傾斜リブ付き正方形断面直管における層流および乱流熱伝達の比較

概要

論文の詳細を見る
Heat transfer in a rib-roughened duct was numerically simulated by using the second order finite difference method in coordinates fitted to transverse or angled ribs. Turbulent and laminar cases of which Reynolds number was 350 and 50, respectively, were computed for rib angles of 60 deg and 90 deg. For the turbulent case, the large eddy simulation was adopted with a Lagrangian dynamic subgrid-scale model. The present turbulent results clearly showed the locally high heat transfer coefficient at following locations : midpoint between ribs, in front of the rib on the rib-roughened walls, and around the rib on the side walls. The comparison between the laminar and turbulent results showed clear differences in heat transfer distribution because the higher momentum fluid of the turbulent case was more disturbed by the ribs as compared to the laminar case.
一般社団法人日本機械学会の論文
2000-05-25