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人体上呼吸道口喉呼吸流涡结构演化对病毒气溶胶扩散的影响研究

DOI: 10.1360/052011-569, PP. 1000-1007

Keywords: 上呼吸道,口喉模型,呼吸流,涡结构演化,病毒气溶胶扩散

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Abstract:

揭示涡结构演化对病毒气溶胶扩散的影响作用,对于有效防治呼吸道疾病具有非常重要的意义.本文运用大涡模拟的方法,对人体在循环呼吸模式下口喉模型内的涡结构演化及气溶胶扩散进行了数值仿真研究,分析了口喉模型内涡结构演化过程以及气溶胶扩散状态.结果表明:受呼吸流涡结构演化的影响,颗粒轨迹主要分布在上气道内涡量集中的区域;受横向涡结构和纵向涡结构的共同影响,部分病毒气溶胶颗粒具备了混合有环状轨迹和波状轨迹的螺旋状轨迹.本研究从微观角度揭示了涡结构演化与气溶胶扩散行为的关系,为深入认识病毒气溶胶上呼吸道传播特点提供了新的途径.

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