##tihuan2##By explicitly modelling (part) of the complex physical processes occurring during drying (e.g. using CFD or finite-element modelling), these computational …
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##tihuan2##A dynamic cluster structure-dependent (CSD) drag coefficient model is proposed to be consistent with the temporal-spatial characteristics of dynamic clusters through the convective accelerations ...
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##tihuan2##[Bohn et al., 2012] studied gassolid reactions by means of a lattice Boltzmann method. Effectiveness factor for diffusion-reaction within a single particle was compared to analytical solutions and ...
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##tihuan2##Numerical simulation for 4 different ratios of initial bed heights (H) to base diameter (D), were performed; viz. 0.5, 1, 2 and 3. Glass beads of density 2600kg/m3 and with an average diameter of ...
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##tihuan2##The theoretical force calculation model of the large coal particle was established by force analysis. ... after a ball mill process, confirming that NFe metals accounted for 3.2% of the < 8 mm ...
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##tihuan2##Here Liu et al. developed a gas−solid reaction method that enables facile fabrication of over 1 µm thick perovskite films for solar modules with high efficiency, stability and reproducibility.
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##tihuan2##In recent years, numerical simulation has emerged as a powerful and promising tool for studying drum drying processes. Its applications include …
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##tihuan2##Axial solid velocity, solid volume fraction, and solid shear viscosity were computed in the riser of a circulating fluidized-bed reactor using a two-phase 2-D computational fluid dynamic model and the model predicts a core-annulus flow in theRiser, similar to that found experimentally.
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##tihuan2##Besides, a coarse-grained method proposed by Sakai et al. [7] reduced the number of particles in the system, ... Case-2 and Case-3. First, the model validation of ROM is carried out for the probability density function (PDF) distribution of particle temperature at two moments of 2.5 s and 7.5 s. Then, the trend of the average …
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##tihuan2##Let us consider a pellet made up of spherical grains; then the Knudsen diffusion coefficient where may be estimated with the aid of the dusty gas model proposed by Mason et al. [13]: __ rpE _ rgE Dex z 1 E 1+ir 8MA i~2 T(1-E)K ( - )( 8)(aRgT) (47) where Dex is the effective Knudson diffusivity rg E is the radius of the grain, is the …
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##tihuan2##The estimation of nanoparticle agglomerates' size in fluidized beds remains an open challenge, mainly due to the difficulty of characterizing the inter-agglomerate van der Waals force. The current approach is to describe micron-sized nanoparticle agglomerates as micron-sized particles with 0.1–0.2-μm asperities. This simplification …
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##tihuan2##DOI: 10.1016/j.applthermaleng.2024.123670 Corpus ID: 270456874; A novel data-driven reduced-order model for the real-time prediction of gas-solid heat transfer in fluidized beds @article{Li2024AND, title={A novel data-driven reduced-order model for the real-time prediction of gas-solid heat transfer in fluidized beds}, author={Xiaofei Li and Qilong Xu …
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##tihuan2##An EMMS/bubbling model for gas–solid bubbling fluidized bed was proposed based on the energy-minimization multi-scale (EMMS) method (Li and Kwauk, 1994).
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##tihuan2##Basically, the size reduction in the Fluid Energy Mill is achieved by intensive particulate collisions inside the gas-solid two-phase flow. This study only focuses on the …
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##tihuan2##Our review identifies some of the main challenges related to (i) the interaction of droplets with particles; (ii) the drying kinetics of granules and its dependence on agglomeration/breakage processes; as …
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##tihuan2##Numerical study on hygroscopic material drying in packed bed In the simulation model of unsteady simultaneous one dimensional heat and mass transfer between gas phase and …
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##tihuan2##The hydrogen-based direct reduction of iron oxide (DRI) provides a sustainable approach to cleaner ironmaking. In this research, for analyzing hydrogen-based DRI in pellet scale, the random pore model (RPM), the most sophisticated non-catalytic gas-solid model, is applied to determine the effects of structural parameters, including …
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##tihuan2##A structural model is presented for the non-catalytic reaction between a porous solid and a gas stream. The model incoporates parameters such as solid grain size, porosity, effective pore diffusion coefficient and allows the quantitative assessment of the role played by these in determining the overall reaction rate.
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##tihuan2##Compared with the existing models, the new model not only has the same functional change relationship, but also can reasonably describe the physical process of gassolid two-phase interaction, and ...
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##tihuan2##Integral to any detailed simulation of the spray drying process is a droplet drying sub-model (Langrish and Fletcher, 2003, Oakley, 2004, Verdurmen et al., 2004). The droplet moisture content—specifically the surface moisture—determines the rate of other processes occurring within a spray tower, such as agglomeration and wall …
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##tihuan2##Flash drying is the process of drying particulate matter by exposing it briefly (typically a few seconds) to a high temperature gas stream, resulting in a rapid rate of …
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##tihuan2##The compressible and turbulent gas-solid multiphase flow inside a fluidized bed opposed jet mill was systematically investigated through numerical simulations …
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##tihuan2##A two-phase compartments model for the selective oxidation of n-butane in a circulating fluidized bed reactor. Catalysis Today, Vol. 61, Issue. 1-4, p. 73. CrossRef; Google Scholar; Krishna, R. and van Baten, J.M. 2001. Using CFD for scaling up gas–solid bubbling fluidised bed reactors with Geldart A powders. Chemical Engineering Journal, Vol ...
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##tihuan2##They reported that a challenging uneven shape of paddy was successfully fluidized and also the drying time reduced, which resulted in improving the drying efficiency [25]. Lavrich et al. [26] have investigated the fluidization behavior of the particles in a small RFB reactor, using a Eulerian-Eulerian approach for a two-phases in ANSYS …
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##tihuan2##Details of the particlewall interaction model considered are available in Kuan et al. (2006). MODEL DESCRIPTION Gas-phase Unsteady, isothermal gas flow properties and turbulence quantities are calculated numerically by solving a set of governing partial differential equations (PDE) using the commercial CFD software ANSYS CFX-10.0.
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##tihuan2##In part seven of the 8-part South Ridge Line series, Dean Freytag demonstrates how to build a steel mill. He begins by identifying the parts of a steel mill including what goes inside a steel mill. The Lil' Norma Blast Furnace is modeled on the South Ridge Line. The furnace is 165 feet high and modeled to HO scale.
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##tihuan2##The standard k -ε model was used for gas phase turbulence modeling.The simulation was done for smooth, rectangular 90 o bend of inclined mill gas duct, located behind the classifier, for fan mill N 80.75 in block 1 of the thermal power plant " Kostolac A " (Serbia), with the aim of determining the pulverized coal distribution on duct ...
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##tihuan2##The present work assesses the potential of reducing CO 2 emissions associated with steel production through the introduction of a decarbonization process downstream of a steel mill eventually producing an alternative fuel/syngas. The analysed system is composed of a calcium looping process for CO 2 separation followed by a …
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##tihuan2##The model provided general criteria for relating structural effects to the reactivity of porous solids and the reaction modulus defined therein allowed the assessment of the relative importance of pore diffusion and chemical kinetics. ... While the use of non-linear kinetics in gassolid reactions (involving porous solids) is a rather unexplored ...
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