A numerical investigation of vertical and horizontal laminar airflow ventilation in an operating room
A numerical investigation of vertical and horizontal laminar airflow ventilation in an operating room
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DOI：
10.1016/j.buildenv.2014.09.013
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发表时间：
2014-12
影响因子：
7.4
通讯作者：
S. Sadrizadeh;S. Holmberg;A. Tammelin
中科院分区：
文献类型：
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作者：
S. Sadrizadeh;S. Holmberg;A. Tammelin
研究了垂直和水平通风系统在减少手术室中携带细菌颗粒的沉降和分布方面的有效性。利用计算流体力学进行了数值勘探。模拟了不同通风流量条件下的空气颗粒物浓度和沉降。通过与文献中的实验数据进行比较来验证模型。研究结果表明，手术室垂直通风和水平通风方案的选择在很大程度上取决于内部障碍物、工作实践和供气气流。手术室人员位置不当会显著降低通风效率。增加气流速率可以降低手术区域的颗粒浓度。然而，有效的通风不仅仅是增加气流速率的问题。不适当的气流速率导致流型从层流过渡到低效率的湍流混合。层流和组织良好的（单向）流型被淘汰以获得良好的效果。建议在跨学科合作中找到创新的进一步解决方案。
The effectiveness of vertical and horizontal ventilation systems in terms of reducing sedimentation and distribution of bacteria-carrying particles in an operating room is investigated. The exploration is carried out numerically using computational fluid dynamics. Both airborne particle concentration and sedimentation are simulated under different ventilation flow conditions. Model validation is performed through comparisons with experimental data from the literature. Achieved results reveal that the preferred selection between vertical and horizontal ventilation scenario in an operating room is highly depend on internal constellation of obstacles, work practice and supply airflow rate. Improper positioning of operating room personnel may remarkably reduce the ventilation efficiency. Increasing the airflow rate reduces particle concentration in the surgical zone. Efficient ventilation, however, is not only a matter of increasing airflow rate. Inappropriate airflow rates result in flow pattern transition from laminar to less efficient turbulent mixing. A laminar and well- organized (unidirectional) flow pattern is retired for a good result. Innovative further solutions are suggested to be found in cross-disciplinary collaboration.