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The natural convection in a three dimensional enclosure using color capturing technique and computation
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 Title & Authors
The natural convection in a three dimensional enclosure using color capturing technique and computation
Lee, Gi-Baek; Kim, Tae-Yeong; Yang, Jang-Sik;
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 Abstract
The natural convection of a horizontal layer heated from below in a three-dimensional rectangular enclosure was dealt with both numerically and experimentally. The aspect ratios are 1:2:3.5 and Boussinesq fluid is water with the Prandtl number of 5.0. This experimental study showed how to measure the variation of temperature field in a 3-D rectangular enclosure with small aspect ratios by using TLC(Thermochromic Liquid Crystal) and color capturing technique. The experimental temperature field had periodic characteristics of 75 sec at Ra=2.37*10 . But the numerical convection flow had periodic characteristics of 79 sec at the same Rayleigh number. In three dimensional computation it was found that the convection roll structure bifurcated from four rolls to two rolls as the Rayleigh number is increased.
 Keywords
Color Capturing Technique;Thermochromic Liquid Crystal;Three Dimensional Enclosure;Periodic Convection;
 Language
Korean
 Cited by
1.
원주 후미에 부착된 와동발생기의 영각 변화에 따른 유동 및 열전달 특성,하홍영;홍철현;양장식;이기백;

한국마린엔지니어링학회지, 2002. vol.26. 4, pp.439-449
2.
와동 발생기 높이 변화에 대한 경계층 내의 유동장과 온도장에 관한 실험적 연구,권수인;양장식;이기백;

대한기계학회논문집B, 2002. vol.26. 1, pp.82-93 crossref(new window)
3.
감온액정을 이용한 Rayleigh-Bernard 대류의 정량적 가시화에 관한 연구,배대석;김진만;권오봉;이동형;이연원;김남식;

한국마린엔지니어링학회지, 2003. vol.27. 3, pp.395-404
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