気流中に置かれた三次元台状物体の表面上を移動する液滴群の数値シミュレーション(流体工学,流体機械)

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書誌事項

タイトル別名
  • Numerical Simulation of Droplets Moving on Surface of Three-Dimensional Trapezoidal Object in Air Flow(Fluids Engineering)
  • 気流中に置かれた三次元台状物体の表面上を移動する液滴群の数値シミュレーション
  • キリュウ チュウ ニ オカレタ 3ジゲンダイジョウ ブッタイ ノ ヒョウメン ジョウ オ イドウ スル エキテキグン ノ スウチ シミュレーション

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説明

In this study, we numerically simulated behavior of droplets moving on a surface of a solid three-dimensional trapezoidal object exposed to air flow. This condition can be related to a case that an automobile runs in the rain. The Lagrangian model was applied to the droplets, where motion of each droplet was tracked in the simulation. Aerodynamic drag force, adhesion force, viscous friction, and gravity on the droplet were considered, and parameters in their model were identified by results of some elemental experiments. And, size distribution and coalescence of droplets were also considered. In the results, larger droplets grown by their coalescences climbed up on the front face of the object, and some droplets were collected on a region of the side face where there was a vortex generated by flow separation from the edge of the front face. These phenomena were similar to those observed in experiments.

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