Anisotropy and dissipation of turbulence and their effects on solar models

	Anisotropy and dissipation of turbulence and their effects on solar models
	Li Y(李焱); Yang JY(杨家艳)
刊名	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2001-02
卷号	1 期号:1 页码:66-76
关键词	Sun : interior turbulent convection Sun : oscillations
ISSN号	1009-9271
通讯作者	Li, Y (reprint author), Yunnan Astron Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	Based on a dynamic model for turbulent convection, we investigate the effects of dissipation and anisotropy of the turbulence on the convective energy transport. We introduce two time scales to describe the dissipation of the turbulence, and approximate the anisotropy of the turbulence by Rotta's proposal of "return to isotropy". The improved turbulence model results in an equation to determine the temperature gradient in the convection zone, which is of similar form as that of the MIT. We apply the improved MIT to solar models, and find that the increases of the anisotropy and decreases of the dissipation of the turbulence reduce the value of the convection parameter a, because these processes enhance the convective energy transfer rate. Compared with the observed solar p-mode frequencies, it is plausible that the dissipation of the turbulence in the solar convection zone should be fairly strong, while the degree of anisotropy of the turbulence plays a less significant role on the structure of the solar convection zone.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
分类号	P182
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	REYNOLDS STRESS APPROACH ; CONVECTION ; STARS ; OSCILLATIONS ; OPACITIES ; SHEAR
收录类别	SCI
原文出处	http://iopscience.iop.org/1009-9271/1/1/66/
语种	英语
WOS记录号	WOS:000172248600009
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5154]
专题	云南天文台_恒星物理研究组
作者单位	Yunnan Astronomical Observatory and NAOCAS, P.O. Box 110, Kunming 650011
推荐引用方式 GB/T 7714	Li Y,Yang JY. Anisotropy and dissipation of turbulence and their effects on solar models[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2001,1(1):66-76.
APA	Li Y,&Yang JY.(2001).Anisotropy and dissipation of turbulence and their effects on solar models.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,1(1),66-76.
MLA	Li Y,et al."Anisotropy and dissipation of turbulence and their effects on solar models".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 1.1(2001):66-76.