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

0140027Leifer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 Kunugi教授和日本德岛大学的Katsumi土屋教授为期一年的计划访问。研究人员将制定一项计划，通过对比现场观察和实验室研究，提高对深海气泡行为的理解。目前，关于这些气泡的研究文献很少，因此将深海气泡行为（化学-流体动力学）的适当参数化纳入数值模拟需要潜在的不合理假设。研究产生更真实的参数化将提高数值模型的准确性，例如碳氢化合物渗透、气泡介导的气体向海洋和大气的转移。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，允许用广泛的现代方法解决一个重要的技术问题。Leifer教授在气泡流体动力学（大气压下）的实验室研究和20至540米深度的现场气泡观测方面都有专长。土屋教授拥有大气和高压的实验室研究经验，是气泡和气泡尾迹流体动力学领域公认的理论专家。Kunugi教授是公认的两相流直接数值模拟专家。该项目将为两国共同努力提供一个很好的机会。这项研究影响了重要的领域，如海洋二氧化碳注入以对抗人类排放，研究渗漏油和碳氢化合物在环境中的命运，以及利用上升的渗漏气泡定位海洋石油资源。通过思想和技术的交流，该项目将扩大我们的基础知识基础，促进国际了解与合作。

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.