...
首页> 外文期刊>Journal of Volcanology and Geothermal Research >Counter-current convection in a volcanic conduit
【24h】

Counter-current convection in a volcanic conduit

机译:火山管道中的逆流对流

获取原文
获取原文并翻译 | 示例
           

摘要

Volcanoes of Strombolian type are able to maintain their semi-permanent eruptive states through the constant convective recycling of magma within the conduit leading from the magma chamber. In this paper we study the form of this convection using an analytic model of degassing two-phase flow in a vertical channel. We provide solutions for the flow at small Grashof and large Prandtl numbers, and we suggest that permanent steady-state counter-current convection is only possible if an initial bubbly counter-current flow undergoes a regime transition to a churn-turbulent flow. We also suggest that the magma in the chamber must be under-pressured in order for the flow to be maintained, and that this compromises the assumed form of the flow. (C) 2018 Elsevier B.V. All rights reserved.
机译:Strombolian类型的火山能够通过从岩浆室引出的导管内岩浆的不断对流循环来维持其半永久性喷发状态。在本文中,我们使用对垂直通道中的两相流进行脱气的解析模型研究对流的形式。我们为小Grashof流量和大Prandtl流量提供了解决方案,并且我们建议仅当初始气泡状逆流经历状态转换为搅动湍流时,才能实现永久稳态逆流对流。我们还建议必须对腔室内的岩浆施加负压,以保持流动,并且这会损害流动的假定形式。 (C)2018 Elsevier B.V.保留所有权利。

著录项

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