Bi-directional flows in constrained systems
Bi-directional flows in constrained systems
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DOI：
10.1017/s0022112007004661
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发表时间：
2007-05-10
影响因子：
3.7
通讯作者：
Hallworth, Mark A.
中科院分区：
文献类型：
--
作者：
Huppert, Herbert E.;Hallworth, Mark A.
我们考虑容器中相对稠密、粘性流体的交换流，容器通过垂直管道连接到其下方的容器，最初充满相对轻的流体。通过实验确定沿管的稠密流体通量的无量纲值，作为两种粘度之比和雷诺数的函数。使用尺寸分析和适当的平衡浮力、惯性力和粘性力，实验数据得到令人满意的折叠。假设稳定的轴对称运动，理论分析捕获了相当一部分，但不是全部处理的；涉及。本文讨论了这些结果在火山管道中岩浆运动的定量应用。这些概念表明，熔岩湖和地壳深处的岩浆库之间的管道中的双向对流如何成为解释长期存在的问题的重要组成部分，即火山口熔岩湖中二氧化硫的脱气量可能超过与火山口中凝固的熔岩量一致的多个数量级。电影可随报纸的在线版本一起观看。
We consider the exchange flow of relatively dense, viscous fluid in a container connected by a vertical pipe to a container beneath it, initially full of relatively light fluid. A non-dimensional value for the flux of dense fluid down the tube is determined experimentally as a function of the ratio of the two viscosities and the Reynolds number. The experimental data are satisfactorily collapsed using dimensional analysis and balancing buoyancy, inertial and viscous forces as appropriate. A theoretical analysis, assuming steady, axisymmetric motion, captures a considerable part, but not all of the processed; involved. The paper discusses quantitative applications of the results to the movement of magma in volcanic conduits. The concepts indicate how bi-directional convection in the conduit between a lava lake and a magma reservoir deep in the crust is the essential ingredient in the explanation of the long-standing problem that the amount of degassing of sulphur dioxide from a lava lake in a volcanic crater can exceed by many orders of magnitude that consistent with the amount of lava solidified in the crater. Movies are available with the online version of the paper.