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OALib Journal期刊
ISSN: 2333-9721
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铝合金熔体在多孔介质中的二维微管渗流模型
Abstract:
？在对填料颗粒堆积简化的基础上,建立了由渗流单元组成的二维微管模型.使用该模型对渗流过程进行模拟计算,渗流时间的计算值与实验值符合良好,并获得渗流过程的如下新规律:铝熔体在流过填料颗粒时,在填料颗粒的背压区封闭一定质量的气体,封闭的气体使附加孔隙率和通孔度增大.在渗流过程中静压力的变化分两个阶段:渗流开始时,静压力先缓慢增加,在渗流结束时瞬间,压力增加到最大值;后者对高孔隙率多孔铝的制备有重要意义.这些渗流规律为控制渗流过程和孔结构提供了依据.
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