https://scholars.lib.ntu.edu.tw/handle/123456789/80905
標題: | 單向固化中引發液柱對流之流力機制研究(3/3) | 作者: | 陳發林 | 公開日期: | 31-十月-2004 | 出版社: | 臺北市:國立臺灣大學應用力學研究所 | 摘要: | 國立臺灣大學應用力學研究所 In directional solidification of binary alloys, a dendritic mush is formed between the bulk melt above and the eutectic solid below. We investigate the convective instabilities in such a three-layer system during solidification process, which differs from previous two-layer model by the solid layer. Due to the existence of the solid layer, the mush/solid interface is allowed to deform so that the mushy layer becomes less stable while the stability of the melt is virtually unchanged. The mushy layer also becomes less stable when the latent heat of fusion generated in the mush is larger, while the stability of the melt above is not affected because the heat is transferred through the solid layer towards the cooling boundary below. Present results may help reflect the reality that the heat transferring to the cooling boundary decreases with time so that the stability of the mush will be enhanced during solidification process, and explain the discrepancy between former theoretical predictions and experimental measurements. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/21705 | 其他識別: | 922212E002034 | Rights: | 國立臺灣大學應用力學研究所 |
顯示於: | 應用力學研究所 |
檔案 | 描述 | 大小 | 格式 | |
---|---|---|---|---|
922212E002034.pdf | 145.24 kB | Adobe PDF | 檢視/開啟 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。