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

The Korean Society of Mechanical Engineers (대한기계학회)
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Numerical Study on Natural Convectionin a Doubly-Inclined Cubical-Cavity

이중으로 경사진 3차원 캐비티내 자연대류 열전달현상에 관한 수치해석적 연구

  • 명현국 (국민대학교 기계자동차공학부)
  • Published : 2007.12.01
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Abstract

Natural convection flows in a doubly-inclined cubical air-filled cavity are numerically simulated by a solution code(PowerCFD) using unstructured cell-centered method. For a physical realizability, the cavity has one pair of opposing isothermal faces at different temperatures, $T_h\;and\;T_c$, respectively, the remaining four faces having a linear variation from $T_c\;to\;T_h$. The paper redefines a new doubly-inclined orientation for the cubical-cavity benchmark problem. Special attention is paid to three-dimensional thermal characteristics in natural convection according to the new orientation at $Ra=4\times10^4$. Comparisons of the average Nusselt number at the cold face are made with benchmark solutions and experimental results found in the literature. It is found that the average Nusselt number at the cold face has a maximum value at the doubly-inclined angle ranging from $40^{\circ}\;to\; 45^{\circ}$ We also report the effect of new orientation on the type of temperature structure in a doubly-inclined cubical-cavity.

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References

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  1. Numerical Investigation on Heat Transfer Characteristics for Natural Convection Flows in a Doubly-Inclined Cubical-Cavity vol.33, pp.6, 2009, https://doi.org/10.3795/KSME-B.2009.33.6.435