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| 1 | Heat transfer of micro-droplet during free fall in drop tube显示文摘To explore the heat transfer of micro-droplet during free fall in the drop tube, the falling velocity and microgravity level are calculated. The Newtonian heat transfer formulation is coupled with the classical heat conduction equation to predict the heat transfer process within micro-droplet. Based on the numerical solution by finite difference method with implicit Euler scheme,the temporal evolution of thermal information inside micro-droplet is obtained including the temperature distribution, cooling rate, temperature difference and gradient. To quantitatively reveal the mechanism how the various factors affect the heat transfer of micro-droplet, the effects of physical properties of liquid metal and cooling gas as well as the micro-droplet size are studied.As the important indicators of heat transfer process, the cooling rate and temperature difference are acquired to systematically investigate the relationship between thermophysical properties and heat transfer process of different metallic micro-droplets. | LI Ming Xing WANG HaiPeng YAN Na WEI BingBo | 2018 | Science China(Technological Sciences)2018，61，7： | 5 |
| 2 | 强磁场下金属凝固过程中的溶质迁移行为及组织演变显示文摘凝固过程是金属材料加工制备中的重要步骤,对金属材料最终的性能起决定作用。熔体流动、溶质迁移、固/液界面形貌演变等是凝固过程中的重要现象,其中合金熔体凝固过程中的溶质迁移行为决定了晶体生长情况和凝固组织的形成。有效地调控溶质迁移,可以改变固/液界面形貌,重塑凝固组织结构。本文综述了强磁场下金属凝固过程中溶质迁移及组织演变,分析了强磁场各种效果的作用机制,介绍了强磁场控制溶质迁移行为及凝固组织演变的具体效果,并提出了功能材料制备的发展方向。 | 周天儒 刘铁 阎金戈 孙金妹 袁双 王强 | 2022 | 铸造技术2022，43，8： | 3 |
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