AM05-14-008 DNSによる矩形曲り流路内の乱流熱伝達解析(乱流熱物質移動および反応流2,一般講演)

概要

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Direct numerical simulations of fully developed turbulent flow with heat transfer in a spanwise rotating curved square duct have been performed in order to investigate the combined effects of curvature, rotation and walls on the structure of turbulent heat transport. The curvature is 0.013, and the rotation numbers are set to -0.5, 0.0 and +0.5. In a curved duct flow, since the large-scale mean secondary flows are generated, the laminarization is observed on the convex side. In the curved duct with negative rotation, turbulence is suppressed in most parts of the duct except near the concave wall. On the other hand, in the case of positive rotation, we can observe several statistical characteristics similar to those in a straight square duct, indicating that the rotation effects undercut the curvature effects.
日本流体力学会の論文
2005-09-05