An Experimental Investigation of Water- Magma Phase Mingling in Sub-aqueous Volcanic Eruptions

在适当的条件下，火山岩浆和地表水之间的相互作用是爆炸性的；然而，火山学家们对相混合的先决条件缺乏基本的了解。为了研究这个问题，研究人员正在进行复杂的实验，同时使用粒子图像测速仪(PIV)和激光诱导荧光(LIF)。混合机制将通过在不同流动条件和几何形状下叠加相边界(来自LIF)和速度场(来自PIV)来确定。在分束器和滤光器的帮助下，LIF和PIV图像被分别拍摄在同一图像平面上。这项研究是由马萨诸塞大学达特茅斯大学机械工程教授彼得·弗里德曼博士和罗德岛大学火山学家史蒂夫·凯里博士共同领导的。马萨诸塞大学达特茅斯分校是一所州立大学，拥有年轻但前景看好的研究生教育项目，服务于马萨诸塞州东南部不同种族的社区。这项研究具有潜在的跨学科应用，包括核安全、金属加工和超导体的低温冷却。

Under appropriate conditions the interaction between volcanic magma and surface water is explosive; however, volcanologists lack a fundamental understanding about the prerequisite phase mingling. To study this problem, investigators are performing sophisticated experiments that simultaneously employ particle image velocimetry (PIV) and laser induced fluorescence (LIF). Mingling mechanisms will be determined by superposing phase boundaries (from LIF) with velocity fields (from PIV) under varying flow conditions and geometries. LIF and PIV images are captured on separate cameras focused on a single image plane with the aid of a beam splitter and optical filters.The research is a collaborative effort administered by Dr. Peter Friedman a mechanical engineering professor at the University of Massachusetts Dartmouth and Dr. Steve Carey, a volcanologist at the University of Rhode Island. The University of Massachusetts Dartmouth is a state university with a young but promising graduate education program serving the ethnically diverse communities of Southeastern Massachusetts. The research has potential cross-disciplinary applications including nuclear safety, metal processing, and cryogenic cooling of superconductors.