改良形κ-εモデルを用いた加熱層流化現象の解析

概要

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The aim of this paper is to reveal the laminarization phenomena of the circular tube flows through numerical simulation, where the author's modified k-ε turbulence model was used. The second purpose is to confirm the ability of this model, which was partly established in the preceding report, for the annular tube flows. It was found that this model achieves a sufficient degree of accuracy in reproducing the streamwise variation of the Stanton number, which has not been obtained by other k-ε models. The turbulence energy profiles of laminarizing flows were clearly distinguished from case where the Nusselt number decreases simply because of the local change in the viscosity. Obtained criteria for occurrence of the laminarization were in good agreement with existing experimental results. It was concluded, therefore, that this model can be applied to various situations of flow and heat transfer.
社団法人日本機械学会の論文
1989-10-25