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채널 내 주기적으로 배열된 요철 형상이 난류 유동장/온도장에 미치는 영향 연구
최도형(D.H. Choi),유동렬(D.N. Ryu),한유신(Y.S. Han) 한국전산유체공학회 2002 한국전산유체공학회 학술대회논문집 Vol.2002 No.-
The heat transfer characteristics of a turbulent flow in a ribbed two-dimensional channel have been investigated numerically. The fully elliptic governing equations, coupled with a four-equation turbulence model, k-ω-t²-ε_t , are solved by a finite volume method of SIMPLE type. Calculations have been carried out for three rib cross-sections: square, triangular, and semicircular, with various rib pitches and Reynolds numbers. The procedure appears to be satisfactory as the results for the square rib compare favorably with available experimental data and earlier calculation. The optimal rib pitch that yields the maximum heat transfer has been identified. It is also found that the square rib is most effective in enhancing the heat transfer. The semicircular rib, on the other hand, incurs the least amount of pressure drop but the improvement in heat transfer is substantially lower.