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Intrusive gravity currents.

机译:侵入性重力流。

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摘要

This thesis will discuss equilibrium and non-equilibrium intrusive gravity currents or intrusions, in two layer and continuous stratifications. Although the associated time and length scales are significantly smaller than those appropriate to most natural flows of interest, insights can occur when discussing actual laboratory experiments provided that the Reynolds number is sufficiently large so that viscous effects do not show a leading order influence. Lock release experiments were performed and the speed was analyzed using DigImage and Digiflow. The equilibrium intrusion is discussed which is an extension of the doubly symmetric case, where the density of the current is the depth-weighted mean density of the layers. The non-equilibrium case is also discussed and unlike the equilibrium flow, the intrusion fluid steadily rises or falls behind the intrusion front, adding an additional source of energy to drive the flow. These intrusions were performed in two-layer and continuous stratifications. The results presented in this thesis include experimental and numerical data and follow closely to the work of previous researchers' theoretical models.
机译:本文将讨论两层和连续分层的平衡和非平衡侵入式重力流或侵入。尽管相关的时间和长度尺度明显小于适合大多数自然兴趣流的尺度,但是在讨论实际实验室实验时,只要雷诺数足够大,以至于粘性效应不会显示主导效应,就可以得出真知灼见。进行了锁释放实验,并使用DigImage和Digiflow分析了速度。讨论了平衡侵入,它是双对称情况的扩展,其中电流的密度是各层的深度加权平均密度。还讨论了非平衡情况,与平衡流不同,入侵流体稳定地在入侵前沿的后方上升或下降,增加了额外的能量来驱动流量。这些入侵分为两层且连续进行。本文提出的结果包括实验和数值数据,并紧跟以前的研究人员的理论模型的工作。

著录项

  • 作者

    Hang, Alice Thanh.;

  • 作者单位

    University of California, San Diego.;

  • 授予单位 University of California, San Diego.;
  • 学科 Engineering Mechanical.
  • 学位 M.S.
  • 年度 2009
  • 页码 73 p.
  • 总页数 73
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

  • 入库时间 2022-08-17 11:38:28

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