Abstract
The results of numerical solutions on air flow and gas diffusion around a building model were compared with the results of wind tunnel experiment. The building model was led in a two dimensional flat plate, and the propane gas was discharged behind that building model. In order to analyze the turbulent air flow, the two-equation model of turbulence was used and steady solutions could be obtained. The results were as follows, 1) A distance of a reattachment point from a building model obtained from the numerical solution was almost equal to that from the experiment. 2) The solutions of velocity, turbulence energy, and Reynolds stress were comparatively consistent with the experimental results. 3) The computed gas concentration agreed with that measured in wind tunnel except the region closely near the building model. From these results, this method was showed to have efficiency to some extent as a predictive method of an actual turbulent boundary layer flow.
