대한공업교육학회지

  • 제30권2호
  • /
  • Pages.123-129
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  • 2005
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  • 1225-4789(pISSN)
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  • 2671-6003(eISSN)
대한공업교육학회 (Korean Institute of Industrial Educations)
권호 표지

불균일 벽면 온도를 갖는 Rayleigh-Benard 문제에서의 유동의 다수성

Multiplicity of Flows in a Rayleigh-Benard Problem with Non-Uniform Wall Temperatures

  • 유주식 (안동대학교, 기계교육과) ;
  • 김용진 (한국기계연구원, 열유체환경연구부)
  • 투고 : 2005.10.30
  • 심사 : 2005.12.26
  • 발행 : 2005.09.30
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초록

A Rayleigh-Benard problem with non-uniform wall temperatures of the form, $T_L=T_1+{\delta}{\Delta}T{\sin}kx$ and $T_U=T_2-{\delta}{\Delta}{\sin (kx)$, is numerically investigated. In the conduction-dominated regime with small a Rayleigh number, a two-tier structure appears with two counter-rotating rolls stacked on the top of each other. The flow becomes unstable with increase of the Rayleigh number, and multicellular convection occurs above a critical Rayleigh number. The multicellular flows at high Rayleigh numbers consist of approximetely square-shape cells. Four multiple flows and dual flows classified by the number of cells are found at k=0.5 and k=1, respectively.

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참고문헌

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