風速場とネットの変形に関する連成解析

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  • Numerical Calculation on Interaction of Wind Flow and Motion of a Net
  • フウソクバ ト ネット ノ ヘンケイ ニ カンスル レンセイカイセキ

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This paper presents a numerical method of predicting dynamic motion of a net in the wind flow. The flexible and incompressive net method was used for the numerical simulation for dynamic motion of a net. The large eddy simulation was used for the numerical calculation for unsteady turbulent flow around the net. The net was modeled as a mesh consisting of nonlinear line components. The wind force to the modeled net was evaluated as a drug force, which was described as a function with the angle between the wind vector and the normal vector to the modeled net component based on the wind tunnel experiment. The force term equivalent to the reacting force of the wind force to the net was added to the momentum equation of the flow. The dynamic motion of the net and turbulent flow were calculated simultaneously. The calculated results were compared with the wind tunnel data and evaluated quantitatively. The predicted motion of the net shows good correlation to the experimental results.

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