A Numerical Study of Double-Diffusive Natural Convection in a Rectangular Enclosure Filled with Binary Gas

Autor:	Tatsuo Nishimura, Mikio Wakamatsu, Tsutomu Imoto
Rok vydání:	1996
Předmět:	Natural convection Materials science Buoyancy Mechanical Engineering Enclosure Thermodynamics Laminar flow Mechanics engineering.material Condensed Matter Physics Physics::Fluid Dynamics Hysteresis Flow (mathematics) engineering Initial value problem Constant (mathematics)
Zdroj:	TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B. 62:271-277
ISSN:	1884-8346 0387-5016
DOI:	10.1299/kikaib.62.271
Popis:	In this paper we numerically examine steady laminar double-diffusive natural convection in a rectangular enclosure filled with binary gas due to the combined horizontal temperature and concentration gradients for opposing flow. Two kinds of enclosures are used (A=1 and 0.5). In particular, the buoyancy ratio is varied, and all other parameters are held constant (Pr=1, RaT=105 and Le=2). The numerical solution is found to depend on the initial condition in the transition from a thermal-dominated flow to a compositional-dominated flow and vice versa. That is, flow hysteresis effects are observed and two distinct solutions are presented for a given buoyancy ratio.
Databáze:	OpenAIRE
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