Showing papers in "Powder Technology in 2013"

TL;DR: In this paper, the effects of the squeeze number, the nanofluid volume fraction and Eckert number and δ on Nusselt number were investigated, and the results showed that Nussellt number has a direct relationship with nanoparticle volume fraction, δ, the squeeze and EKN when two plates are separated but it has reverse relationship with the squeeze when two plate are squeezed.

TL;DR: In this paper, a coupled Computational Fluid Dynamics and Discrete Element Method (CFD-DEM) approach is presented to simulate the behavior of fluid-particle interaction for applications relevant to mining and geotechnical engineering.

TL;DR: In this paper, the authors investigated the unsteady flow of a nanofluid squeezing between two parallel plates using the Adomian Decomposition Method (ADM) to solve this problem.

TL;DR: A nanostructured Fe-Al-Mn trimetal oxide adsorbent for phosphate removal with a Fe:Al:Mn molar ratio of 3:3:1 was prepared using simultaneous oxidation and coprecipitation method as discussed by the authors.

TL;DR: In this article, the authors provide a general overview of the application of computational techniques to the science of comminution, including simulation of fracture, breakage, crushing, milling and equipment wear.

TL;DR: In this paper, Least Square and Galerkin methods are used to solve the problem of laminar nanofluid flow in a semi-porous channel in the presence of transverse magnetic field.

TL;DR: In this paper, metal oxide nanoparticles such as ZnO and SnO 2 with specific surface areas of 15.75 and 24.48 cm 2 /g were successfully synthesized by precipitation method and then employed as adsorbents for removal of Malachite Green Oxalate (MGO) and hexavalent Chromium (Cr) from aqueous solution.

TL;DR: In this article, the applicability of different industrially scalable techniques in the preparation of solid dispersions using a novel polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer (Soluplus®) for preparing immediate-release formulations of a poorly water-soluble BCS class II drug was investigated.

TL;DR: In this paper, a template-free reflux condensation approach was used to synthesize single phase MgO nanoparticles exhibiting cubic crystal structure for the degradation of methyl orange and methylene blue dyes under UV light irradiation.

TL;DR: In this article, the use of tests conducted with single pellets for estimating material and contact parameters that are required in DEM simulations using the no-slip Hertz-Mindlin model is analyzed.

TL;DR: In this paper, the effect of formulation parameters on granule properties and growth behavior using a 16mm twin screw granulator was investigated using a model placebo formulation composed of lactose, microcrystalline cellulose, hydroxypropylmethyl cellulose and croscarmellose sodium.

TL;DR: In this paper, the Ergun equation was used to predict the pressure drop over a packed bed of irregular particles such as crushed rock with any degree of accuracy, an empirical equation must be obtained from a sample of the particles for a given packing arrangement.

TL;DR: In this paper, the authors examined some fundamental principles of particle formation during spray drying and established a rational methodology to control the particle properties such as size and morphology, which allowed the production of particles with different sizes and morphologies in a controlled manner.

TL;DR: In this article, the authors highlight the effect of different pretreatment methods on the flotation of low-rank/oxidized coals and highlight the impact of different pre-treatment methods on coal flotation.

TL;DR: In this paper, the authors reported the biosynthesis of selenium nanoparticles with nonpathogenic, ecofriendly, easily available bacterium Zooglea ramigera, which was formed extracellular, stable, uniform, nanospherical structure of monoclinic crystalline seminium.

TL;DR: In this article, a photocatalyst was used to degrade a p-aminophenol aqueous solution using XRD, FT-IR, BET and SEM methods, and the degradation and mineralization extents were performed by UV-vis spectrophotometry, COD and HPLC.

TL;DR: In this article, the applicability of computational particle fluid dynamics (CPFD) numerical schemes for simulating flows in circulating fluidized bed (CFB) risers was investigated, and the results indicated that the drag force in the CPFD scheme is still overestimated, although the cumulative method used to compute drag force is more accurate than the proportional method in the two-fluid model.

TL;DR: In this article, coal dust physical properties as well as its wetting behaviors were analyzed systemically and the influences of different surfactants on coal dust's wetting behavior were also investigated and compared with deionized water.

TL;DR: In this paper, a two-dimensional numerical study has been performed to investigate natural convection in a square cavity with curve boundaries filled with Cu-water nanofluid, and the Lattice Boltzmann Method (LBM) is used to simulate this problem.

TL;DR: In this paper, a new approach of attaining the optimum grinding condition of a planetary ball mill and simple method for purifying multi-walled carbon nanotubes (MWCNTs) to investigate the dispersion characteristics of MWCNTs was presented.

TL;DR: In this article, a method was developed to synthesize pure, stable, stoichiometric nano crystalline hydroxyapatite (HA: Ca 10 (PO 4 ) 6 (OH) 2 ) at room temperature via alcohol based sol-gel route using Ca(NO 3 ) 2.4H 2 O and NH 4 H 2 PO 4 as calcium and phosphorous precursors, respectively.

TL;DR: In this paper, the effect of particle size on lignite reverse flotation with a focus on reverse-flotation kinetics in the presence of sodium chloride has been investigated and the results show that all kinetic models except the classical first-order flotation kinetic model gave excellent fits to the experimental data under various grinding fines contents and various size fractions.

TL;DR: In this article, the authors used finite element analysis (FEA) to calculate the peak principal tensile strength of capsule-shaped and oval-shaped tablets, and showed that for a convex-faced elongated circular tablet, the problem can be reduced to a 2.3-approximation problem, where σ t = 2 3 10 P π D 2 2 2.

TL;DR: In this article, rotary evaporation and spray-drying solvers were used to produce solid dispersions of loratadine, a class II drug in the Biopharmaceutical Classification System, with the hydrophilic carrier polyvinylpyrrolidone K-30.

TL;DR: In this paper, the effects of adding fly ash microsphere (FAM) to the filling of voids between cement grains were studied. And the results showed that the addition of up to 40% FAM would significantly increase the packing density of the cementitious materials.

TL;DR: In this article, a stable mixture of propylene glycol (PG) and EG in water (WPG, WEG) was investigated, with and without the presence of surfactants.

TL;DR: In this article, the wedging effect caused by fine particles trapped at narrow gaps between coarse particles, which has not been considered in the existing packing models, is incorporated into a new 3-parameter packing model, which provides a better insight into the packing structure of solid particles.

TL;DR: In this paper, a super-fine steel slag with a specific surface area of 786m2/kg was prepared by mechanical grinding and its cementitious properties were investigated by comparing the results obtained from it with those obtained from ordinary steel slags, fly ash, and cement.

TL;DR: In this article, the effect of a magnetic field on natural convection flow in a nanofluid-filled cavity with sinusoidal temperature distribution on one side wall has been analyzed with a new attitude to Lattice Boltzmann method (LBM).

TL;DR: In this paper, an experimental and numerical investigation with the discrete element method (DEM) on the discharge of spheres and polyhedral dices from a hopper is conducted, which demonstrates the adequacy of DEM as well as polyhedral and smoothed polyhedral approximation schemes to simulate non-spherical particle geometries.