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전해질 용액중에서 자연대류 시작

The Onset of Natural Convection in Electrolyte Solution

김래현 박인준 최창균 이종대

Kim LH Park IJ Choi CK Lee JD

HWAHAK KONGHAK, October 1988, 26(5), 453-459(7), NONE

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Abstract

수평으로 위치한 평면전극 사이에 CuSO₄-H₂SO₄-H₂O의 용액이 있을 때 발생되는 자연대류의 시작에 대하여 고찰하였다. 자연대류의 발생시점은 실험적으로 확산이동시 흐르는 전류량과 자연대류시 전류량을 직접 비교함으로서 얻었다. Nernst 확산층 두께를 기준으로한 임계 Rayleigh수는 1250±100이었다. 본 연구에서 자연대류 발생을 감지한 임계시간은 "전파이론"에 의하여 제시된 임계시간보다 4배 정도 큰 것으로 나타났다.

The onset of natural convection has been investigated in a CuSO₄-H₂SO₄-H₂O solution placed between parallel and horizontal plane electrodes. The onset time was obtained experimentally by directly comparing the current of diffusion control with that of natural convection control. The critical Rayleigh number based on the Nernst diffusion layer thickness was found to be 1250±100. This critical time marking the detection of convection was four times larger than that predicted by the propagation theory.

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