用二阶矩模型研究Richtmyer-Meshkov不稳定性诱导湍流混合  

Study on turbulent mixing induced by Richtmyer-Meshkov instability using the second-order moment model

作　　者：杨玟[1] 王丽丽[1,2] 周海兵[1,2] 张树道[1,2] 

机构地区：[1]北京应用物理与计算数学研究所,北京100094 [2]北京大学应用物理与技术研究中心,北京100871

出　　处：《计算力学学报》2014年第5期615-621,共7页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(11072040);中国工程物理研究院科学技术发展基金(2011B0201042;2012B0201028;2012B0201030);装备预研重点实验室基金(9140C690204120C69259)资助项目

摘　　要：发展了考虑密度脉动和各向异性湍流的二阶矩模型,强调了涉及湍流能量产生项的关联。采用该模型对Poggi等的激波管实验进行了模拟。通过与实验结果的比较分析,验证了采用的模型封闭、模型常数、数值算法和程序实现是合适的。在此基础上,进一步探讨了冲击马赫数和Atwood数对混合的影响。The second-order moment model was developed in which density fluctuation and turbulence anisotropy were considered and correlations involved turbulence energy production terms were emphasized. The shock tube experiment of Poggi et al. was simulated by this model. The results were compared with detailed experimental data to prove the validation of the model closure ,model constants, numerical algorithm and the implementation of the model used in the paper. On the basis of these, the influences of shock Mach number and Atwood number on turbulent mixing were further investigated.

关 键 词：二阶矩模型 RICHTMYER-MESHKOV不稳定性 湍流混合 湍流产生项 

分 类 号：O357.5[理学—流体力学]