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无振荡,无自由参数格式在三维太阳风流动数值模拟中的应用
Alternative TitleAPPLICATIONS OF A NON-OSCILLATORY,NON-FREE PARAMETER SCHEME IN THREE DIMENSIONAL SOLAR WIND FLOW SIMULATIONS
叶占银; 魏奉思; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication空间科学学报
2000
Volume20Issue:3Pages:208-215
ISSN0254-6124
Language中文
Keyword数值模拟 cme事件 三维流动 太阳风 nnd
Abstract从快速,有效地进行空间天气数值预报的需要出发,针对1998年5月份行星际太阳风暴事件,采用全三维流体力学(HD)模型进行数值试验,考察了无振荡,无自由参数(NND)格式在三维太阳风流动数值模拟中的应用.计算中内边界的密度分布由观测K日冕数据来确定,由此得到的源表面密度分布具有和源表面电流片相似的结构.数值试验表明:虽然该格式不需要加入人工粘性,但是具有很好的计算稳定性.在扰动计算时激波间断耗散小.
Other AbstractNon-oscillatory, nor-free parameter scheme is employed to split three-dimensional time-dependent hydrodynamic model for numerical computation. Computatians of background $uid field and disturbance propagatian are carried out for the coronal mass ejection occurring in lflay 1998.A similar density distribution to that of ra-dial magnetic an solar source surface can be determined from the HAO K-corona meter polarization-brightness data, which can be taken as inner boundary density distribution.The propagation of disturbance shows a sharp discontinuity without spurious oscillation and dispersion. Also,the numerical test shows that.the scheme keeps a stable iteration withaut any artificial diffusion being added.an the ather hand,the source code programmed with this hydrodynamic model can be used to madel the specific coronal mass ejection }}hen the configuration of magnetic field is not decisive the solar wind flow.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1442
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
叶占银,魏奉思,北京8701信箱. 无振荡,无自由参数格式在三维太阳风流动数值模拟中的应用[J]. 空间科学学报,2000,20(3):208-215.
APA 叶占银,魏奉思,&北京8701信箱.(2000).无振荡,无自由参数格式在三维太阳风流动数值模拟中的应用.空间科学学报,20(3),208-215.
MLA 叶占银,et al."无振荡,无自由参数格式在三维太阳风流动数值模拟中的应用".空间科学学报 20.3(2000):208-215.
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