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

0140027 Leifer该奖项支持圣巴巴拉的加州大学的伊拉·莱弗教授与日本京都大学的Tomoaki Kunugi教授和日本德岛大学的土屋胜美教授进行为期一年的规划访问。 研究人员将制定一项计划，通过将实地观察与实验室研究进行比较，来提高对深海气泡行为的理解。 目前，很少有研究存在于这些气泡的文献中，因此纳入适当的参数化深海气泡行为（化学流体动力学）的数值模拟需要潜在的不合理的假设。 为生成更切合实际的参数化而进行的研究将提高碳氢化合物渗漏、气泡介导的气体向海洋和大气转移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通过广泛的现代方法得到解决。 Leifer教授在气泡流体动力学的实验室研究（在大气压下）和在20至540米深度的现场气泡观测方面都有专长。 土屋教授在大气压和高压实验室研究方面都有丰富的经验，是公认的气泡和气泡尾流流体力学理论专家。 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。 这项研究影响了一些重要领域，如注入海洋二氧化碳以应对人类排放，研究环境中渗漏油和碳氢化合物的命运，以及利用上升的渗漏气泡定位海洋石油资源。 通过交流思想和技术，该项目将扩大我们的基础知识，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.