We describe the thermodynamic state of a single-phase fluid confined to porous medium with Hill’s thermodynamics small systems, also known as nanothermodynamics. This way defining system thermodynamics, separate set control variables, may be useful for study transport in non-deformable media, where presently no consensus exists on pressure computations. For fluid, we observe that there are two ...

The prediction of properties in porous materials is of continuing interest in the fields of chemical and materials engineering. Application areas include, among others: (1) the use of supercritical fluids to modify porous materials, (2) physical adsorption of trace components from gaseous effluents, (3) gas storage using microporous materials, and (4) chemical separations using inorganic membra...

We show [J. Fluid Mech. 592, 447 (2007)] that swapping (reversing) trajectories in confined suspension flows prevent collisions between particles approaching each other in adjacent streamlines. Here we demonstrate that by inducing layering this hydrodynamic mechanism changes the microstructure of suspensions in a confined Couette flow. Layers occur either in the near-wall regions or span the wh...

We report molecular dynamics simulations of liquid alkanes, squalane and tetracosane, confined between moving walls to which butane chains are tethered, effectively screening the details of the wall. As in an experiment, heat is removed by thermostatting the tethered molecules. Results obtained at high strain rates, typical of practical applications, suggest little or no difference between the ...

The aim of our research is to demonstrate the role of attractive intermolecular potential energy on normal pressure tensor of confined molecular fluids inside nanoslit pores of two structureless purely repulsive parallel walls in xy plane at z = 0 and z = H, in equilibrium with a bulk homogeneous fluid at the same temperature and at a uniform density. To achieve this we have derived the perturb...

Multiple cranial nerves palsies following a posterior fossa exploration confined to an extradural compartment is a rare clinical presentation. This case report describes a young man who developed a unilateral abducens and bilateral facial nerve palsies following a posterior fossa exploration confined to an extradural compartment. There are different theories to explain this presentation, but th...

We have studied superfluid helium-3 (He-3) confined to submicron slab geometries inside nanofabricated, microfluidic chambers. Two separate techniques were used to study the He-3 inside the chambers; nuclear magnetic resonance (NMR) and the torsional oscillator (TO). The NMR studies have shown a significant modification to the superfluid He-3 phase diagram as a result of the confinement, wherea...

As a continuation of Part I, where the energy balance periodically excited confined flow was studied, in this second part numerical model is validated against experiments on vertically tank-fluid system decaying motion. In one two models, tank movement prescribed according to experimental measurements; coupled mass-spring-damper equation resembling one. Both problems were studied for different ...

A hard sphere system confined between two parallel hard plates is investigated theoretically. Using extensive Monte Carlo computer simulations, the phase diagram is calculated for the whole range of densities and plate separations ranging from one to two particle diameters. There occurs a strong first-order fluid freezing transition and both very weak and strong discontinuous phase transitions ...

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...