One of the ingredients in Granular Dynamics (or DEM) is a description of interparticle forces. In this paper the effect of surface roughness on Hamaker and liquid bridge interactions is investigated. Three different models are used (excluded volume, stochastic roughness and explicit asperities). In general, the latter two give similar results. Roughness decreases interactions up to several orde...

In many aspects, colloidal particles suspended in a liquid behave like large idealized atoms that exhibit liquid, glass, and crystal phases similar to those observed in atomic systems. Phase transitions in colloidal systems have been intensively studied over the last decade not only because of the theoretical interest for addressing fundamental questions about the nature of liquids, crystals, a...

Using numerical simulations, the rheological response of an athermal assembly of soft particles with tunable attractive interactions is studied in the vicinity of jamming. At small attractions, a fragile solid develops and a finite yield stress is measured. Moreover, the measured flow curves have unstable regimes, which lead to persistent shear banding. These features are rationalized by establ...

The classification of large halos formed by two identical particles and a core is systematically addressed according to interparticle distances. The root-mean-square distances between the constituents are described by universal scaling functions obtained from a renormalized zero-range model. Applications for halo nuclei, 11 Li and 14 Be, and for atomic 4 He 3 are briefly discussed. The generali...

We establish a set of nonequilibrium quantum phase transitions in the Lipkin-Meshkov-Glick model under monochromatic modulation of the interparticle interaction. We show that the external driving induces a rich phase diagram that characterizes the multistability in the system. Interestingly, the number of stable configurations can be tuned by increasing the amplitude of the driving field. Furth...

The three-dimensional Gaussian core model (GCM) for soft-matter systems has repulsive interparticle interaction potential ? ( r ) = ? exp [ ? / ? 2 ] , with the distance between a pair of atoms, and positive constants setting energy length scales, respectively. is mostly soft in character, without typical hard present fluid models. We work out thermodynamic Ricci curvature scalar R GCM, particu...

Abstract An interparticle interaction potential has been recently proposed in studies of condensate-like systems described by logarithmically nonlinear equations, such as the superfluid helium-4 and Korteweg-type melts. It shape a Gaussian multiplied linear function can switch between attraction repulsion regimes distance varies. We consider classical fluid model with discretized version this M...

Cementation factor is a critical parameter, which affects water saturation calculation. In carbonate rocks, due to the sensitivity of this parameter to pore type, water saturation estimation has associated with high inaccuracy. Hence developing a reliable mathematical strategy to determine these properties accurately is of crucial importance. To this end, genetic algorithm pattern search is emp...

We present experimental data on the light scattering properties of linear chains of gold nanoparticles with up to six nanoparticles and an interparticle spacing of 1 nm. A red shift of the surface plasmon resonance with increasing chain length is observed. An exponential model applied to the experimental data allows determination of an asymptotic maximum resonance at a chain length of 10-12 par...