대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제29권11호
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  • Pages.1209-1219
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  • 2005
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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수평 사각밀폐공간내의 전도열전달 기구에서 열모세관효과

The Thermocapillary Effect on Pure Conduction Mechanism in a Closed Square Cavity

  • 유재봉 (안동대학교 대학원 기계공학과) ;
  • 안도원 (안동대학교 대학원 기계공학과) ;
  • 유주식 (안동대학교 기계교육과) ;
  • 엄용균 (안동대학교 기계공학부)
  • 발행 : 2005.11.01
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초록

In a closed square cavity filled with a liquid, a cooling horizontal upper wall and a heating lower wall, the flow isn't generated under the ground-based condition when Rayleigh number is lower than 1700. In this mechanism, Ra=1534, Temperature and velocity fields near an air-bubble in silicon-oil under a cooled upper wall were investigated. Temperature and velocity fields is visualized using the thermo-sensitive liquid-crystal and light sheet visualization technique. The quantitative analysis fer the temperature and the flow fields were carried out by applying the image processing technique to the original data. The symmetry shape of two vortexes near an air bubble was observed. As the bubble size increased, the size of vortex and the magnitude of velocity increased. In spite of elapsed time, a pair of vortexes was the unique and steady-state flow in a square cavity and wasn't induced to the other flow in the surround region.

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참고문헌

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