Screening properties of four mesoscale smoothed charge models, with application to dissipative particle dynamics

Abstract

We extend our previous study [J. Chem. Phys. 138, 204907 (2013)] to quantify the screening properties of four mesoscale smoothed charge models used in dissipative particle dynamics. Using a combination of the hypernetted chain integral equation closure and the random phase approximation, we identify regions where the models exhibit a real-valued screening length, and the extent to which this agrees with the Debye length in the physical system. We find that the second moment of the smoothed charge distribution is a good predictor of this behaviour. We are thus able to recommend a consistent set of parameters for the models.

6 pages, 3 figures, 1 table, RevTeX4-1

References in corpus (3)

• Screening properties of Gaussian electrolyte models, with application to dissipative particle dynamics
• Ultrasoft primitive model of polyionic solutions: structure, aggregation, and dynamics
• Phase behaviour and the random phase approximation for ultrasoft restricted primitive models

Cited by in corpus (6)

• Perspective: Dissipative Particle Dynamics
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• Liquid-Vapor Transition and Critical Behavior of The Ultrasoft Restricted Primitive Model of Polyelectrolytes : a Monte Carlo Study
• On the equivalence of self-consistent equations for nonuniform liquids: a unified description of the various modifications
• Polarisable soft solvent models with applications in dissipative particle dynamics