風洞実験による鉢植え植物の後流渦構造解析とキャノピ : モデルを使ったCFDシミュレーション

概要

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A wake of plants was investigated using the wind tunnel and CFD. Two plants whose leaf area density is different were used in the wind tunnel experiments. The canopy model was used for simulating the stream. The canopy model is the standard k-ε model including a resistance term within the transport equations for the turbulence kinetic energy (k) and its dissipation rate (ε) as well as the Reynolds equation. The wind tunnel experiments showed that the wind speed near the plant was affected by the flow passing through the leaves of the plant. However, the wind speed at x=2.5W downwind was affected by the outer flow which was entrained by large eddies in the wake, where W is the width of the plant. A cavity was formed in the wake. The volume of the cavity increased as the leaf area density increased. The resistance term within the transport equations for the turbulence kinetic energy (k) and its dissipation rate (ε) affected the wind speed which passed through the plant. These terms affected to decrease the wind speed and increase the volume of the cavity
2013-03-10