中間レイノルズ数域におけるフィン列の流動・伝熱特性 : 第1報,流れの非定常化とそれによる伝熱促進機搆に関する統計的検討

概要

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Unsteady flow and heat transfer characteristics were studied numerically for an in-line array of fins located in a channel. The results were found to be in reasonably good agreement with the results of flow visualization and velocity measurements. This validates the numerical scheme developed in this study. The numerical results showed that the flow and thermal fields are destabilized in the wakes but are stabilized in the boundary layers developing on the downstream fins. It is also found that -μυ and υθ take nonzero values in the wake and even in the regions near the downstream fins. Another interesting feature found in the present study is that the value of -μυ was found to be negative but the value of υθ was positive around the downstream fins. This suggests, from a statistical viewpoint, that there exists a dissimilarity between the momentum. transfer and heat transfer. This dissimilarity was found also to be related to the negative production of the intensity of fluctuating velocity.
一般社団法人日本機械学会の論文
1993-04-25