...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Dimensional crossover in the coalescence dynamics of viscous drops confined in between two plates
【24h】

Dimensional crossover in the coalescence dynamics of viscous drops confined in between two plates

机译：限制在两个板之间的粘性液滴的聚结动力学中的尺寸交叉

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Coalescence of liquid drops is a daily phenomenon familiar to everybody and is related to many fields from biology to astronomy and also related to a variety of practical problems in industry. However, the detailed physical understanding of the dynamics has been revealed only recently with the aid of high-speed camera, high-performance computer, and scaling analysis. In this study, coalescence of a viscous drop to a bath of the same liquid is studied in a confined space. This is because dealing with a small amount of liquid drops becomes increasingly important (e.g., in industrial and biological applications). Here, the aqueous drop and bath are surrounded by low-viscosity oil and sandwiched by two parallel plates of the cell. We quantify experimentally the width of a neck that bridges the drop and the bath during coalescence. As a result, we find that the neck width increases linearly with time at short times, but the dynamics slows down significantly at longer times. Thanks to simple and original scaling arguments, we clearly show that this transition of the dynamics with time in a single coalescence event is brought about by a crossover from a three-dimensional viscous dynamics for a spherical drop to a quasi two-dimensional one for a disk drop. In addition, we report an unusual type of coalescence that is possibly caused by naturally accumulated electric charge in the confined geometry and whose dynamics seems self-similar.
机译：液滴的聚结是每个人都熟悉的日常现象，涉及从生物学到天文学的许多领域，还涉及工业中的各种实际问题。但是，直到最近才借助高速摄像头，高性能计算机和缩放比例分析揭示了对动力学的详细物理理解。在这项研究中，在密闭空间中研究了粘性液滴在相同液体浴中的聚结。这是因为处理少量液滴变得越来越重要（例如，在工业和生物应用中）。在这里，水滴和水浴被低粘度的油包围，并被池的两个平行板夹在中间。我们通过实验量化了在聚结期间桥接液滴和熔池的颈部宽度。结果，我们发现颈部宽度在短时间内随时间线性增加，但动力学在较长时间下显着降低。多亏了简单和原始的比例论证，我们清楚地表明，在单个合并事件中，动力学随时间的这种过渡是由从球状液滴的三维粘性动力学到球状液滴的准二维动力学的交叉引起的。磁盘丢失。此外，我们报告了一种不寻常的聚结类型，它可能是由受限几何结构中的自然累积电荷引起的，并且其动力学似乎是自相似的。

著录项

  • 来源
  • 作者

    Maria Yokota; Ko Okumura;

  • 作者单位

    Department of Physics, Graduate School of Ochanomizu University, 2-1-1, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan;

    Department of Physics, Graduate School of Ochanomizu University, 2-1-1, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号