Abstract

The current study is primarily motivated to gain better understanding of the flow pattern, the temperature distribution and concentration distribution caused by the rmosolutal convection in an electrochemical system within a right-upper and left-down inclined enclosures with different aspect ratio partitions partially divided enclosure. The test cell is an inclined rectangular enclosure formed with acrylic and copper plates, which is wrapped with foam insulator to ensure an adiabatic boundary condition, and its aspect ratio is 2.0. The temperature is maintained uniform and controlled by two separated constant temperature baths, which circulate heated or cooled water through the heat exchanger. The working solution used is aqueous copper sulphate. An electrochemical method based on a diffusion-controlled electrode reaction will be employed in this work for creating the concentration gradient. To visualize the flow, the shadowgraph technique is used. To understand the flow structure, the temperature distribution and concentration distribution are investigated.

LITERATURE REVIEW

The discussion of natural convection in a rectangular box, with either numerical analysis or experimental observation methods, is complete. M. El Alami (1) discussed the flow field structure and heat transfer under different heat source spacing. With numerical method, IhsanDagtekin (2) discussed flow line, isotherm, mean Nusselt number, and entropy generation induced by heat transfer under Rayleigh number = 10³~10⁶. Using water as the working fluid, Shohel Mahmud (3) discussed natural convection inthe partitioned enclosed space and pointed out the great effect of opening ratio on heat transfer and flow field patterns. Xuegeng Yang (4) discussed the effect of small aspect ratio by using a 1cm³ enclosed box with 0.1M cupric sulfate aqueous solution and different electrode on the left and right plates to observe the flow field with an optical interferometer. It was discovered that, under different concentration distribution, the intrusion layer presented certain rules. Shohel Mahmud (5) further utilized SIMPLE algorithm and discussed the effects of flow field, temperature field, and interwall spacing under Grashof nu ...