| Continuum perspective of bulk viscosity in compressible fluids |
| Li XD; Hu ZM(胡宗民) ; Jiang ZL(姜宗林); Hu, ZM (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
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| 发表期刊 | JOURNAL OF FLUID MECHANICS
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| 2017
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| 卷号 | 812页码:966-990 |
| ISSN | 0022-1120
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| 摘要 | Kinetic theory and acoustic measurements have proven that the hulk viscosity associated with the expansion or compression effect cannot be ignored in compressible fluids except for monatomic gases. A new theoretical formula for the bulk viscosity coefficient (BVC) is derived by the continuum medium methodology, which provides a further understanding of the bulk viscosity, i.e. zeta is equal to the product of the hulk modulus K and the relaxation time tau (zeta = K tau). The continuum and kinetic theories present consistent results from macro- and microperspectives respectively, only differing in terms of a coefficient. The theoretical predictions of the BVC in diatomic molecules, such as N-2, O-2 and CO, show good agreement with the experimental data over a wide range of temperature. In addition, the vibrational contributions to are controlled by a rapid exponential decrease at high temperatures, while at low temperatures a slow linear increase proceeds for the rotational cases. The relaxation time tau, collision number Z, BVC zeta and ratio of bulk-to-shear viscosities zeta/mu in the vibrational mode are found to be several orders of magnitude larger than those in the rotational mode. |
| DOI | 10.1017/jfm.2016.834
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| URL | 查看原文
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| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000392712400043
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| 关键词[WOS] | compressible flows
; gas dynamics
; Navier-Stokes equations
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| WOS研究方向 | Mechanics
; Physics
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| WOS类目 | Mechanics
; Physics, Fluids & Plasmas
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| 项目资助者 | This work is supported by the National Natural Foundation of China under grant nos 11532014 and 11672308.
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| 课题组名称 | LHD激波与爆轰物理
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| 论文分区 | 一类
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| 力学所作者排名 | 1
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/60103
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| 专题 | 高温气体动力学国家重点实验室
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| 通讯作者 | Hu, ZM (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China. |
推荐引用方式
GB/T 7714 |
Li XD,Hu ZM,Jiang ZL,et al. Continuum perspective of bulk viscosity in compressible fluids[J]. JOURNAL OF FLUID MECHANICS,2017,812:966-990.
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| APA |
Li XD,胡宗民,姜宗林,&Hu, ZM .(2017).Continuum perspective of bulk viscosity in compressible fluids.JOURNAL OF FLUID MECHANICS,812,966-990.
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| MLA |
Li XD,et al."Continuum perspective of bulk viscosity in compressible fluids".JOURNAL OF FLUID MECHANICS 812(2017):966-990.
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