U.S.-Japan Planning Visit: Scaling Bubble Behavior Between the Deep-Sea and Laboratory

该奖项支持加州大学圣巴巴拉分校的Ira Leifer教授、日本京都大学的Tomoaki Kougi教授和日本德岛大学的KatSumi Tuchiya教授之间为期一年的计划访问。研究人员将制定一项计划，通过将现场观察与实验室研究相互比较，来提高对深海气泡行为的理解。目前，文献中关于这些气泡的研究很少，因此，将深海气泡行为(化学流体动力学)的适当参数纳入数值模拟中需要潜在的不合理的假设。研究生成更真实的参数将提高碳氢化合物渗漏、气泡介导的气体进入海洋和大气等过程的数值模型的准确性。这项研究将促进具有互补专业知识和能力的三个小组之间的合作，使一个重要的技术问题能够用一系列广泛的现代方法来解决。Leifer教授在(大气压力下)气泡流体动力学的实验室研究和在20至540米深度的现场气泡观测方面拥有专业知识。土屋教授在大气和高压下的实验室研究方面拥有丰富的经验，是公认的气泡和气泡尾迹流体力学的理论专家。库努吉教授是公认的两相流直接数值模拟专家。该项目将为两国的合作提供一个很好的机会。这项研究影响到一些重要领域，如海洋二氧化碳注入以对抗人类排放、研究渗漏石油和碳氢化合物在环境中的去向以及利用不断上升的渗漏气泡来定位海洋石油资源。通过思想和技术的交流，这个项目将扩大我们的基础知识基础，促进国际理解与合作。

0140027LeiferThis award supports a one year planning visit between Professor Ira Leifer at the University of California at Santa Barbara and Professor Tomoaki Kunugi of Kyoto University in Japan and Professor Katsumi Tsuchiya of the University of Tokushima in Japan. The researchers will devise a plan to improve understanding of the behavior of deep-sea bubbles by intercomparing field observations with laboratory studies. Currently, few studies exist in the literature on these bubbles, and thus incorporation of appropriate parameterizations of deep-sea bubble behavior (chemico-hydrodynamic) into numerical simulations requires potentially unjustified assumptions. Research to generate more realistic parameterizations will improve the accuracy of numerical models of processes such as hydrocarbon seepage bubble-mediated gas transfer into the ocean and atmosphere. This research will facilitate collaboration between three groups with complementary expertise and capabilities, allowing an important technical problem to be addressed with a broad array of modern methods. Professor Leifer has expertise both in laboratory research of bubble hydrodynamics (at atmospheric pressure) and field bubble observations at depths from 20 to 540 m. Professor Tsuchiya has experience in laboratory research both at atmospheric and high pressure, and is a well-recognized theoretical expert on bubbles and bubble wake hydrodynamics. Professor Kunugi is a well-recognized expert on direct numerical simulation of two-phase flows. The project will offer a good opportunity to join efforts between the two countries. This research impacts important areas such as oceanic carbon dioxide injection to counter human emissions, studying the fate of seep oil and hydrocarbons in the environment, and the use of rising seep bubbles for location of marine petroleum resources. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation.