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激光烧蚀瑞利泰勒不稳定性数值研究
引用本文:叶文华,张维岩,陈光南,贺贤土.激光烧蚀瑞利泰勒不稳定性数值研究[J].强激光与粒子束,1999,11(5):613-618.
作者姓名:叶文华  张维岩  陈光南  贺贤土
作者单位:北京应用物理与计算数学研究所,计算物理实验室,北京8009信箱,100088
基金项目:国家自然科学基金,国家863惯性约束聚变领域资助
摘    要: 介绍了激光烧蚀流体不稳定性计算程序EUL3D,其计算结果与Takabe 公式、FAST2D程序和LASNEX程序的结果以及日本大阪大学激光烧蚀瑞利—泰勒(RT)不稳定性实验,都较好符合,发现了横向电子热传导烧蚀在长波长扰动的非线性瑞利—泰勒不稳定性演变中起重要作用。在合理近似下,得到了烧蚀RT不稳定性线性增长率的预热致稳公式,此公式除包含了烧蚀对流致稳和密度梯度致稳因素外,还包含了Atwood数变小致稳因素,因此与各种情况的二维计算值都很好符合。

关 键 词:瑞利-泰勒不稳定性  不稳定性致稳  高精度格式  活动网格
收稿时间:1900-01-01;

NUMERICAL STUDY OF LASER ABLATIVE RAYLEIGH-TAYLOR INSTABILITY
YE Wen-hua,ZHANG Wei-yan,CHEN Guang-nan,HE Xian-tu.NUMERICAL STUDY OF LASER ABLATIVE RAYLEIGH-TAYLOR INSTABILITY[J].High Power Laser and Particle Beams,1999,11(5):613-618.
Authors:YE Wen-hua  ZHANG Wei-yan  CHEN Guang-nan  HE Xian-tu
Abstract:Physical equations, numerical methods and slide grids of laser ablative hydrodynamic instability in the code EUL3D are introduced. Simulation results of the EUL3D code are good agreements withthose of the Takabe formula, the FASTZD code and the LASNEX code,and the experimental result of laserablative Rayleigh-Taylor instability in Osaka University. The lower Atwood stabilization due to the preheatis observed in simulations and a new growth rate formula is obtained. It includes the density gradient, thelower Atwood number and the ablative convection stabilizations, so it agrees well with all of 2D simulations.
Keywords:Rayleigh-Taylor instability  instability stabilizationl high-resolution scheme  slideGrids
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