基于建筑物楔形缝隙的室外悬浮颗粒穿透建筑过程模拟分析

Process Modeling of Ambient Particle Penetration through Building V Cracks

室外环境对于室内环境的影响受到了广泛的重视。在密闭条件下,室外污染一般通过建筑缝隙渗透到室内。利用数值模拟手段,研究楔形缝隙等不同缝隙形状下,室外悬浮颗粒物建筑缝隙穿透过程的影响。研究结果表明,楔形缝隙夹角对于粒径小于0.1μm和大于1μm的颗粒物穿透过程影响较为明显,同时在楔形缝隙入口高度相同时,透系数随着夹角的增大而减小。

The impact of ambient environment on indoor environment has received widespread attention. Ambient l pollutants generally penetrate inwards through building cracks under sealed conditions. Based on the numerical simulation, the penetrating process of 37 particles with the size ranging from 0.01 to 100μm was studied. The impact of V cracks in the penetration process on particles smaller than 0.1 μm or larger than 1μm in diameter was evident. Meanwhile, the penetration coefficient was in opposite proportion to the intersection angle when the inlet heights of V cracks were the same.