Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Experimental study of natural transition in natural convection boundary layer

자연대류 경계층의 천이특성에 대한 실험적 연구

  • Received : 2022.02.08
  • Accepted : 2022.02.28
  • Published : 2022.03.31
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Abstract

We carried out a laboratory experiment about the thermo-fluidic characteristics of natural convection boundary layer over a vertical heated plate under constant heat flux condition. Particle image velocimetry has been applied to observe the surface convection velocity close to the vertical plate submerged in the water chamber with the condition of Ra = 7 × 109 and Pr = 8.1. The velocity distributions indicate that the distinct stripe-like structures appears in the upstream (earlier transition region) and the distinct negative-positive and Λ(λ)-shaped flow structures in the downstream (mid-transition region). In addition, the temporal variation of spanwise and streamwise velocity is also presented.

Keywords

Acknowledgement

이 논문은 2021년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원(20214000000140, 청정에너지 융합 발전 융합대학원과 2019년도 정부(교육부)의 재원으로 2019(한국연구재단)의 지원을 받아 수행된 연구임(2019R1I1A3A01058576, 공학기술기반의 격리챔버 내 극한압력 생성 및 다물리해석)

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