Showing papers in "Powder Technology in 2016"

TL;DR: A review of the recent efforts in developing discrete element method (DEM) approaches to model non-spherical particulate systems (NSPS) and strategies of coupling such a nonspherical DEM model with computational fluid dynamics (CFD) for particle-fluid flows is presented in this paper.

TL;DR: In this article, the authors developed a particle-based numerical tool and applied it to investigate the characteristics of the powder layer deposited onto the part using a roller as the coating system.

TL;DR: In this paper, the zeolite-type substrates were obtained by using the fly ashes modified through hydrothermal processes using a low concentration of NaOH, and were further used for heavy metals removal from synthetic solutions with mono-, bi-, and five-cations.

TL;DR: In this article, a calibration process is proposed to calibrate the parameter values for crushed rock particles up to 40 mm in size using a large shear box with a diameter of 590 mm.

TL;DR: In this paper, a general model for the prediction of the drag coefficient of non-spherical solid particles of regular and irregular shapes falling in gas or liquid valid for sub-critical particle Reynolds numbers was presented.

TL;DR: In this paper, the authors summarized some common methods for determining the wettability of powders, especially the contact angle that a liquid would form on powders and compared the advantages and disadvantages of these techniques.

TL;DR: In this paper, a novel framework is proposed to measure 3D shape parameters of form, roundness, and compactness using X-ray micro-computed tomography (μCT) images.

TL;DR: In this article, the authors evaluated the effect of γ (gamma and α (alpha) Fe2O3/Kerosene nanofluids for a closed loop pulsating heat pipe under the magnetic field.

TL;DR: In this article, a modified Hummers' method was used to prep graphene oxide with the negative charge and hexadecyl trimethyl ammonium bromide (CTAB) was applied to obtain the surface positive charge.

TL;DR: In this paper, a comprehensive approach in modeling and computational study to determine erosion in elbows due to sand particles entrained in air is presented, which can be used to predict the bend lifetime for particular operating conditions.

TL;DR: In this article, the performance of heat transfer and entropy generation on laminar natural convection of non-Newtonian nanofluids in a porous square cavity have been analyzed by Finite Difference Lattice Boltzmann Method (FDLBM).

TL;DR: In this article, a two-way coupled Eulerian-Lagrangian approach is employed to solve the liquid-solid flow in the pipe bend and five different erosion models and two particle-wall rebound models are combined to predict the erosion rate.

TL;DR: In this paper, the physical properties of spray and freeze-dried sumac extract powders along with the effects of the addition of different amounts of maltodextrin (MD, 10−12 DE) were determined.

TL;DR: The GPU-based DEM developed in this work makes the simulation of real industrial processes possible and can handle large granular systems with more than 10 million particles.

TL;DR: A method for the identification of DEM simulation parameters that uses artificial neural networks to link macroscopic experimental results to microscopic numerical parameters and which can be used generically to identify DEM material parameters.

TL;DR: In this paper, the authors derived and validated new correlations for the drag, lift and pitching torque coefficients for non-spherical particles and a large range of Reynolds numbers Rep and aspect ratios w.

TL;DR: In this paper, a laboratory scale fluidized bed was examined experimentally and numerically involving differently sized wooden Geldart-D particle shapes, and simulations were performed with a coupled DEM-CFD approach, which involves a drag force model that realizes for the particle shape and orientation.

TL;DR: In this article, the authors synthesize Al-4 vol.% Al2O3 nano-composite powders using HEBM with two different types of milling and pause combinations.

TL;DR: In this article, the carbon black structure in lithium-ion battery electrodes can precisely be governed by careful parameter variations in an upstream dry mixing process, and significant changes in important electrode properties like mechanical, structural and electrical characteristics are achieved and can be described as functions of the process parameters, such as mixing time and mixing intensity.

TL;DR: In this article, a nanoparticle formation mechanism caused by the coagulation of the primary particles generated in the early stages of the electrical explosion of the wires has been proposed, and the as-prepared samples were characterized by transmission electron microscopy, energy dispersive X-ray microanalysis, Xray diffraction and Brunauer-Emmett-Teller specific surface area measurements.

TL;DR: In this paper, the scaling of model parameters that is necessary to produce scale independent predictions for cohesionless and cohesive solid under quasi-static simulation of confined compression and unconfined compression to failure in uniaxial test was investigated.

TL;DR: In this paper, a model silo with a non-steady, inhomogeneous internal flow pattern is used as a test case, where three distinct flow regimes are present, i.e. : (i) a stagnant zone, (ii) a high shear localisation zone and (iii) a core zone with fast flow.

TL;DR: In this paper, a spray-drying process was used to encapsulate vitamins using different biopolymers, such as modified chitosan, modified alginate and sodium alginates.

TL;DR: In this paper, hot gas filters composed of polyimide nanofiber membrane sandwiched between carbon woven fabrics are fabricated to capture fine particles of PM 2.5 level, and the results show that the maximum filtration efficiency reaches 99.99% and the maximum pressure drop is only 251.86

TL;DR: In this article, a new erosion model referred to as SIEM (shear impact energy model) was used to investigate elbow erosion under different working conditions using numerical simulations, and the simulation results showed that the coupling methods have little influence on the erosion prediction when the particle concentration is low, whereas erosion in the elbow is significantly sensitive to particle concentration.

TL;DR: In this paper, a novel method was developed to produce spherical Ti-6Al-4V powder for advanced near-net-shape manufacturing processes including additive manufacturing and powder injection molding.

TL;DR: Moisture adsorption isotherms and storage study of spray-dried tamarind pulp powder were evaluated in this paper, where experimental data obtained was fitted to several mathematical models viz. two-parameter (BET, Oswin, Smith, Caurie, and Iglesias and Chirife), and three-parameters (GAB) relationships.

TL;DR: In this paper, the authors used the Eulerian method to study the CO2 gasification of biomass in a fluidized bed gasifier and found that the CO 2 percentage in the gasifying mixture with air, the CO-to-biomass ratio, the moisture content of woodchips, and the woodchip size had great influence on the gasification performance.

TL;DR: In this article, the authors summarize and analyze CFD simulations for these three-phase fluidization systems from two aspects: the fundamentals and their applications, which are of paramount importance to the formulation of strategies for scale-up, design and control of three phase FBRs.

TL;DR: In this article, a fundamental investigation was carried out on coal-coal, kaolinite-kaolinite, and coal-kolinite interactions using the atomic force microscopy colloidal probe technique at different pH and calcium concentrations to explore the effect of kolinite on fine coal flotation.