We study the dynamics of colloidal fluids in both unconfined geometries and when confined by a hard wall. Under minimal assumptions, we derive a dynamical density functional theory (DDFT) which includes hydrodynamic interactions (HI; bath-mediated forces). By using an efficient numerical scheme based on pseudospectral methods for integro-differential equations, we demonstrate its excellent agre...

We show that the semiclassical dynamics of an electronic droplet, confined in a plane in a quantizing inhomogeneous magnetic field in the regime where the electrostatic interaction is negligible, is similar to viscous (Saffman-Taylor) fingering on the interface between two fluids with different viscosities confined in a Hele-Shaw cell. Both phenomena are described by the same equations with sca...

Recent Monte Carlo simulation studies of a Lennard-Jones fluid confined to a mesoscopic slit pore have reported evidence of "critical depletion" in the pore local number density near the liquid-vapor critical point. In this Brief Report we demonstrate that the observed depletion effect is in fact a simulation artifact arising from small systematic errors associated with the use of long range co...

We present a detailed analysis of a hydrodynamic constitutive model recently applied to study the non-local viscosity of highly confined inhomogeneous fluids (Zhang et al 2004 J. Chem. Phys. 121 10778, Zhang et al 2005 J. Chem. Phys. 122 219901). This model makes the assumption that, for pore widths significantly greater than the width of the viscosity kernel, one can approximate the true inhom...

The gauge cell Monte Carlo method [Neimark and Vishnyakov, J. Chem. Phys. 122, 234108 (2005)] for calculations of chemical potential in dense and strongly inhomogeneous fluids is extended to multicomponent systems. The system of interest is simulated in a sample cell that is placed in chemical contact with several gauge cells of limited capacity, one gauge cell per component. Thus, each compone...

Symmetry breaking surface fields give rise to nontrivial and long-ranged order parameter profiles for critical systems such as fluids, alloys or magnets confined to wedges. We discuss the properties of the corresponding universal scaling functions of the order parameter profile and the two-point correlation function and determine the critical exponents η and η ⊥ for the so-called normal transit...

Properties of fluids confined in pore systems are needed for modeling fluid flow, fluid-rock interactions, and changes in reservoir porosity. The properties of CO2-rich fluids are particularly relevant to geothermal heat mining using carbon dioxide instead of water. While manometric, volumetric, and gravimetric techniques have been used successfully to investigate adsorption of low-density subc...

Grand canonical simulations, ~specified chemical potential!, are performed with a fixed number of particles by coupling variations in the system size to the instantaneous chemical potential determined by virtual test particle methods. This is a modified form of the pseudogrand canonical method of Mehta and Kofke @Mol. Phys. 86, 139 ~1995!#. For dense fluids the method has the advantage of allow...

Simple and complex fluids undergo significant changes in their structural and rheological behaviour as they are progressively confined between narrowing walls. The understanding of these new fluid properties is of fundamental interest in applications ranging from thin film lubrication in micromachines to catalysis. The X-Ray surface forces apparatus (XSFA) is capable of non-destructive imaging ...