Experimenal Study on Unsteady Double-Diffusive Convection in a Rectangle

J. Ocean Eng. Technol. 1994;8(1):105-113.

사각형 용기내의 비정상 이중확산유동에 관한 실험적 연구

홍남호,김창수,현명택

서귀고등학교 교사,한국전력전남지사,제주대학교 기계공학과

Keywords: Natural Convection, Double-Diffusive Convection, Flow Pattern, Unicell, :Layered Flow, Interface, Buoyancy Ratio

핵심용어: 자연대류, 이중확산유동, 유동형태, 단일셀, 층을 이룬 유동, 인접면, 부력비

Abstract

Double-diffusive convection induced by simultaneously-imposed lateral temperature and concentration gradients in a rectangular enclosure with aspect retio, 2.0 has been studied experimentally for adiabatic and isothermal horizontal boundary conditions. Visual observations show two distinct flow structures depending on the buoyancy ratio. The unicell flow structure is observed for a lower buoyancy ratio while the layered flow structure appears for a higher buoyancy ratio. There exists an unstable flow regime between two buoyancy ratios.