2019/05/23 by Patrick Charbonneau, Joyjit Kundu
Engineering · Materials Science · Physics and Astronomy · #Attraction #Dynamical system (definition) #Dynamical systems theory #Fluid Dynamics and Heat Transfer #Hard spheres #Material Dynamics and Properties #Parameter space #Pickering emulsions and particle stabilization #SPHERES #Space (punctuation) #State (computer science) #cond-mat.soft #cond-mat.stat-mech
paper · pdf · doi:10.1007/s10035-020-0998-z
published as Granular Matter 22, 55 (2020) · 5
arxiv created 2019/05/23 · openalex created_date 2019/05/29 · openalex publication_date 2020/05/11 · arxiv updated 2020/08/13 · openalex updated_date 2026/08/05
Systems of dense spheres interacting through very short-ranged attraction are known from theory, simulations and colloidal experiments to exhibit dynamical reentrance. The liquid state can thus be fluidized to higher densities than otherwise possible with interactions that are purely repulsive or long-ranged attractive. A recent mean-field, infinite-dimensional calculation predicts that the dynamical arrest of the fluid can be further delayed by adding a longer-ranged repulsive contribution to the short-ranged attraction. We examine this proposal by performing extensive numerical simulations in a three-dimensional system. We first find the short-ranged attraction parameters necessary to achieve the densest liquid state, and then explore the parameters space for an additional longer-ranged repulsion that could enhance the effect. In the family of systems studied, no significant (within numerical accuracy) delay of the dynamical arrest is observed beyond what is already achieved by the short-ranged attraction. Possible explanations are discussed.