PID制御とリニアフォーシングを用いて生成される境界層乱流の空間構造に及ぼす外層擾乱の影響

抄録

Large-eddy simulations (LESs) of a boundary layer flow were performed using a turbulence generation method based on linear forcing and proportional-integral-differential (PID) control. The characteristics of flow and scalar fields generated by this method were similar to the presumed characteristics of an atmospheric surface-layer flow. Moreover, the numerical results suggested that strong downward flows originating from large scale disturbance above the surface layer strengthen coherent motion in the surface layer, being consistent with existing literature. These results support that this method has applicability as an inflow turbulence generator for LESs of spatial developing flows including an atmospheric surface layer.