流れの数値解析と化学装置のモデリング  直接数値シミュレーションによる波状壁面上に働く抗力の評価

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タイトル別名
  • Computation Transport Phenomena in Chemical Engineering. Direct Numerical Simulation of Drag Forces on Wavy Walls.
  • チョクセツ スウチ シミュレーション ニヨル ハジョウ ヘキメンジョウ ニ ハ

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抄録

Friction and pressure drags acting on two- and three-dimensional wavy walls are investigated using a three-dimensional direct numerical simulation (DNS). Two conventional methods for estimating the friction velocity from the log-law of the mean velocity and a peak value of the Reynolds stress were also examined applying the result of DNS. The results show that the ratio of the friction drag to the pressure drag is 0.86 and 2.9 for two-and three-dimensional wavy walls, respectively. Both conventional methods overestimate the friction velocity at about 10% for a two-dimensional wavy wall but they give good accuracy for a three-dimensional wavy wall.

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