Investigation of free-s urface turbulent heat and mass transfer by means of large-scale direct numerical simulation and high-precision turbule nt measurement

通过大规模直接数值模拟和高精度湍流测量研究自由表面湍流传热传质

• 批准号: 21760156
• 负责人: YAMAMOTO Yoshinobu
• 金额: $ 3万
• 依托单位: University of Yamanashi (2011)Kyoto University (2009-2010)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21760156/
• 关键词: 自由表面流; 乱流熱物質移動; 直接数値計算; 乱流熱物資移動; 大規模直接数値計算; 気液界面; MHD; 乱流熱伝達; 自由表面乱流; 自由表面流; 乱流熱物質移動; 直接数値計算; 乱流熱物資移動; 大規模直接数値計算; 気液界面; MHD; 乱流熱伝達; 自由表面乱流

In this study, we successfully conducted a direct numerical simulation of a high-Fr turbulent open-channel flow at a Froude number of 1. 8 and a Reynolds number of 2325 based on bulk velocity, gravitational acceleration, water depth, and kinetic viscosity, using the multi-interface advection and reconstruction solver(MARS). Near the free-surface, wall-normal turbulent intensity and energy-dissipation rates increase toward the free-surface, and the tendencies of turbulent statistical quantities near the free-surface are in good agreement with the experimental measurements obtained using a laser Doppler anemometer(LDA). Finally, we established the high-precision direct numerical simulator, which can be covered the effects of high-Pr heat transfer and magnetic force for design activity to the next generation fusion reactor engineering.

在这项研究中，我们成功地对高-fr湍流开放通道流进行了直接的数值模拟，以1. 8的数量为1。8，雷诺数为2325，基于散装速度，引力加速度，水深和动力学粘度，使用多界面的粘度和动力学粘度，使用多界面的建议和重新构造索引（Mars）。在自由表面附近，壁正常的湍流强度和能量隔离率向自由表面增加，并且在自由地面附近的湍流统计量趋势与使用激光多普勒多普勒态度计（LDA）获得的实验测量非常吻合。最后，我们建立了高精度直接数值模拟器，该模拟器可以涵盖高PR传热和磁力对下一代融合反应堆工程的影响。