B215 立方体建屋周辺のトレーサガス濃度変動の数値計算 : 濃度変動の渦スケール

概要

論文の詳細を見る
Tracer gas diffusion around a cubical building was estimated by using flow calculation results of large eddy simulation (LES) method. The concentration fluctuation was predicted both using finite difference method, in which the LES is expanded for concentration, and the puff method, in which small volumes of the tracer gas are divided and combined according to the calculation mesh sizes. In order to avoid numerical viscous effects, the puff method and finite difference method were applied in the regions near to and far from the tracer gas release point, respectively. The high concentration values and eddy scale of concentration fluctuation around a cubical building were estimated from concentration calculation results. Though the finite difference method were suitable for predicting the integral timo seale, its method overestimated the high values of concentration fluctuation.
日本流体力学会の論文
2002-07-23