平面壁面噴流の組織構造に関する研究　　４象限分割法による解析

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  • The coherent structure of a plane turbulent wall jet. Analysis with the four-quadrant method.
  • ヘイメン ヘキメン フンリュウ ノ ソシキ コウゾウ ニ カンスル ケンキュウ

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Quadrant analysis has been used to investigate the events associated with the production of the Reynolds shear stress in a fully developed plane turbulent wall jet. By partitioning the stress into four quadrants, it was shown that the second and the fourth quadrants were the dominant events contributing to the stress in the inner layer, whereas the first and the third quadrants dominate in the outer layer. The flow at the location where the mean velocity has a maximum value, is affected by both the inner and the outer layer structure. At the location where the Reynolds shear stress is zero, the ratio of the fractional contributions to the total Reynolds shear stress from quadrant i and the ratio of the mean periods of quadrant i are almost equal among the quadrants.

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