Instability in heated water-porous system

doi:10.1016/j.euromechflu.2024.11.003

IMECH-IR > 微重力重点实验室

	Instability in heated water-porous system
	Wang,Shuai 1; Ouyang,Zhen 1; Yang,Qiang 2; Ding ZJ(丁子敬)1,3
通讯作者	Yang, Qiang([email protected]) ; Ding, Zijing([email protected])
发表期刊	EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
	2025
卷号	109 页码:428-439
ISSN	0997-7546
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.
关键词	Penetrative convection Instability Porous medium
DOI	10.1016/j.euromechflu.2024.11.003
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001364411900001
关键词[WOS]	NATURAL-CONVECTION ; FLUID ; ONSET ; MEDIA ; LAYER ; PURE
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
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
项目资助者	State Key Laboratory of Aerodynamics, China ; National Natural Science Foundation of China ; National Key R&D Program of China
论文分区	二类
力学所作者排名	1
RpAuthor	Yang, Qiang ; Ding, Zijing
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/97592
专题	微重力重点实验室
作者单位	1.Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China; 2.State Key Lab Aerodynam, Mianyang 621000, Sichuan, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Beijing 100190, 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.Rp_Au:Yang, Qiang, Ding, Zijing
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.