Studying Validity of Single-Fluid Model in Inertial Confinement Fusion  

作　　者：谷建法 范证锋 戴振生 叶文华 裴文兵 朱少平 

机构地区：[1]Institute of Applied Physics and Computational Mathematics

出　　处：《Communications in Theoretical Physics》2014年第3期370-376,共7页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.11105013,10935003,11275031,11205017,and11075023,;the National Basic Research Program of China under Grant No.2013CB834110,;the National High-Tech R&D Program(863 Program)under Grant No.2012AA01A303

摘　　要：The validity of single-fluid model in inertial confinement fusion simulations is studied by comparing the results of the multi- and single-fluid models. The multi-fluid model includes the effects of collision and interpenetration between fluid species. By simulating the collision of fluid species, steady-state shock propagation into the thin DT gas and expansion of hohlraum Au wall heated by lasers, the results show that the validity of single-fluid model is strongly dependent on the ratio of the characteristic length of the simulated system to the particle mean free path. When the characteristic length L is one order larger than the mean free path A, the single-fluid model＇s results are found to be in good agreement with the multi-fluid model＇s simulations, and the modeling of single-fluid remains valid. If the value of L/A is lower than 10, the interpenetration between fluid species is significant, and the single-fluid simulations show some unphysical results; while the multi-fluid model can describe well the interpenetration and mix phenomena, and give more reasonable results.

关 键 词：multi-fluid model interpenetration mixing inertial confinement fusion 

分 类 号：TL632[核科学技术—核技术及应用]