B-222 粗面を伴う回転チャネル乱流の直接数値シミュレーション

概要

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Rotating flows over rough walls with heat transfer are encountered in many engineering-relevant applications such as in turbo-machinery. However, it is no easy matter to make fine measurements of rotating flows with heat transfer. Thus, direct numerical simulation (DNS) of heat transfer in a turbulent rotating channel flow with transverse-rib roughness has been performed, where we show how rotation and roughness affect velocity and thermal fields. In rotating channel flows, it is well known that the turbulence energy is transported from the pressure side toward the suction side by the action of pairs of spanwise vortices due to rotation. In the present study, the rotating channel flow with transverse-rib roughness is found to give results similar to those of no roughness cases. These results can be attributed to the fact that the rotational effect overwhelms the wall-roughness effect over the entire flow field.
日本流体力学会の論文
2003-07-28