Simulation of the Paraxial Laser Propagation Coupled with Hydrodynamics in 3D Geometry
Simulation of the Paraxial Laser Propagation Coupled with Hydrodynamics in 3D Geometry
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DOI：
10.1007/s10915-007-9135-y
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发表时间：
2007-10
影响因子：
2.5
通讯作者：
P. Ballereau;M. Casanova;F. Duboc;D. Dureau;H. Jourdren;P. Loiseau;J. Métral;O. Morice;R. Sentis
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文献类型：
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作者：
P. Ballereau;M. Casanova;F. Duboc;D. Dureau;H. Jourdren;P. Loiseau;J. Métral;O. Morice;R. Sentis
本文讨论了惯性约束聚变实验装置中产生的等离子体中某些现象的数值模拟问题。该模型包括一个可压缩流体动力学系统耦合的傍轴方程模拟激光传输。对于流体动力学系统，采用拉格朗日-欧拉型数值方法。对于傍轴方程，一个时间隐式离散解决，保持激光能量平衡，该方法是基于分裂的传播项和衍射项根据传播空间变量。我们给出了该方法在并行平台HERA上的三维实现的一些功能。结果显示的数值方案的准确性，我们也给出了相应的现实模拟的情况下，与网格包含高达500万个细胞的数值结果。
We address here numerical simulation problems for modeling some phenomena arising in plasmas produced in experimental devices forInertial Confinement Fusion. The model consists of a compressible fluid dynamics system coupled with a paraxial equation for modeling the laser propagation. For the fluid dynamics system, a numerical method of Lagrange–Euler type is used. For the paraxial equation, a time implicit discretization is settled which preserves the laser energy balance; the method is based on a splitting of the propagation term and the diffraction terms according to the propagation spatial variable. We give some features on the 3D implementation of the method in the parallel platform HERA. Results showing the accuracy of the numerical scheme are presented and we give also numerical results related to cases corresponding to realistic simulations, with a mesh containing up to 500 millions of cells.