Efficient turbulent compressible convection in the deep stellar atmosphere

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	Efficient turbulent compressible convection in the deep stellar atmosphere
	Tian, Chun-Lin 1,2; Deng, Li-Cai 1; Chan, Kwing-Lam 3; Xiong, Da-Run4
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2009
卷号	9 期号:1 页码:102-114
关键词	convection hydrodynamic turbulence method: numerical stars: atmosphere
ISSN号	1674-4527
英文摘要	We report on an application of gas-kinetic BGK scheme to the computation of turbulent compressible convection in the stellar interior. After incorporating the Sub-grid Scale (SGS) turbulence model into the BGK scheme, we tested the effects of numerical parameters on the quantitative relationships among the thermodynamic variables, their fluctuations and correlations in a very deep, initially gravity-stratified stellar atmosphere. Comparison indicates that the thermal properties and dynamic properties are dominated by different aspects of numerical models separately. An adjustable Deardorff constant in the SGS model c(mu) = 0.25 and an amplitude of artificial viscosity in the gas-kinetic BGK scheme C(2) = 0 are appropriate for the current study. We also calculated the density-weighted auto- and cross-correlation functions in Xiong's turbulent stellar convection theory based on which the gradient type of models of the non-local transport and the anisotropy of the turbulence were preliminarily studied. No universal relations or constant parameters were found for these models.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	NAVIER-STOKES EQUATIONS ; HYDRODYNAMIC CONVECTION ; EVOLUTION ; SIMULATIONS ; DIFFUSION ; SCHEME ; STARS ; SUN
收录类别	SCI
语种	英语
WOS记录号	WOS:000264770600009
公开日期	2015-04-20
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/11213]
专题	紫金山天文台_院士文集_熊大闰
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Hong Kong Univ Sci & Technol, Dept Math, Hong Kong, Hong Kong, Peoples R China 4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Tian, Chun-Lin,Deng, Li-Cai,Chan, Kwing-Lam,et al. Efficient turbulent compressible convection in the deep stellar atmosphere[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(1):102-114.
APA	Tian, Chun-Lin,Deng, Li-Cai,Chan, Kwing-Lam,&Xiong, Da-Run.(2009).Efficient turbulent compressible convection in the deep stellar atmosphere.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(1),102-114.
MLA	Tian, Chun-Lin,et al."Efficient turbulent compressible convection in the deep stellar atmosphere".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.1(2009):102-114.