Low Mach Number Modeling of Type Ia Supernovae. III. Reactions
Low Mach Number Modeling of Type Ia Supernovae. III. Reactions
复制标题
Ia 型超新星的低马赫数建模。
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
M. Zingale
中科院分区：
文献类型：
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作者：
A. Almgren;John B. Bell;A. Nonaka;M. Zingale
我们继续描述低马赫数流体动力学算法的反应，全星星流。在这里，我们演示了如何准确地将反应使用二阶精确的Strang-splitting技术。我们还提高了模型的保真度，通过允许基态演变响应大规模对流以及大规模加热，注意考虑到成分的变化，以及基态。新的算法进行了测试，通过与完全可压缩的代码比较，并显示出良好的协议。由此产生的代码，MAESTRO，一旦扩展到包含一个球对称的基态，将被用来研究Ia型超新星的对流和点火阶段。
We continue the description of a low Mach number hydrodynamics algorithm for reacting, full star flows. Here we demonstrate how to accurately incorporate reactions using a second-order accurate Strang-splitting technique. We also improve the fidelity of the model by allowing the base state to evolve in response to large-scale convection as well as large-scale heating, taking care to account for the compositional changes to the base state as well. The new algorithm is tested via comparisons with a fully compressible code and shown to be in good agreement. The resulting code, MAESTRO, once extended to incorporate a spherically symmetric base state, will be used to study the convection and ignition phases of Type Ia supernovae.