Complex Transition of Double-Diffusive Convection in a Rectangular Enclosure with Height-to-Length Ratio Equal to 4: Part I | |
Liang X(梁贤); Li XL(李新亮); Fu DX(傅德薰); Ma YW(马延文) | |
Source Publication | Communications in Computational Physics |
2009 | |
Volume | 6Issue:2Pages:247-268 |
ISSN | 1815-2406 |
Abstract | This is the first part of direct numerical simulation (DNS) of double-diffusive convection in a slim rectangular enclosure with horizontal temperature and concentration gradients. We consider the case with the thermal Rayleigh number of 10^5, the Pradtle number of 1, the Lewis number of 2, the buoyancy ratio of composition to temperature being in the range of [0,1], and height-to-width aspect ration of 4. A new 7th order upwind compact scheme was developed for approximation of convective terms, and a three-stage third-order Runge-Kutta method was employed for time advancement. Our DNS suggests that with the buoyancy ratio increasing form 0 to 1, the flow of transition is a complex series changing fromthe steady to periodic, chaotic, periodic, quasi-periodic, and finally back to periodic. There are two types of periodic flow, one is simple periodic flow with single fundamental frequency (FF), and another is complex periodic flow with multiple FFs. This process is illustrated by using time-velocity histories, Fourier frequency spectrum analysis and the phase-space rajectories. |
Subject Area | 流体力学 |
Indexed By | SCI |
Language | 英语 |
WOS ID | WOS:000267111200002 |
WOS Keyword | NAVIER-STOKES EQUATIONS ; FINITE-DIFFERENCE SCHEMES ; THERMOSOLUTAL CONVECTION ; CONCENTRATION GRADIENTS ; HORIZONTAL TEMPERATURE ; MULTIPLE EQUILIBRIA ; SQUARE CAVITY ; FLOW ; FIELDS ; REGIME |
WOS Research Area | Physics |
WOS Subject | Physics, Mathematical |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://dspace.imech.ac.cn/handle/311007/28799 |
Collection | 高温气体动力学国家重点实验室 |
Corresponding Author | Liang X(梁贤) |
Recommended Citation GB/T 7714 | Liang X,Li XL,Fu DX,et al. Complex Transition of Double-Diffusive Convection in a Rectangular Enclosure with Height-to-Length Ratio Equal to 4: Part I[J]. Communications in Computational Physics,2009,6,2,:247-268. |
APA | 梁贤,李新亮,傅德薰,&马延文.(2009).Complex Transition of Double-Diffusive Convection in a Rectangular Enclosure with Height-to-Length Ratio Equal to 4: Part I.Communications in Computational Physics,6(2),247-268. |
MLA | 梁贤,et al."Complex Transition of Double-Diffusive Convection in a Rectangular Enclosure with Height-to-Length Ratio Equal to 4: Part I".Communications in Computational Physics 6.2(2009):247-268. |
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