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首页> 外文期刊>Journal of Crystal Growth >Is it important to account for heat transport and interfacial attachment kinetics when calculating the shape of directionally solidified drops?
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Is it important to account for heat transport and interfacial attachment kinetics when calculating the shape of directionally solidified drops?

机译:在计算定向凝固液滴的形状时,考虑传热和界面附着动力学是否重要?

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摘要

We focus on the calculation of directionally solidified drop shapes used for estimation and verification of growth angle values. While estimation of the angle at the onset of solidification does not require knowledge of heat transport and interfacial kinetics, verification of this estimate does involve a detailed simulation which includes these phenomena and is also based on an assumption that the angle is a constant. Here we present results aimed at assessing the importance of including heat transport and interfacial attachment kinetics (when relevant) in the verification procedure. We find that, in all cases studied here, neglecting these phenomena may lead to errors of up to 2° in terms of a verified growth angle value. It is therefore obvious that, in the event that such an error cannot be tolerated, heat transport and (if necessary) interface attachment kinetics should be considered in the verification procedure.
机译:我们专注于定向凝固的液滴形状的计算,该液滴用于估计和验证生长角值。尽管在凝固开始时就不需要估算角度,也不需要了解传热和界面动力学,但对该估算的验证确实涉及到一个包含这些现象的详细模拟,并且还基于该角度是恒定的假设。在这里,我们提出旨在评估验证程序中包括传热和界面附着动力学(如果相关)的重要性的结果。我们发现,在本文研究的所有情况下,如果忽略这些现象,就可能导致经验证的生长角度值误差高达2°。因此,很明显,在无法容忍这种错误的情况下,应在验证过程中考虑传热和(必要时)界面附着动力学。

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