It is well understood that the longevity of a blast furnace campaign is limited by the wear of its *** dissolution and erosion of carbon refractories by the flow of sub - saturated molten iron are in part,the causes f...
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It is well understood that the longevity of a blast furnace campaign is limited by the wear of its *** dissolution and erosion of carbon refractories by the flow of sub - saturated molten iron are in part,the causes for such hearth *** a measure to protect the hearth *** of titanium - bearing materials into the furnace has become a common procedure during the critical stages of a *** of Ti ( C,N) particles are formed near the cooler eroded regions within the hot metal bath due to reduced solubility of titanium which may promote the formation of a protective layer along the eroded hearth *** a step to gain a fundamental understanding of the titanium behavior in a blast furnace hearth,a steady - state 3D CFD model based on BlueScope Steel ' s Port Kembla No.5 Blast Furnace hearth was *** the simulation,the hearth flow and temperature field were solved and validated ***,the formation behavior of the solid TiC particles were modeled by solving the species transport combined with thermodynamics of key chemical *** effects of a sitting and floating deadman states were *** was found that in a sitting deadman,a high concentration of TiC particles were held up dynamically near the cooler regions of the hearth,in particular along the hearth bottom and corner *** no trace of TiC particle was found along the hearth surface in a floating deadman because the large volume of liquid flowing through the coke free zone enhances overall hearth mixing which increases the near surface temperature above the Fe - Ti - C equilibrium temperature.
This paper presents a numerical study of particle-fluid flow in complex three-dimensional (3D) systems by means of Combined Continuum and Discrete Method (CCDM). In the CCDM, the motion of discrete particles phase is ...
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This paper presents a numerical study of particle-fluid flow in complex three-dimensional (3D) systems by means of Combined Continuum and Discrete Method (CCDM). In the CCDM, the motion of discrete particles phase is obtained by Discrete Particle Method (DPM) which applies Newton's laws of motion to every particle and the flow of continuum fluid is described by the local averaged Navier-Stokes equations that can be solved by the traditional Computational Fluid Dynamics (CFD). This method has been increasingly used worldwide, but so far its application is limited to relatively simple flow systems. In this work, the simulation is achieved by incorporating a DPM code into the commercial CFD software package Fluent that can be readily used for complex CFD problems. The applicability of this development is demonstrated in the study of the particle-fluid flow in various 3D systems including pneumatic conveying bend, cyclone separator and circulating fluidized bed. It is shown that the numerical results are qualitatively in good agreement with those measured, and can generate information leading to better understanding of the internal flow structure of these systems.
This paper presents a numerical study of the flow and segregation of particles over flat blades in a vertical cylindrical mixer by using discrete element method. simulations are conducted on binary mixtures of spheres...
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Commercial Off-The-Shelf (COTS) simulation Packages (CSPs) are widely used to facilitate the creation of simulation models using some kind of visual interactive interface. CSPs have "evolved" over the years ...
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ISBN:
(纸本)0780395204
Commercial Off-The-Shelf (COTS) simulation Packages (CSPs) are widely used to facilitate the creation of simulation models using some kind of visual interactive interface. CSPs have "evolved" over the years and are well used to support modeling demands in different market niches and domains. However, in terms of distributed simulation, there is almost a complete lack of support for interoperability. The advent of the High Level Architecture (HLA) standard makes it possible to connect distributed model components together. The model components can be developed using specific CSPs best suited to the application area. In this paper, a CSP Emulator (CSPE) is proposed to investigate the interfaces between the CSPs and the HLA Runtime Infrastructure. In addition to support for standalone models as provided by current CSPs, the CSPE has some new features needed for building distributed models. An evaluation is conducted between CSPE and Simul8, one of the popular CSPs.
This panel paper presents the views of six researchers and practitioners of simulationmodeling. Collectively we attempt to address a range of key future challenges to modeling methodology. It is hoped that the views ...
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ISBN:
(纸本)9780780387867
This panel paper presents the views of six researchers and practitioners of simulationmodeling. Collectively we attempt to address a range of key future challenges to modeling methodology. It is hoped that the views of this paper, and the presentations made by the panelists at the 2004 Winter simulation Conference will raise awareness and stimulate further discussion on the future of modeling methodology in areas such as modeling problems in business applications, human factors and geographically dispersed networks; rapid model development and maintenance; legacy modeling approaches; markup languages; virtual interactive process design and simulation; standards; and Grid computing.
This paper presents an averaging method to link discrete to continuum variables of granular materials. Compared to the other methods proposed in the literature, it has advantages of being applicable to all flow regime...
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This paper presents an averaging method to link discrete to continuum variables of granular materials. Compared to the other methods proposed in the literature, it has advantages of being applicable to all flow regimes, and to granular flows with or without the effect of physical boundaries. Its application is demonstrated in the determination of the macroscopic properties such as mass density, velocity, stress, and couple stress distributions of a hopper flow, where the discrete results are generated by means of discrete particle simulation. While highlighting the need for considering properly the effect of physical boundaries, the results indicate that the proposed method is an effective way to determine the flow properties of granular materials.
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