Sound wave propagation in rarefied molecular gases
文献类型：期刊论文
| 作者 | Li, Shaokang; Su, Wei; Zhang YH(张勇豪) |
| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2023-10-20 |
| 卷号 | 973页码:A35 |
| 关键词 | kinetic theory |
| ISSN号 | 0022-1120 |
| DOI | 10.1017/jfm.2023.698 |
| 英文摘要 | Sound wave propagation in rarefied flows of molecular gases confined in micro-channels is investigated numerically. We first validate the employed kinetic model against the experimental results and then systematically study the gas damping and surface force on the transducer as well as the resonance/anti-resonance in confined space. To quantify the impact of the finite relaxation rates of the translational and internal energies on wave propagation, we examine the roles of bulk viscosity and thermal conductivity in depth over a wide range of rarefactions and oscillation frequencies. It is found that the bulk viscosity only exerts influence on the pressure amplitude and its resonance frequency in the slip regime in high oscillations. In addition, the internal degree of freedom is frozen when the bulk viscosity of a molecular gas is large, resulting in the pressure amplitude of sound waves in the molecular gas being the same as in a monatomic gas. Meanwhile, the thermal conductivity has a limited influence on the pressure amplitude in all the simulated flows. In the case of the thermoacoustic wave, we prove that the Onsager-Casimir reciprocal relation also holds for molecular gases, i.e. the pressure deviation induced by the temperature variation is equal to the heat flux induced by the plate oscillation. Our findings enable an enhanced understanding of sound wave propagation in molecular gases, which may facilitate the design of nano-/micro-scale devices. |
| 分类号 | 一类/力学重要期刊 |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001085640400001 |
| 资助机构 | The authors would like to thank L. Gibelli and B. Shan of Edinburgh University, Scotland, and L. Wu of Southern University of Science and Technology, China, for helpful discussions. |
| 其他责任者 | Zhang, YH (corresponding author), Chinese Acad Sci, Inst Mech, Ctr Interdisciplinary Res Fluids, Beijing 100190, Peoples R China. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/95119]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, Shaokang,Su, Wei,Zhang YH. Sound wave propagation in rarefied molecular gases[J]. JOURNAL OF FLUID MECHANICS,2023,973:A35. |
| APA | Li, Shaokang,Su, Wei,&张勇豪.(2023).Sound wave propagation in rarefied molecular gases.JOURNAL OF FLUID MECHANICS,973,A35. |
| MLA | Li, Shaokang,et al."Sound wave propagation in rarefied molecular gases".JOURNAL OF FLUID MECHANICS 973(2023):A35. |
入库方式： OAI收割
来源：力学研究所
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