Gas hydrate growth kinetics was studied at a pressure of 90 bars to investigate the effect of temperature, initial water content, stirring rate, and reactor size in stirred semi-batch autoclave reactors. The mixing energy during hydrate growth was estimated by logging the power consumed. The theoretical model by Garcia-Ochoa and Gomez for estimation of the mass transfer parameters in stirred ta...

In a sample of local active galactic nuclei (AGNs) studied at a spatial resolution on the order of 10 pc, we show that the interstellar medium traced by the molecular hydrogen ν=1-0 S(1) line at 2.1 μm forms a geometrically thick, clumpy disk. The kinematics of the molecular gas reveals general rotation, although an additional significant component of random bulk motion is required by the high ...

The analytical theory of one dimensional, dispersion free miscible displacement of oil by injection gas with nc component has shown that: the MMP is the lowest pressure at which any one of the initial oil, injection gas or crossover key tie lines becomes critical, which means that its length approaches to zero. In this paper, we propose a method for a solving multi component syst...

Toxic or flammable gas release accident will possible form dangerous vapor cloud, which is of significant concerns to industrial safety and social security. In the current stage, several models are available for simulating and predicting the dispersion of hazardous gases to the surrounding environment, but these models all require information about the release source, for example, the release r...

Problem Statement Gas distribution modelling with a mobile robot in uncontrolled environments is a challenging field of research. This is mainly due to the chaotic nature of the dispersed gas that is affected by the turbulent features of the wind. We propose a statistical method to build two-dimensional gas distribution maps that takes into consideration the influence of wind in the dispersion ...

Dispersion of spray droplets and the modulation of turbulence in the ambient gas by the dispersing droplets are two coupled phenomena that are closely linked to the evolution of global spray characteristics, such as the spreading rate of the spray and the spray cone angle. Direct numerical simulations (DNS) of turbulent gas flows laden with sub-Kolmogorov size particles, in the absence of gravi...

We measured the dispersion relation for acoustic longitudinal waves in liquid foams, over a broad frequency range (60-600 kHz). Strong dispersion was found, with two nondispersive behaviors, separated by a negative density regime. A new model, based on the coupled displacements of films, liquid channels, and gas in the foam, rationalizes all the experimental findings.

We have investigated the atomisation of a thick liquid film by high speed co-flowing gas jet. The study is focused on the mechanisms controlling the drop spatial distribution downstream injection. These results are needed for properly initializing two-fluid euler-euler [1] or lagrangian [2] simulations. Measurements of the drop characteristics (concentration, velocity, size),available downstrea...