Instability in heated water-porous system
文献类型：期刊论文
| 作者 | Wang,Shuai3; Ouyang,Zhen3; Yang,Qiang2; Ding ZJ(丁子敬)1,3
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| 刊名 | EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
 |
| 出版日期 | 2025 |
| 卷号 | 109页码:428-439 |
| 关键词 | Penetrative convection Instability Porous medium |
| ISSN号 | 0997-7546 |
| DOI | 10.1016/j.euromechflu.2024.11.003 |
| 通讯作者 | Yang, Qiang(qiang.yang@skla.cardc.cn) ; Ding, Zijing(z.ding@hit.edu.cn) |
| 英文摘要 | This paper investigates the stability in a heated fluid-porous system. Darcy's law is used for the flow in the porous medium. Previous studies indicate that the classical Rayleigh-B & eacute;nard instability in this flow is independent of the mutual positions of the fluid layer and porous layer. This paper demonstrates that the instability depends on the mutual positions of the fluid layer and porous layer when the liquid density is nonlinearly dependent on temperature. When porous medium is located at the bottom of the system, onset of convection may occur in lower porous layer (pure-porous mode), upper water layer (pure-water mode) or across both layers (porous-water mode). However, onset of convection cannot take place only in the upper porous layer when porous medium is placed at the top of the system. The influence of depth ratio J and the density inversion parameter BM on instability of bilayer system are investigated in detail and dependence of critical modes on parameters are summarized in phase diagrams. In addition, direct numerical simulation is used to analyse the instability mechanism and identify subcritical or supercritical instability for bilayer systems. |
| 分类号 | 二类 |
| WOS关键词 | NATURAL-CONVECTION ; FLUID ; ONSET ; MEDIA ; LAYER ; PURE |
| 资助项目 | State Key Laboratory of Aerodynamics, China ; National Natural Science Foundation of China[12102109] ; National Natural Science Foundation of China[52176065] ; National Key R&D Program of China |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001364411900001 |
| 资助机构 | State Key Laboratory of Aerodynamics, China ; National Natural Science Foundation of China ; National Key R&D Program of China |
| 其他责任者 | Yang, Qiang ; Ding, Zijing |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/97591]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.State Key Lab Aerodynam, Mianyang 621000, Sichuan, Peoples R China; 3.Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Wang,Shuai,Ouyang,Zhen,Yang,Qiang,et al. Instability in heated water-porous system[J]. EUROPEAN JOURNAL OF MECHANICS B-FLUIDS,2025,109:428-439. |
| APA | Wang,Shuai,Ouyang,Zhen,Yang,Qiang,&丁子敬.(2025).Instability in heated water-porous system.EUROPEAN JOURNAL OF MECHANICS B-FLUIDS,109,428-439. |
| MLA | Wang,Shuai,et al."Instability in heated water-porous system".EUROPEAN JOURNAL OF MECHANICS B-FLUIDS 109(2025):428-439. |
入库方式： OAI收割
来源：力学研究所
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