Journal of Advanced Marine Engineering and Technology

  • 제33권7호
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  • Pages.987-993
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  • 2009
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  • 2234-7925(pISSN)
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  • 2234-8352(eISSN)
한국마린엔지니어링학회 (The Korean Society of Marine Engineering)
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An Experimental Investigation of Unsteady Mixed Convection in a Horizontal Channel with Cavity Using Thermo-Sensitive Liquid Crystals

  • Bae, Dae-Seok (School of Mechanical Engineering, Pukyeong National University) ;
  • Cai, Long-Ji (School of Mechanical Engineering, Pukyeong National University) ;
  • Kim, Eun-Pil (School of Mechanical Engineering, Pukyeong National University)
  • 발행 : 2009.11.30
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초록

An experimental study is performed to investigate unsteady mixed convection in a horizontal channel with a heat source. Particle image velocimetry (PIV) with thermo-sensitive liquid crystal (TLC) tracers is used for visualization and analysis. This method allows simultaneous measurement of velocity and temperature fields at a given instant of time. Quantitative data of the temperature and velocity are obtained by applying the color-image processing to a visualized image, and neural network is applied to the color-to-temperature calibration. It is found that the periodic flow of mixed convection in a cavity appears at very low Reynolds numbers (Re<0.4), and the period decreases with increasing Reynolds numbers and increases with increasing aspect ratio.

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참고문헌

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피인용 문헌

  1. Characteristics of Flow Field around Baffle Located Sudden Expansion and Contraction Open Channel using PIV Measurements vol.35, pp.4, 2011, https://doi.org/10.5916/jkosme.2011.35.4.468
  2. 액정을 이용한 3차원 사각채널 내 혼합대류의 정량적 가시화 vol.20, pp.6, 2009, https://doi.org/10.9726/kspse.2016.20.6.051