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Related Experiment Video

Updated: Mar 29, 2026

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

Hydrodynamic correlations in shear flow: Multiparticle-collision-dynamics simulation study.

Anoop Varghese¹, Chien-Cheng Huang¹, Roland G Winkler¹

¹Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, Jülich 52425, Germany.

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

|December 15, 2015

Summary

This summary is machine-generated.

This study explores nonequilibrium hydrodynamic correlations in multiparticle-collision-dynamics (MPC) fluids under shear flow. Results show anisotropic correlations and directional dependence, validating theoretical predictions with simulations.

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Published on: January 3, 2014

Area of Science:

Fluid dynamics
Non-equilibrium statistical mechanics
Computational physics

Background:

Understanding fluid behavior under shear is crucial in many physical systems.
Nonequilibrium hydrodynamic correlations govern transport properties.
Multiparticle Collision Dynamics (MPC) is a mesoscopic simulation method for fluids.

Purpose of the Study:

To investigate the nonequilibrium hydrodynamic correlations of MPC fluids in shear flow.
To analyze the shear-rate dependence and anisotropy of velocity correlations.
To compare analytical predictions with simulation results.

Main Methods:

Linearization of Navier-Stokes equations for MPC fluids around shear flow.
Evaluation of hydrodynamic modes via wave vector expansion.
Conducting MPC simulations to study velocity correlations.

Main Results:

Hydrodynamic correlations in shear flow are anisotropic, with distinct transverse modes.
Simulations reveal directional dependence in the frequency and attenuation of longitudinal velocity correlations.
Velocity autocorrelation functions for tagged particles in shear flow were determined.

Conclusions:

Hydrodynamic correlations in MPC fluids exhibit significant anisotropy under shear.
Simulation results closely match theoretical predictions, validating the analytical framework.
The study provides insights into the complex dynamics of fluids far from equilibrium.