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重力对两维液态泡沫点输入强制渗流的影响
  • ISSN号：0023-074X
  • 期刊名称：《科学通报》
  • 时间：0
  • 分类：O314[理学—一般力学与力学基础;理学—力学]
  • 作者机构：[1]中国科学院过程工程研究所,北京100080
  • 相关基金：致谢本工作为国家自然科学基金（批准号：20336040,20490201）资助项目.
作者： 孙其诚[1], 葛蔚[1], 黄晋[1]
关键词： 液态泡沫, 渗流, 微重力, 软凝聚态物质, 复杂系统
中文摘要：

液态泡沫由大量气泡密集堆积在微量表面活性剂溶液中形成，具有高度有序的结构和独特的流变特性，是典型的复杂系统，与常见的固体泡沫和多孔介质截然不同．影响液态泡沫结构和流变特性的惟一重要因素就是泡沫内部的微量液体．这些微量液体受重力与毛细管力会在泡沫通道上（柏拉图通道和节点，亦即Plateau border和vertex）发生渗流，柏拉图通道和节点也往往同时发生几何拓扑变化，释放表面能．该自组织过程是由流体耗散趋于极小和泡沫表面能趋于极小两种机制的相互协调控制的．重力会影响流体耗散趋于极小趋势的强弱，进而造成不同的自组织过程，影响泡沫内的渗流．本文模拟了Hele-Shaw Cell内两维液态泡沫（大小为12cm×14cm×3mm）在8种重力加速度（从g=9．8m／s^2到g=0m／s^2）下点输入的强制渗流，发现在竖直和水平方向的渗流波传播位置与时间的关系很好地符合幂函数形式，指数分别为0．536＋5．29×10^-3g和0．479—7．27×10^-3g，在不同重力下两者之和接近常数1．015，该结果将有助于进一步分析泡沫内部的协调机制．

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期刊信息
  • 《科学通报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国科学院
  • 主编：周光召
  • 地址：北京东黄城根北街16号
  • 邮编：100717
  • 邮箱：csb@scichina.org
  • 电话：010-64036120 64012686
  • 国际标准刊号：ISSN：0023-074X
  • 国内统一刊号：ISSN：11-1784/N
  • 邮发代号:80-213
  • 获奖情况:
  • 首届国家期刊奖,中国期刊方阵“双高”期刊,第三届中国出版政府奖
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,美国数学评论（网络版）,美国工程索引,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:81792