-body current and density profiles. We validate the custom flow method in a Newtonian system of purely repulsive particles by creating a slow-motion dynamics of an out-of-equilibrium process and by prescribing the full time evolution between two distinct equilibrium states. The method can also be used with thermostat algorithms to control the temperature.
Keyword:
DENSITY-FUNCTIONAL THEORY
SHEAR VISCOSITY
NONEQUILIBRIUM
SIMULATION
TIME
MICROFLUIDICS
TEMPERATURE
CALCULATE
LIQUIDS
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4.2
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7.6K
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2.7W
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