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The development of simple correlation for carbon particles dissolving into liquid metal by using numerical models

机译：利用数值模型开发碳颗粒溶解在液态金属中的简单相关性

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In this study, a single carbon particle dissolving into liquid metal has been numerically investigated by using a quasi-steady flow model and a transient-dissolution model. The dissolution rate is assumed to be controlled by carbon-mass transfer in liquid metal. It is found that the particle Reynolds number has significant effects on the dissolution rate and distribution on particle surface. If the Reynolds number is low, the highest dissolution rate is at the front stagnation point and monotonically decreases to the rear stagnation point. On the other hand, if the Reynolds number is high, the lowest dissolution rate is close to the flow separation point on particle surface, and the highest and the local highest dissolution rates are respectively at front and rear stagnation points because of the wake formed behind the particle. Furthermore, the shape evolution of dissolving particle at low and high Reynolds numbers are also simulated by using a transient-dissolution model. It is found that the particle body evolves into a self-similar shape during dissolution process. Due to the different dissolution rates and distributions on particle surface, the dissolution time and the shape variation during dissolution process are drastically different. It is found that the particle Reynolds number (the flow agitation) significantly affects particle dissolution. In addition, to simulate a large amount of carbon particles dissolving into liquid metal during steelmaking process, a simple correlation of particle dissolution rates is preliminarily established by using the quasis-steady flow model and further modified according to the numerical results obtained by using the transient-dissolution model. (C) 2018 Elsevier Ltd. All rights reserved.
机译：在这项研究中，已经通过使用准稳态流动模型和瞬态溶解模型对溶解在液态金属中的单个碳颗粒进行了数值研究。假设溶解速度受液态金属中碳的质量转移控制。发现颗粒雷诺数对颗粒表面的溶解速率和分布有显着影响。如果雷诺数低，则最高溶出速率在前停滞点，而单调降低到后停滞点。另一方面，如果雷诺数高，则最低的溶出速率接近颗粒表面上的流动分离点，并且由于后面形成的尾流，最高和局部最高溶出率分别在前和后停滞点。粒子。此外，还使用瞬态溶解模型模拟了低雷诺数和高雷诺数下的溶解颗粒的形状演变。发现在溶解过程中颗粒体发展为自相似形状。由于不同的溶解速度和在颗粒表面的分布，溶解过程中的溶解时间和形状变化完全不同。发现颗粒雷诺数（流动搅拌）显着影响颗粒溶解。另外，为了模拟炼钢过程中大量的碳颗粒溶解到液态金属中，使用准稳态流模型初步建立了颗粒溶解速率的简单相关关系，并根据瞬态获得的数值结果进行了进一步修改。 -溶解模型。 （C）2018 Elsevier Ltd.保留所有权利。

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