Mesogranular structure in a hydrodynamical simulation
Mesogranular structure in a hydrodynamical simulation
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流体动力学模拟中的细观颗粒结构
DOI：
10.1051/0004-6361/201014478
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发表时间：
2010
影响因子：
6.5
通讯作者：
M. Schussler
中科院分区：
文献类型：
--
作者：
L. Matloch;R. Cameron;S. Shelyag;D. Schmitt;M. Schussler
目标。我们分析了太阳表面对流的三维流体动力学模拟中的细颗粒流模式，以确定其特征。方法.我们计算发散图从水平速度获得的局部相关跟踪（LCT）方法。中粒被认为是正速度发散的斑块。我们跟踪的中颗粒，以获得它们的大小和寿命分布。我们改变分析参数，以验证模式是否具有特征尺度。结果所得流型的特征取决于分析中使用的平均时间和长度。结论.我们的结论是，中颗粒图案不表现出内在的长度和时间尺度。
Aims. We analyse mesogranular flow patterns in a three-dimensional hydrodynamical simulation of solar surface convection in order to determine its characteristics. Methods. We calculate divergence maps from horizontal velocities obtained with the local correlation tracking (LCT) method. Mesogranules are identified as patches of positive velocity divergence. We track the mesogranules to obtain their size and lifetime distributions. We vary the analysis parameters to verify if the pattern has characteristic scales. Results. The characteristics of the resulting flow patterns depend on the averaging time and length used in the analysis. Conclusions. We conclude that the mesogranular patterns do not exhibit intrinsic length and time scales.