CAJ | 학술논문

利用一维辐射流体力学数值模拟程序对激光驱动的冲击波在平面铝靶中传播的实验结果进行了模拟研究.分析了空间单元层的厚度对模拟结果的影响,给出了最佳单元层厚度.通过将数值模拟与实验结果相比较给出了实验中两种激光光强的实际的吸收系数.结果显示，波长为1.053μm, 强度分别为0.81×1014和1.65×1014W/cm2的激光驱动的冲击波在铝靶中传播速度分别为16.52，18.56μm/ns,冲击波的峰值压力分别为0.386和0.537?TPa, 这些模拟结果与实验结果是一致的.
이용일유복사류체역학수치모의정서대격광구동적충격파재평면려파중전파적실험결과진행료모의연구.분석료공간단원층적후도대모의결과적영향,급출료최가단원층후도.통과장수치모의여실험결과상비교급출료실험중량충격광광강적실제적흡수계수.결과현시，파장위1.053μm, 강도분별위0.81×1014화1.65×1014W/cm2적격광구동적충격파재려파중전파속도분별위16.52，18.56μm/ns,충격파적봉치압력분별위0.386화0.537?TPa, 저사모의결과여실험결과시일치적.
The numerical simulation study of an experimental result of laser-driven shock wave propagation in a planar aluminum foil target is performed using a one-dimensional radiation hydrodynamic code MULTI. The effect of spatial mesh size on numerical simulation resulits is found to be significant and optimum mesh size is obtained. Series of simulations are performed using different sets of laser absorption coefficients and the most appropriate laser absorption coefficients value for two laser intensity values used in the experiment is obtained .The results suggest that shock velocities and peak shock pressures are in good agreement with the experimental results.