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Updated: Apr 5, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Generalized hydrodynamics model for strongly coupled plasmas.

A Diaw¹, M S Murillo¹

¹New Mexico Consortium, Los Alamos, New Mexico 87544, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|August 15, 2015

Summary

This summary is machine-generated.

This study introduces a new generalized hydrodynamic model for plasmas, incorporating viscoelastic effects and Coulomb coupling. The model accurately describes ion-acoustic waves across various plasma types, validated by molecular dynamics simulations.

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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Published on: August 1, 2017

Area of Science:

Plasma Physics
Condensed Matter Physics
Statistical Mechanics

Background:

The Bogoliubov-Born-Green-Kirkwood-Yvon hierarchy provides exact equations for many-body systems.
Accurate modeling of plasma dynamics requires incorporating Coulomb coupling and viscoelastic effects.
Existing models often lack self-consistency in equation-of-state properties.

Purpose of the Study:

To derive generalized hydrodynamic equations from the BBGKY hierarchy.
To develop a self-consistent model including density-functional theory closure and collisional relaxation.
To accurately describe ion-acoustic waves in various plasma systems.

Main Methods:

Derivation of density, momentum, and stress tensor-moment equations from the BBGKY hierarchy.
Closure of moment equations using density-functional theory and collisional relaxation.
Comparison with existing models (generalized hydrodynamics, STLS, QLA) and molecular dynamics simulations.

Main Results:

A generalized hydrodynamic model incorporating Coulomb coupling, viscous damping, and viscoelastic response.
Demonstration of the importance of viscoelasticity for ion-acoustic wave description.
Excellent agreement with molecular dynamics simulations for Yukawa plasmas.

Conclusions:

The developed generalized hydrodynamic model provides a self-consistent description of plasma properties.
The model accurately captures high-frequency elastic generalization and viscous wave damping.
The model is applicable to ultracold, dusty, and dense plasmas, with potential for extension to mixtures and quantum systems.