Mushy Zone Melting Kinetics Under Microgravity Conditions

机译：微重力条件下的糊状区熔化动力学

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High-purity pivalic acid (PVA) dendrites were observed under convection-free conditions on STS-87 as part of the United States Microgravity Payload Mission (USMP4) flown on NASA's space shuttle Columbia in 1997. The telemetry video data show that PVA dendrites melt without relative motion with respect to the quiescent melt phase. With a small fixed superheat above the melting point, ΔT ≡ T_m — T_∞, designated in the theory by a Stefan number, dendritic fragments melt and shrink steadily. Individual fragments follow a square-root time-dependence as predicted using a quasi-static conduction-limited approach.

机译：1997年，作为美国微重力有效载荷任务（USMP4）的一部分，在STS-87上的无对流条件下观察到高纯度的新戊酸（PVA）树枝状晶体。遥测视频数据显示，PVA树枝状晶体融化了。相对于静态熔体相没有相对运动。在理论上用Stefan数表示的，高于熔点ΔT≡T_m_T_∞的固定的小过热下，树枝状碎片稳定地熔化和收缩。如使用准静态传导受限方法所预测的，各个片段遵循平方根时间依赖性。

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《International Conference on Solidification and Gravity; 20040906-09; Miskolc-Lillafured(HU)》|2004年|P.461-462|共2页
会议地点 Miskolc-Lillafured(HU)
作者
M.E. Glicksman; A. Lupulescu; M.B. Koss;
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Materials Science and Engineering Department, Rensselaer Polytechnic Institute Troy, New York, 12180-3590, USA;

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正文语种 eng
中图分类工程材料一般性问题;
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2. Image-based modelling for fluid flow and permeability prediction within continuously-evolving mushy zone during melting and solidification [J] . Bei Yang, Zhifeng Wang International Journal of Heat and Mass Transfer . 2020,第Feba期

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3. The evolution of the mushy zone during the melting process of a binary nitrate salt [J] . Jiang Dalang, Liao Zhirong, Li Pengda, International Journal of Heat and Mass Transfer . 2019,第OCTa期

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4. Mushy Zone Melting Kinetics Under Microgravity Conditions [C] . M. E. Glicksman, A. Lupulescu, M. B. Koss International Conference on Solidification and Gravity . 2006

机译：在微匍匐条件下搅拌区熔化动力学
5. Thermodynamic and Growth Kinetic Modeling of Solidification From a Metastable Mushy-Zone. [D] . Rodriguez, Justin E. 2016

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6. The Mechanical Strength of Si Foams in the Mushy Zone during Solidification of Al–Si Alloys [O] . Jeon Taik Lim, Ji Won Youn, Seok Yong Seo, 2017

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7. Influence of Local Magnetic Fields on P-Doped Si Floating Zone Melting Crystal Growth in Microgravity [O] . K. Li, W. R. Hu 2003

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8. Investigation of the Crystallization Kinetics of an Incongruent Melting Salt Hydrate under Metastable Conditions. Final Report [R] . Klug, D. L., Pigford, R. L. 1984

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Mushy Zone Melting Kinetics Under Microgravity Conditions

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