ALE-AMR: A New 3D Multi-Physics Code for Modeling Laser/Target Effects
ALE-AMR: A New 3D Multi-Physics Code for Modeling Laser/Target Effects
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ALE-AMR：用于建模激光/目标效应的新 3D 多物理场代码
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
A. Geille
中科院分区：
文献类型：
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作者：
A. Koniges;N. Masters;A. Fisher;R. Anderson;D. Eder;T. Kaiser;D. Bailey;B. Gunney;P. Wang;B. Brown;K. Fisher;F. Hansen;B. Maddox;D. Benson;M. Meyers;A. Geille
我们已经开发了一个新的三维多物理多材料的代码，ALE- AMR，模拟激光/目标的影响，包括碎片/弹片的产生。该代码结合了任意拉格朗日欧拉（ALE）流体动力学与自适应网格细化（AMR）连接连续的微观结构制度。该代码是独一无二的，它能够模拟热辐射等离子体和冷碎片固体。新的数值技术开发了许多物理软件包的工作效率的动态移动和适应网格。灵活的强度/失效框架允许可插拔材料模型。材料历史阵列用于存储材料模型所需的持久数据，例如累积损伤水平或J2塑性模型中的屈服应力。我们为韧性金属以及脆性材料（如Si、Be和B4 C）建模。我们使用界面重建的基础上的混合区域内的材料组分的体积分数和重建接口的需要。该界面重构模型也可用于空洞的合并和破碎。AMR框架允许分层材料建模（HMM），其中不同的材料模型处于不同的细化级别。激光射线通过由建模空间的最高分辨率表示组成的虚拟复合网格传播。一个新的二阶精度的扩散求解器已实现的热传导和辐射传输包。在美国和法国，使用激光和X射线驱动的层裂实验的代码进行验证。我们提出了一个概述的代码和仿真结果。
We have developed a new 3D multi-physics multi-material code, ALE- AMR, for modeling laser/target effects including debris/shrapnel generation. The code combines Arbitrary Lagrangian Eulerian (ALE) hydrodynamics with Adaptive Mesh Refinement (AMR) to connect the continuum to microstructural regimes. The code is unique in its ability to model hot radiating plasmas and cold fragmenting solids. New numerical techniques were developed for many of the physics packages to work efficiency on a dynamically moving and adapting mesh. A flexible strength/failure framework allows for pluggable material models. Material history arrays are used to store persistent data required by the material models, for instance, the level of accumulated damage or the evolving yield stress in J2 plasticity models. We model ductile metals as well as brittle materials such as Si, Be, and B4C. We use interface reconstruction based on volume fractions of the material components within mixed zones and reconstruct interfaces as needed. This interface reconstruction model is also used for void coalescence and fragmentation. The AMR framework allows for hierarchical material modeling (HMM) with different material models at different levels of refinement. Laser rays are propagated through a virtual composite mesh consisting of the finest resolution representation of the modeled space. A new 2 nd order accurate diffusion solver has been implemented for the thermal conduction and radiation transport packages. The code is validated using laser and x-ray driven spall experiments in the US and France. We present an overview of the code and simulation results.