Author Index
Publication date: December 2019Source: Particuology, Volume 47Author(s): (Source: Particuology)
Source: Particuology - December 27, 2019 Category: Science Source Type: research
Annual Index
Publication date: December 2019Source: Particuology, Volume 47Author(s): (Source: Particuology)
Source: Particuology - December 27, 2019 Category: Science Source Type: research
Reviewer Acknowledgement
Publication date: December 2019Source: Particuology, Volume 47Author(s): (Source: Particuology)
Source: Particuology - December 27, 2019 Category: Science Source Type: research
EMMS drag model for simulating a gas–solid fluidized bed of geldart B particles: Effect of bed model parameters and polydisperity
Publication date: Available online 26 December 2019Source: ParticuologyAuthor(s): Krishnadash S. Kshetrimayum, Seongho Park, Chonghun Han, Chul-Jin LeeAbstractThe energy minimization multi-scale (EMMS) is a heterogeneous drag model widely used to simulate gas–solid fluidized beds. In this work, we conducted computational fluid dynamics simulations of a gas–solid fluidized bed for Geldart B particles to compare the EMMS with the homogeneous Gidaspow drag model. The results from both the homogeneous and heterogeneous drag models were compared with literature experimental data on pressure drop and bed expansion. There was...
Source: Particuology - December 26, 2019 Category: Science Source Type: research
Investigation of gas‒solids flow hydrodynamics in a cold model of a dual fluidised bed gasifier using electrical capacitance tomography sensors
Publication date: Available online 25 December 2019Source: ParticuologyAuthor(s): Zhan Luo, Yonglei Lin, Qiuya Tu, Wuqiang Yang, Haigang WangAbstractThe flow characteristics of a dual fluidised bed gasifier (DFBG) are more complex than those of a single fluidised bed gasifier. For stable operation and appropriate control, a cold DFBG test facility with both an upper and a lower U-valve was built, and electrical capacitance tomography (ECT) sensors were installed with pressure transducers to investigate the effects of operating conditions on gas‒solids flow hydrodynamics. The operating parameters included gas velocities i...
Source: Particuology - December 26, 2019 Category: Science Source Type: research
Synergetic effect of secondary nucleation and growth on the lithium carbonate particle size in the gas–liquid reactive crystallization of LiCl–NH3·H2O–CO2
In this study, the gas‒liquid reactive crystallization of LiCl–NH3·H2O–CO2 was adopted to produce Li2CO3. The weakly alkaline nature of NH3·H2O in the absence of any recarbonation process resulted in a unimodal and easily controllable particle size distribution (PSD) of the obtained Li2CO3. The reaction temperature significantly influenced both the Li2CO3 particle size and PSD. By increasing the temperature from 25 to 60 °C, the volume weighted mean particle size increased from 50.5 to 100.5 μm, respectively. The Li2CO3 secondary nucleation rate and growth rate were obtained by focused beam reflectance measur...
Source: Particuology - December 24, 2019 Category: Science Source Type: research
Modified shear cell for characterization of the rheological behavior of particulate networks under compression
Publication date: Available online 20 December 2019Source: ParticuologyAuthor(s): Simon Hammerich, Anthony D. Stickland, Benjamin Radel, Marco Gleiss, Hermann NirschlAbstractKnowledge of the rheological behavior of saturated particulate networks is crucial for every process in which a particulate network is built-up, dewatered, or transported, as in a decanter centrifuge. However, difficulties arise as to how to characterize the material properties. Thus far, no standardized method or measurement device has prevailed. In this work, the requirements for a useful device are discussed, followed by the design of a modified she...
Source: Particuology - December 21, 2019 Category: Science Source Type: research
Preliminary study on the influence of in situ filter size in CFD-DEM transfer kernel
Publication date: Available online 20 December 2019Source: ParticuologyAuthor(s): William D. Fullmer, Jordan MusserAbstractAn unknown in coupled Eulerian‒Lagrangian models for particle flow, such as CFD-DEM, which has received fairly little attention in the literature to date is the size of the filter width in the transfer kernel. This work provides a preliminary glimpse at how this parameter can influence the solution in cold-flow, unbounded fluidization. Comparison to previously published direct numerical simulation data is used to suggest an appropriate range for this parameter.Graphical abstract (Source: Particuology)
Source: Particuology - December 20, 2019 Category: Science Source Type: research
Hydrodynamics in commercial-scale internally circulating fluidized beds with different central downcomer outlets
In this study, the hydrodynamics in commercial-scale internally circulating fluidized beds (ICFBs) with central downcomers having different outlet structures was investigated using computational fluid dynamics simulations with an energy minimization multi-scale drag model. The predicted results closely agreed with experimental data. Results showed that in an ICFB with a downcomer outlet directly open to the bed (model A), nearly 12.7% to 5.4% of the gas in the draft tube bypasses into the downcomer. In the ICFB models B and C with a conic baffle below the downcomer, the gas bypass is significantly weakened or even eliminat...
