...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Building and Environment >Trajectories of large respiratory droplets in indoor environment: A simplified approach
【24h】

Trajectories of large respiratory droplets in indoor environment: A simplified approach

机译：室内环境大型呼吸液滴的轨迹：简化的方法

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The recent pandemic of COVID-19 has brought about tremendous impact on every aspect of human activities all over the world. The main route of transmission is believed to be through coronavirus-bearing respiratory droplets. The respiratory droplets have a wide spectrum in droplet size, ranging from very small droplets (aerosol droplets) to large droplets of tens and even hundreds of mu m in size. The large droplets are expected to move like projectiles under the action of gravity force, buoyancy force and air resistance. Droplet motion is complicated by droplet evaporation, which reduces droplet size in its trajectory and affects the force acting on it. The present work attempts to determine the trajectories of the large droplets by using a simplified single-droplet approach. It aims at providing a clear physical picture to elucidate the mechanics involved in single droplet motion and the various factors affecting the range. Assuming an indoor environment with an air temperature of 18 degrees C and relative humidity of 50%, the horizontal range L-x of large respiratory droplets (diameter 120 mu m-200 mu m) in common respiratory activities are as follows: Speaking, L-x approximate to 0.16 m-0.68 m, coughing, L-x approximate to 0.58 m-1.09 m, and sneezing, L-x approximate to 1.34 m-2.76 m. For the smaller droplets (diameter 100 mu m), the droplets are reduced to aerosol droplets (= 5 mu m) due to evaporation, and will remain suspended in the air instead of falling onto the ground like a projectile.
机译：最近的Covid-19大流行为世界各地的人类活动的各个方面带来了巨大影响。认为主要的透射途径是通过冠状病毒的呼吸液滴。呼吸液滴在液滴尺寸中具有宽的光谱，从非常小的液滴（气溶胶液滴）到大小的大小液滴的大小。预计大液滴将在重力力，浮力力和空气阻力下移动射弹。液滴运动通过液滴蒸发复杂，这在其轨迹中降低了液滴尺寸，并影响作用的力。目前的工作试图通过使用简化的单液滴方法来确定大型液滴的轨迹。它旨在提供明确的物理图片，以阐明单滴运动的机制和影响范围的各种因素。假设空气温度为18摄氏度和相对湿度为50％的室内环境，常见呼吸活动中大呼吸液滴的水平范围Lx（直径120 mu m-200 mu m）如下：说出，LX近似0.16 m-0.68米，咳嗽，Lx近似为0.58 m-1.09 m，并打喷嚏，lx近似为1.34 m-2.76 m。对于较小的液滴（直径<100μm），由于蒸发而减少到气溶胶液滴（<=5μm）的液滴，并且将保持悬浮在空中，而不是落在地面上。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号