Nonequilibrium depletion interactions in active microrheology

Soft Matter ◽  
2017 ◽  
Vol 13 (48) ◽  
pp. 9093-9102 ◽  
Author(s):  
R. Wulfert ◽  
U. Seifert ◽  
T. Speck
Keyword(s):  
Computer Simulations ◽  
Colloidal Particle ◽  
Superposition Approximation ◽  
Non Equilibrium ◽  
Depletion Forces ◽  
Depletion Interactions

We calculate non-equilibrium depletion forces between a driven and a passive colloidal particle within a dynamical superposition approximation and in computer simulations.

Umbrella sampling in non-equilibrium computer simulations

2005 ◽  
Vol 169 (1-3) ◽  
pp. 64-68 ◽  
Author(s):  
Ronald Blaak ◽  
Hartmut Löwen
Keyword(s):  
Computer Simulations ◽  
Umbrella Sampling ◽  
Non Equilibrium

scholarly journals Quantitative analysis of non-equilibrium systems from short-time experimental data

2021 ◽  
Author(s):  
Sreekanth K Manikandan ◽  
Subhrokoli Ghosh ◽  
Avijit Kundu ◽  
Biswajit Das ◽  
Vipin Agrawal ◽  
...  
Keyword(s):  
Experimental Data ◽  
Steady State ◽  
Quantitative Analysis ◽  
Large Class ◽  
Colloidal Particle ◽  
Particle System ◽  
Thermodynamic Force ◽  
Trajectory Data ◽  
Short Time ◽  
Non Equilibrium

Abstract We provide a minimal strategy for the quantitative analysis of a large class of non-equilibrium systems in a steady state using the short-time Thermodynamic Uncertainty Relation (TUR). From short-time trajectory data obtained from experiments, we demonstrate how we can simultaneously infer quantitatively, both the thermodynamic force field acting on the system, as well as the exact rate of entropy production. We benchmark this scheme first for an experimental study of a colloidal particle system where exact analytical results are known, before applying it to the case of a colloidal particle in a hydrodynamical flow field, where neither analytical nor numerical results are available. Our scheme hence provides a means, potentially exact for a large class of systems, to get a quantitative estimate of the entropy produced in maintaining a non-equilibrium system in a steady state, directly from experimental data.

A High Resolution Study of G.P. Zones in Aluminum - 4.2 at % Silver

1982 ◽  
Vol 40 ◽  
pp. 722-723 ◽  
Author(s):  
R. Gronsky
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Computer Simulations ◽  
Structural Characteristics ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Resolution Study

The phenomenon of clustering in Al-Ag alloys has been extensively studied since the early work of Guinierl, wherein the pre-precipitation state was characterized as an assembly of spherical, ordered, silver-rich G.P. zones. Subsequent x-ray and TEM investigations yielded results in general agreement with this model. However, serious discrepancies were later revealed by the detailed x-ray diffraction - based computer simulations of Gragg and Cohen, i.e., the silver-rich clusters were instead octahedral in shape and fully disordered, atleast below 170°C. The object of the present investigation is to examine directly the structural characteristics of G.P. zones in Al-Ag by high resolution transmission electron microscopy.

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