| Turbulence properties in the solar convection envelope: properties of the overshooting regions | |
Zhang QS(张钱生)1,2 ; Li Y(李焱)1; Zhang, QS (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
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| 发表期刊 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 2009-05 | |
| 卷号 | 9期号:5页码:585-595 |
| DOI | 10.1088/1674-4527/9/5/009 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Convection Turbulence Sun: Helioseismology |
| 摘要 | We apply the turbulent convection model (TCM) to investigate properties of turbulence in the solar convective envelope, especially in overshooting regions. The results show TCM gives negative turbulent heat flux (ur(T')'T') over bar in overshooting regions, which is similar to other nonlocal turbulent convection theories. The turbulent temperature fluctuation (T'T') over bar shows peaks in overshooting regions. Most important, we find that the downward overshooting region below the base of the solar convection zone is a thin cellular layer filled with roll-shaped convective cells. The overshooting length for the temperature gradient is much shorter than that for element mixing because turbulent heat flux of downward and upward moving convective cells counteract each other in this cellular overshooting region. Comparing the models' sound speed with observations, we find that taking the convective overshooting into account helps to improve the sound speed profile of our nonlocal solar models. Comparing the p-mode oscillation frequencies with observations, we validated that increasing the diffusion parameters and decreasing the dissipation parameters of TCM make the p-mode oscillation frequencies of the solar model be in better agreement with observations. |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 1674-4527 |
| URL | 查看原文 |
| 归档日期 | 2009-08-19 |
| WOS记录号 | WOS:000266398200009 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | MODELS ; ZONE ; EQUATION ; STARS ; STATE |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5198 |
| 专题 | 恒星物理研究组 |
| 通讯作者 | Zhang, QS (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Graduate School of the Chinese Academy of Sciences, Beijing 100049, China |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Zhang QS,Li Y,Zhang, QS . Turbulence properties in the solar convection envelope: properties of the overshooting regions[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(5):585-595. |
| APA | Zhang QS,Li Y,&Zhang, QS .(2009).Turbulence properties in the solar convection envelope: properties of the overshooting regions.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(5),585-595. |
| MLA | Zhang QS,et al."Turbulence properties in the solar convection envelope: properties of the overshooting regions".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.5(2009):585-595. |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Turbulence propertie（271KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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