基于动量源法模拟人走动对洁净室污染物扩散的影响

Effect of human walking on contamination transportation in cleanroom by using momentum theory source method

当前研究人的走动对室内污染物扩散影响的传统方法是动网格法,动网格法存在几何结构繁琐、网格复杂、计算时间长、收敛困难等缺点。应用动量源法模拟人的走动对室内气流组织和污染物扩散的影响,可节省90%的计算时间(和动网格相比),且能保持较好的准确度。结果表明,人的走动会对室内气流组织、气流速度及污染物分布产生一定的影响。

The dynamic mesh method is widely used for simulating object's movement,however the dynamic mesh method has some disadvantages,such as complicated geometry,complex mesh,long computing time and convergence difficulty.Thus,the momentum theory method is applied in this study to reduce calculation time.90%calculation time is reduced by using the momentum theory method,and the results indicates that decay rate decreased in presence of object moving.It points out that the clean room and operating room should be considered about the influences induced by human activities.