We present a non-equilibrium molecular dynamics simulation of 125 methane molecules using a variant of the isokinetic “sllod” algorithm. The shear viscosity, pressure and internal energy of methane in a dense, supercritical fluid state (temperature 285.7 K and mass density 0.288 g/cm3) are calculated and the viscosity compared with experiment, with excellent agreement: the predicted shear visco...

In this paper we address the problem of estimating and analyzing the motion in image sequences that involve fluid phenomena. In this context standard motion estimation techniques are not well adapted and more dedicated approaches have to be designed. In this prospect, we propose to estimate in a joint and cooperative way a dense motion field and a peculiar parametric representation of the flow....

We measure the entrainment coefficient of a turbulent plume containing dense particles. When particle buoyancy flux opposes that fluid, is increased by up to 40%. In contrast, when and fluid act in same direction, unaffected. The effect on difference between two configurations linked clustering within plume.

Dense fluids, defined to include both dense gases and liquids, have the reputation of being especially difficult to deal with theoretically. This reputation is not undeserved. Unlike dilute gases and crystalline solids, which can be thought of as deviants from well understood ideal states, the ideal gas and the ideal harmonic crystal, the dense fluid lies far from any recognizable landmark. Thi...

Hot dense helium is studied with first-principles computer simulations. By combining path integral Monte Carlo and density functional molecular dynamics, a large temperature and density interval ranging from 1000 to 1 000 000 K and 0.4 to 5.4 g cm becomes accessible to first-principles simulations and the changes in the structure of dense hot fluids can be investigated. The focus of this articl...

Hot dense helium is studied with first-principles computer simulations. By combining path integral Monte Carlo and density functional molecular dynamics, a large temperature and density interval ranging from 1000 to 1 000 000 K and 0.4 to 5.4 g cm becomes accessible to first-principles simulations and the changes in the structure of dense hot fluids can be investigated. The focus of this articl...

Computational fluid dynamics are applied to the study of three-dimensional fluid flow in a dense medium plasma reactor (DMPR) under different operating conditions. Reaction mechanisms and rates for the removal of methyl t-butyl ether (MTBE) in a DMPR are developed from experimental data to determine the plasma volume, the rate of interphase mass transfer and the photolysis rate of MTBE via UV e...

‎In this paper we take $mathcal A$ to be the category {bf Pos-S}‎ ‎of $S$-posets‎, ‎for a posemigroup $S$‎, ${mathcal M}_{pd}$ to‎ ‎be the class of partially ordered sequantially-dense‎ ‎monomorphisms and study the categorical properties‎, ‎such as‎ ‎limits and colimits‎, ‎of this class‎. ‎These properties are usually‎ ‎needed to study the homological notions‎, ‎such as injectivity‎, ‎of‎ ‎$S$-...

In this paper, we address the problem of fluid motion estimation in image sequences. For such motions, standard dense motion estimation methods, based on intensity conservation and spatial coherence of motion field, are not suitable. This is due to the highly deformable nature of fluid medium. For all applications where fluid motions are to be recovered from images, it is then important to have...