Source: Particuology - December 18, 2019 Category: Science Source Type: research
Elutriation, attrition and segregation in a conical spouted bed with a fountain confiner
This study examined elutriation, attrition, and segregation in a conical spouted bed with a fountain confiner and incorporating an open sided draft tube. Fine silica sand with a wide particle size distribution was employed as a model material, operating in both the batch and continuous modes. The use of a fountain confiner is crucial when operating with fine particles, because otherwise the bed rapidly exhibits significant entrainment. The extent of attrition was quantified using a tracing technique based on differently-coloured sand fractions as well as monitoring size distributions by sieving. Particle breakage was found...
Source: Particuology - December 17, 2019 Category: Science Source Type: research
Numerical and experimental study of radial segregation of bi-disperse particles in a quasi-two-dimensional horizontal rotating drum
Publication date: Available online 12 December 2019Source: ParticuologyAuthor(s): Zhichao Hou, Yongzhi ZhaoAbstractRadial segregation easily occurs in a horizontal rotating drum partially filled with particles of different properties under various operational conditions. DEM (discrete element method) simulations and experiments were combined together to investigate the segregation of bi-disperse particles of the same density but unequal sizes in a quasi-two-dimensional horizontal rotating drum. A linear spring-dashpot model was adopted in simulations. An easy and effective image analysis was conducted for the segregation/m...
Source: Particuology - December 13, 2019 Category: Science Source Type: research
Editorial Board
Publication date: December 2019Source: Particuology, Volume 47Author(s): (Source: Particuology)
Source: Particuology - December 8, 2019 Category: Science Source Type: research
Hydrodynamic behavior of an airlift reactor with net draft tube with different configurations: Numerical evaluation using CFD technique
Publication date: Available online 4 December 2019Source: ParticuologyAuthor(s): Reza Salehpour, Elham Jalilnejad, Mehran Nalband, Kamran GhasemzadehAbstractIn terms of gas holdup, liquid velocity, and volumetric mass transfer coefficient for oxygen (KLa), the hydrodynamic behavior of four configurations of an airlift reactor (ALR) with a net draft tube (NDT) of different net mesh sizes (ALR-NDT-3, 6, 12, and ALR) have been numerically simulated for a range of inlet air flow rates. The effect of various levels of ratio of height (H) to inner tube diameter (D) of the net draft tube (H/D: 9.3, 10.7, 17.5, and 20) and ratio o...
Source: Particuology - December 5, 2019 Category: Science Source Type: research
Seasonal variation in particle contribution and aerosol types in Shanghai based on satellite data from MODIS and CALIOP
Publication date: Available online 2 December 2019Source: ParticuologyAuthor(s): Qiong Liu, Xin Liu, Tongqiang Liu, Yanming Kang, Yonghang Chen, Jiming Li, Hua ZhangAbstractAlthough the concentration of atmospheric particulate matter in Shanghai has declined in recent years, aerosols remain one of the major pollutants affecting air quality. Herein, spatio-seasonal variation in aerosol optical properties and aerosol types were studied over a 10-year period (2006–2015) in Shanghai, China, using satellite data from Moderate Resolution Imaging Spectroradiometer (MODIS) and Cloud-Aerosol Lidar with Orthogonal Polarization (CA...
Source: Particuology - December 4, 2019 Category: Science Source Type: research
Effects of volumetric fraction and included angle of composite particles on the discharge of binary mixtures in hoppers
Publication date: Available online 3 December 2019Source: ParticuologyAuthor(s): Liange Ge, Nan Gui, Xingtuan Yang, Jiyuan Tu, Shengyao JiangAbstractThe discharge behavior of particles is important in many industrial applications, such as in the core of a pebble bed reactor, which uses a hopper bed filled with many large particles. In this work, a mixture composed of two particle types, freely discharged from a pebble bed, is simulated using the discrete-element method. One is a spherical pebble of diameter equal to that of the fuel pebble of the reactor. The other is a composite particle comprising three spherical pebbles...
Source: Particuology - December 4, 2019 Category: Science Source Type: research
