A 3D full size numerical model of a ring-type coaxial nozzle was established to obtain particle space trajectory and convergence character. The realizable k-ε applied in the gas flow phase. powder coupled with by using Euler–Lagrange approach as discrete phase model. Different material sizes were selected calculate concentration distribution. simulated stream morphology matched well experimenta...

Introduction. The results of a standard study the explosibility aluminum air suspensions (AAS) can contribute to development AAS combustion physics. In particular, complex information about polydispersity and low explosion limit values in 1-m 3 chamber made it possible determine maximum particle size explosive fraction polydisperse sample d * m,t ≈ 40–50 µm (Poletaev, 2014). present work, relat...

estimate the proportion of fines generated during the blasting process. The proposed framework is based on the combination of two Rosin-Rammler based distribution functions to model the full range of fragments expected to be produced during this process. This particular approach, which has been successfully applied for a number of years by the Julius Kruttschnitt Mineral Research Centre (JKMRC)...

Biomass particle size impacts handling, storage, conversion, and dust control systems. Switchgrass (Panicum virgatum L.) particle size distributions created by a knife mill were determined for integral classifying screen sizes from 12.7 to 50.8 mm, operating speeds from 250 to 500 rpm, and mass input rates from 2 to 11 kg/min. Particle distributions were classified with standardized sieves for ...

In addition to topical delivery, nasal sprays offer an alternative drug administration route the systemic circulation, therefore avoiding need for painful, invasive delivery techniques. Studies on efficacy of date have been conflicting despite its potential. particular computational studies, e.g. Computational Fluid Dynamics (CFD), spray deposition require realistic initial conditions, which ar...

Rock fragmentation is one of the desired results of rock blasting. So, controlling and predicting it, has direct effects on operational costs of mining. There are different ways that could be used to predict the size distribution of fragmented rocks. Mathematical relations have been widely used in these predictions. From among three proposed mathematical relations, one was selected in this stud...

A shower cooling tower (SCT) operates without fill because of salt decomposition on the fill that leads to deterioration of conventional cooling tower performance. This study presents a two-dimensional mathematical model for energy and exergy analysis of multi-diameter droplets and air interaction along with the height of the forced draft SCT, to predict the exit condition of water droplet for ...

Size reduction is a necessary operation in mineral processing plants and provides the desired size for separation operations liberation of valuable minerals present ores. Estimations on energy consumption indicate that milling consumes more than 50 % total used mining operations. Despite fact ball an efficient operation, it intensive, its modeling great challenge. In experimental study, efforts...

The purpose of this study is to identify parameters influence on the particle deposition within fin and tube heat exchanger of air-conditioning systems by CFD analysis. First the basic sketch of periodic geometry drawn and meshing operation including boundary conditions was performed. Then the gas side properties and flow parameters were solved by ANSYS Fluent 14.5 software. Lagrangian equa...