Numerical 3-D Study of Poiseuille Rayleigh Benard Soret Problem in a Finite Extent Paralellipipedic Duct

Autor:	T. Langlet, H. Ben Hamed, H. Samouda, Rachid Bennacer, Hassen Beji
Rok vydání:	2009
Předmět:	Convection Physics Numerical Analysis Rotational symmetry Thermodynamics Mechanics Condensed Matter Physics Hagen–Poiseuille equation Physics::Fluid Dynamics Transverse plane Convective instability Combined forced and natural convection Duct (flow) Bifurcation
Zdroj:	Numerical Heat Transfer, Part A: Applications. 55:534-552
ISSN:	1521-0634 1040-7782
DOI:	10.1080/10407780902815997
Popis:	This article deals with mixed convection of a binary mixture within a rectangular duct heated from below and under Soret influence. Going forward, the problem is referred to as the Poiseuille Rayleigh Benard Soret (PRBS) problem. We study the pattern formation of a binary mixture heated from below in the presence of a horizontal flow. When the system exhibits a supercritical bifurcation, either 2-D or 3-D convective structures appear. In a layer of infinite extent the presence of through-flow breaks the rotational symmetry, and the system at the convective threshold has to decide between longitudinal and transverse rolls among several unstable modes; we focus attention on transverse rolls. These rolls are generally unsteady and form traveling waves along the duct, and the presence of through-flow reduces the size of the region of convective instability. We show that the spanwise Ay aspect ratio has a strong influence on the threshold of convection, and in binary mixtures with a negative separation ratio N...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ba812ee798faa7a65c3761d17a405908 https://doi.org/10.1080/10407780902815997 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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