0000000000559865

AUTHOR

Stefan Medina

showing 2 related works from this author

An efficient dissipative particle dynamics-based algorithm for simulating electrolyte solutions

2015

We propose an efficient simulation algorithm based on the dissipative particle dynamics (DPD) method for studying electrohydrodynamic phenomena in electrolyte fluids. The fluid flow is mimicked with DPD particles while the evolution of the concentration of the ionic species is described using Brownian pseudo particles. The method is designed especially for systems with high salt concentrations, as explicit treatment of the salt ions becomes computationally expensive. For illustration, we apply the method to electro-osmotic flow over patterned, superhydrophobic surfaces. The results are in good agreement with recent theoretical predictions.

Models MolecularOsmosisMaterials scienceSurface PropertiesGeneral Physics and AstronomyIonic bondingFOS: Physical sciencesElectrolyteCondensed Matter - Soft Condensed MatterIonPhysics::Fluid DynamicsElectrolytesFluid dynamicsPhysical and Theoretical ChemistryBrownian motionDissipative particle dynamicsFluid Dynamics (physics.flu-dyn)MechanicsPhysics - Fluid DynamicsComputational Physics (physics.comp-ph)SolutionsCondensed Matter::Soft Condensed MatterFlow (mathematics)HydrodynamicsSoft Condensed Matter (cond-mat.soft)SaltsElectrohydrodynamicsPhysics - Computational PhysicsHydrophobic and Hydrophilic InteractionsAlgorithms
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Confined binary two-dimensional colloidal crystals: Monte Carlo simulation of crack formation.

2010

Binary mixtures (A, B) of colloidal particles of different sizes in two dimensions may form crystals with square lattice structure (the A-particles occupying the white sites and the B-particles the black sites of a checkerboard). Confining such a system by two parallel 'walls' a distance D apart, long-range order in the direction parallel to the walls is stabilized by 'corrugated walls' that are commensurate with the lattice structure but destabilized by structureless 'hard walls', even if there is no misfit between the strip width D and the crystal lattice spacing. The crossover to quasi-one-dimensional behavior is studied by Monte Carlo simulations, analyzing Lindemann parameters and disp…

Stress (mechanics)CrystalCorrelation function (statistical mechanics)Materials scienceCondensed matter physicsMonte Carlo methodParticleGeneral Materials ScienceColloidal crystalCondensed Matter PhysicsCritical valueSquare latticeJournal of physics. Condensed matter : an Institute of Physics journal
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