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Discrete particle simulation of solid flow in a model blast furnace

机译：模型高炉中固体流的离散粒子模拟

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This paper reports a numerical study of solid flow in a model blast furnace under simplified conditions by means of discrete particle simulation (DPS). The applicability of the proposed DPS approach is validated from its good agreement with the experiment in terms of solid flow patterns. It is shown that the DPS is able to generate a stagnant zone without any need for any arbitrary treatment, and capture the main features of solid flow within the furnace at a microscopic level. The results confirm that the solid flow in a blast furnace can be divided into four different flow regions. However, the flow is strongly influenced by the front and rear walls in a 2D slot model furnace whereas the predicted stagnant zone decreases significantly with wall sliding friction. In a 3D model with periodic boundary conditions incorporated, a smaller stagnant zone is obtained. The effects of solid flow rate, particle properties such as sliding and rolling friction coefficients on the solid flow are also investigated. The results are analysed in terms of solid flow patterns, solid velocity field, porosity distribution and normal force structure. The implication to blast furnace operation is discussed.
机译：本文通过离散粒子模拟（DPS）报道了简化条件下模型高炉中固相流动的数值研究。提出的DPS方法的适用性已从其与固体流型方面与实验的良好一致性中得到了验证。结果表明，DPS能够在不需要任何处理的情况下产生停滞区，并在微观水平上捕获炉内固体流的主要特征。结果证实，高炉中的固体流可分为四个不同的流动区域。然而，在二维槽式炉中，流动受到前壁和后壁的强烈影响，而预测的停滞区会随着壁滑动摩擦而显着降低。在结合了周期性边界条件的3D模型中，可以获得较小的停滞区。还研究了固体流速，颗粒性质（例如滑动和滚动摩擦系数）对固体流动的影响。根据固体流型，固体速度场，孔隙率分布和法向力结构对结果进行了分析。讨论了对高炉操作的影响。

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