基于微观方法对液态铝泡沫宏观析液过程的数值模拟研究

李科; 解茂昭; 刘红

doi:10.3879/j.issn.1000-0887.2009.12.006

基于微观方法对液态铝泡沫宏观析液过程的数值模拟研究

doi: 10.3879/j.issn.1000-0887.2009.12.006

李科^1,2,3,
解茂昭¹,
刘红¹

1.
大连理工大学能源与动力学院,辽宁大连 116024;2.内蒙古科技大学能源与环境学院,内蒙古包头 014010;3.清华大学航天航空学院,北京 100084

基金项目: 国家自然科学基金资助项目(50876017)

详细信息

作者简介:
李科(1981- ),男,内蒙古鄂尔多斯人,副教授,博士(联系人.E-mail:like16615.student@sina.com);解茂昭(1944- ),男,成都人,教授,博士生导师(E-mail:xmz@dlut.edu.cn).

中图分类号: O368;TK121
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出版历程
- 收稿日期: 2009-02-17
- 修回日期: 2009-11-11
- 刊出日期: 2009-12-15

Microscopical and Macroscopical Numerical Study on the Drainage Process in Fabricating Foamed Aluminum

1.
School of Energy and Power Engineering, Dalian University of Technology, Dalian, Liaoning 116024, P. R. China;

摘要

摘要: 通过微元管内流动模型，研究了液态金属熔体泡沫体内单条Plateau边界内析液过程中的速度场．分析了不同Newton表面粘度，即不同的气液界面运动能力（无量纲参数M）下，Plateau边界内速度的分布．结果显示：在相同的气液界面运动能力和曲率半径条件下，泡沫体内固壁处Plateau边界内速度约是内部Plateau边界内速度的6～8倍，从而解释了不同容器内泡沫体析液速率的差异现象；发现M存在1个临界值，在此值的两边，液膜厚度与曲率半径的比值对Plateau边界内速度的影响呈现出相反的趋势．结合多尺度方法，进而利用微观计算结果建立了泡沫体的整体宏观析液模型，将模型计算结果和经典析液方程计算结果及实验值作了比较，结果表明：该文模型计算结果与实验值在泡沫层上部、中部吻合较好，M值和气泡大小对析液过程有显著影响．
- 泡沫铝 /
- 析液 /
- Plateau边界 /
- 含液率 /
- 五边形十二面体
Abstract: Velocity field in a single plateau border of aluminum foam during drainage process was studied by a mathematic model for the flow inside a micro-channel.It is shown that the liquid/gas interface mobility,which is characterized by the Newtonian surface viscosity,has substantial effect on velocity inside single plateau border.It's found that at the same liquid/gas interfacial mobility (M)and same radius of curvature,the max velocity inside an exterior plateau border is about 6~8 times as large as that inside an interior plateau border.It's also found that a critical value of the interfacial mobility in interior plateau border,for values greater or less than which the effects of the film thickness on the velocity in plateau border show opposite tendencies.Based on the results from the microscopical model,a new macroscopical drainage model was presented for aluminum foams.Comparisons of computed results by this model with experimental data from the literature and with those from the classical drainage equation show a reasonable agreement.Furthermore,computational results reveal that the liquid holdup of foams is dependent strongly on the value of M and bubble radius.
- foamed aluminum /
- drainage /
- Plateau border /
- liquid holdup /
- pentagonal dodecahedron

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参考文献(24)

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基于微观方法对液态铝泡沫宏观析液过程的数值模拟研究

doi: 10.3879/j.issn.1000-0887.2009.12.006

作者简介:
李科(1981- ),男,内蒙古鄂尔多斯人,副教授,博士(联系人.E-mail:like16615.student@sina.com);解茂昭(1944- ),男,成都人,教授,博士生导师(E-mail:xmz@dlut.edu.cn).

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Microscopical and Macroscopical Numerical Study on the Drainage Process in Fabricating Foamed Aluminum

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留言板

基于微观方法对液态铝泡沫宏观析液过程的数值模拟研究

doi: 10.3879/j.issn.1000-0887.2009.12.006

作者简介: 李科(1981- ),男,内蒙古鄂尔多斯人,副教授,博士(联系人.E-mail:like16615.student@sina.com);解茂昭(1944- ),男,成都人,教授,博士生导师(E-mail:xmz@dlut.edu.cn).

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出版历程

Microscopical and Macroscopical Numerical Study on the Drainage Process in Fabricating Foamed Aluminum

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出版历程

目录

作者简介:
李科(1981- ),男,内蒙古鄂尔多斯人,副教授,博士(联系人.E-mail:like16615.student@sina.com);解茂昭(1944- ),男,成都人,教授,博士生导师(E-mail:xmz@dlut.edu.cn).