NUMERICAL ANALYSIS OF OSCILLATORY INSTABILITY OF BUOYANCY CONVECTION WITH THE GALERKIN SPECTRAL METHOD

Autor:	I. Tanasawa, A. Yu. Gelfgat
Rok vydání:	1994
Předmět:	Convection Physics Numerical Analysis Natural convection Buoyancy Thermodynamics Mechanics engineering.material Condensed Matter Physics Instability Physics::Fluid Dynamics Stream function Fluid dynamics engineering Spectral method Galerkin method
Zdroj:	Numerical Heat Transfer, Part A: Applications. 25:627-648
ISSN:	1521-0634 1040-7782
DOI:	10.1080/10407789408955970
Popis:	The Galerkin spectral method with basis Junctions previously introduced by Gelfgat 111 is applied for analysis of oscillatory instability of convective flows in laterally heated rectangular cavities. Convection of water and air in a square cavity, and convection of a tow-Prandtl-number fluid in a square cavity, and a cavity with a ratio length / height of 4 are considered. Patterns of the most unstable perturbations of the stream function and the temperature are presented, and mechanisms of oscillatory instability are discussed. Comparison with other numerical investigations shows that the Galerkin method with divergent-free basis functions, which satisfy all the boundary conditions, needs fewer modes than other methods using discretization of the flow region.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cbebd7996cd55012de0ff73286c0d86d https://doi.org/10.1080/10407789408955970 Zobrazit plný text záznamu