回転円盤からの熱伝達に及ぼす流体密度変化の効果 : 境界層近似による数値解析

概要

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In a rotating flow field, change of fluid density caused by temperature variation influences on the flow field itself through the centrifugal and Corioli's forces. In this report, we presented the effects of density change of fluid on flow around a heated or cooled rotating disk and on heat transfer from the disk, applying numerical method with boundary layer approximation. From the results of this analysis, it was shown that, when fluid was cooled by the disk, boundary layer thickness on the disk decreased and heat transfer from the disk was augmented. The augmentation of heat transfer was not corrected perfectly by the traditional method using the film temperature. When the Karman's non-dimensional abscissa dζ= dz√<pω/ν> was employed into the local flow field, the distributions of velocity components and temperature in the boundary layer were estimated well, but heat transfer rate indicated over estimation with this method.
岐阜工業高等専門学校の論文
2002-03-01