有限体積法に基づくLarge Eddy Simulationのための対流項離散化スキームの検討

建物屋上面からの排ガス拡散への大気安定度の影響　その2

抄録

 Validation of Large Eddy Simulation based on a Finite Volume Method was undertaken using data from our previous experiment. Four schemes for convection-term discretization were tested on a momentum transport equation, a passive scalar transport equation and an active scalar transport equation. The results support the use of a low-dissipation scheme for the momentum transport equation to avoid overestimating circulation on a rooftop. Such overestimation of circulation can lead to an underestimation of concentrations behind the building. Conversely, a bounded scheme, even in cases that resulted in excess numerical dissipation, is preferred for each scalar transport equation to maintain a profile and peak concentration value.