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首页> 外文期刊>International Journal of Heat and Mass Transfer >Sharp interface numerical simulation of directional solidification of binary alloy in the presence of a ceramic particle
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Sharp interface numerical simulation of directional solidification of binary alloy in the presence of a ceramic particle

机译：陶瓷颗粒存在下二元合金定向凝固的清晰界面数值模拟

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摘要

A sharp interface technique is employed to study the interaction of a solid-liquid interface in a solidifying binary alloy with a ceramic particle in the melt. The application targeted is solidification of a metal-matrix composite. A level-set based sharp interface numerical method is used to study the directional solidification process in the presence of the particle. The transport of solute and heat are computed. The directional solidification calculations are first validated against stability theory. The Mullins-Sekerka stability spectrum is reproduced with good agreement with the theory. The interaction of the cellular interface with a ceramic particle in the melt is then computed. It is shown that, in contrast to the case of a pure material, the ratio of thermal conductivity of the particle to the melt plays no role in determining the front morphology and the result of the particle-front interaction. The diffusion of species controls the evolution of the phase front around the particle. The implications of the results for particle-front interactions in a binary alloy are discussed.
机译：采用尖锐的界面技术研究凝固的二元合金中的固液界面与熔体中的陶瓷颗粒之间的相互作用。目标应用是金属基复合材料的固化。基于水平集的尖锐界面数值方法用于研究在颗粒存在下的定向凝固过程。计算溶质和热量的传输。首先根据稳定性理论对定向凝固计算进行了验证。 Mullins-Sekerka稳定谱的复制与该理论吻合良好。然后计算熔体中蜂窝状界面与陶瓷颗粒的相互作用。结果表明，与纯材料的情况相反，颗粒与熔体的热导率之比在确定前沿形态和颗粒与前沿相互作用的结果方面不起作用。物质的扩散控制了粒子周围相前锋的演化。讨论了结果对二元合金中颗粒-前沿相互作用的影响。

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