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可压缩流体体积黏性的连续介质理论
Alternative TitleThe continuum theory of bulk viscosity in compressible fluids
李馨东; 胡宗民; 姜宗林
Source Publication中国科学. 物理学, 力学, 天文学
2016
Volume46Issue:3
ISSN1674-7275
Abstract本文从连续介质假设的角度出发, 推导出了不同于分子运动论的体积黏性系数公式. 新理论首次从宏观上揭示了可压缩流体体积黏性的具体物理涵义, 即体积黏性系数是体积模量与弛豫时间的乘积. 以氮气为例,分别对转动模态和振动模态下的体积黏性进行了计算和分析, 结果表明: 连续介质理论的结果略高于分子运动论的结果, 但二者的预测趋势相同; 在振动激发态下, 弛豫时间、分子碰撞数和体积黏性要比转动激发态下的高出几个数量级.
Other AbstractA new theoretical formula of bulk viscosity in compressible fluids is derived by the continuum medium assumption, which first indicates a macroscopic physical interpretation that the bulk viscosity coefficient is equal to the product of bulk modulus and relaxation time. For nitrogen in the rotational and vibrational energy modes, the bulk viscosity of the present continuum theory shows slightly higher results than that of the kinetic theory, but the theories provide a same predicted trend. In the vibrational relaxation process, the relaxation time, collision number and the bulk viscosity coefficient are several orders of magnitude larger than that in the rotational mode.
KeywordCompressible Fluids Stokes Assumption Bulk Viscosity Relaxation Time Rotational Mode Vibrational Mode
Indexed ByCSCD
Language中文
WOS Keywordcompressible fluids ; Stokes assumption ; bulk viscosity ; relaxation time ; rotational mode ; vibrational mode
Funding Organization国家自然科学基金资助项目
CSCD IDCSCD:5643647
DepartmentLHD激波与爆轰物理
Classification二类
RankingTrue
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59832
Collection高温气体动力学国家重点实验室
Recommended Citation
GB/T 7714
李馨东,胡宗民,姜宗林. 可压缩流体体积黏性的连续介质理论[J]. 中国科学. 物理学, 力学, 天文学,2016,46(3).
APA 李馨东,胡宗民,&姜宗林.(2016).可压缩流体体积黏性的连续介质理论.中国科学. 物理学, 力学, 天文学,46(3).
MLA 李馨东,et al."可压缩流体体积黏性的连续介质理论".中国科学. 物理学, 力学, 天文学 46.3(2016).
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