A unified mechanism for unconfined deflagration-to-detonation transition in terrestrial chemical systems and type Ia supernovae

doi:10.1126/science.aau7365

GSTDTAP

DOI	10.1126/science.aau7365
	A unified mechanism for unconfined deflagration-to-detonation transition in terrestrial chemical systems and type Ia supernovae
	Poludnenko, Alexei Y.1,2; Chambers, Jessica 3; Ahmed, Kareem 3; Gamezo, Vadim N.4; Taylor, Brian D.5
	2019-11-01
发表期刊	SCIENCE
ISSN	0036-8075
EISSN	1095-9203
出版年	2019
卷号	366 期号:6465 页码:588-+
文章类型	Article
语种	英语
国家	USA
英文摘要	The nature of type Ia supernovae (SNIa)-thermonuclear explosions of white dwarf stars-is an open question in astrophysics. Virtually all existing theoretical models of normal, bright SNIa require the explosion to produce a detonation in order to consume all of stellar material, but the mechanism for the deflagration-to-detonation transition (DDT) remains unclear. We present a unified theory of turbulence-induced DDT that describes the mechanism and conditions for initiating detonation both in unconfined chemical and thermonuclear explosions. The model is validated by using experiments with chemical flames and numerical simulations of thermonuclear flames. We use the developed theory to determine criteria for detonation initiation in the single-degenerate Chandrasekhar-mass SNIa model and show that DDT is almost inevitable at densities of 10(7) to 10(8) grams per cubic centimeter.
领域	地球科学 ; 气候变化 ; 资源环境
收录类别	SCI-E
WOS记录号	WOS:000494465700039
WOS关键词	DIRECT NUMERICAL SIMULATIONS ; LIGHT-CURVE SHAPES ; WHITE-DWARFS ; MODELS ; FLAMES ; EXPLOSION ; NUCLEOSYNTHESIS ; TURBULENCE ; DISTANCES ; COMPANION
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/226124
专题	环境与发展全球科技态势
作者单位	1.Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA; 2.Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA; 3.Univ Cent Florida, Dept Mech & Aerosp Engn, Orlando, FL 32816 USA; 4.Naval Res Lab, Labs Computat Phys & Fluid Dynam, Washington, DC 20375 USA; 5.Air Force Res Lab, Munit Directorate, Eglin, FL 32542 USA
推荐引用方式 GB/T 7714	Poludnenko, Alexei Y.,Chambers, Jessica,Ahmed, Kareem,et al. A unified mechanism for unconfined deflagration-to-detonation transition in terrestrial chemical systems and type Ia supernovae[J]. SCIENCE,2019,366(6465):588-+.
APA	Poludnenko, Alexei Y.,Chambers, Jessica,Ahmed, Kareem,Gamezo, Vadim N.,&Taylor, Brian D..(2019).A unified mechanism for unconfined deflagration-to-detonation transition in terrestrial chemical systems and type Ia supernovae.SCIENCE,366(6465),588-+.
MLA	Poludnenko, Alexei Y.,et al."A unified mechanism for unconfined deflagration-to-detonation transition in terrestrial chemical systems and type Ia supernovae".SCIENCE 366.6465(2019):588-+.