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J. Ocean Eng. Technol. 1999;13(1):121-129.    

A Study on Buoyancy Effects in Double-Diffusive Convecting System
Kim, Yang-Hun;Hyun, Myung-Taek;Kim, Min-Chan;
이중확산대류계에서의 부력효과에 관한 연구(Ⅰ)- 실험적 연구 -
김양훈;현명택;김민찬;
제주대학교 대학원 기계공학과;제주대학교 기계공학과;제주대학교 화학공학과;
© 1999 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Keywords: Double-Diffusive Convecting System, Electrolysis, Anode, Cathod, Limiting Current, Diffusion, Convection
핵심용어: 이중확산대류계, 전기분해, 양극, 음극, 한계전류, 확산, 대류
Abstract
Double-diffusive convection with verical temperature and concentration gradients in thermally stratified fluids has been investigated experimentally using an electrochemical technique. Cupric sulfuric-sulffuric acid solution confined between two horizontal copper electrodes was used. The change of thermal and solutal buoyance has no influence on the range of voltage for the limiting current. Due to Soret effect, the onset time of natural convection is delayed as the stabilizing thermal buoyancy decreases. Also it is found that the shrinkage of the unstabilizing solutal buoyancy makes the onset of natural convection retard. Multi-layered convective phenomena do not appear because cupric sulfate-sulfuric acid solution is thermally stratified, and heat diffuses faster than cupric sulfate solfate solution.


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