|Table of Contents|

Influence of horizontal and downward airflow on initial aerosol movement

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2015年05期
Page:
556-
Research Field:
Publishing date:

Info

Title:
Influence of horizontal and downward airflow on initial aerosol movement
Author(s):
Wang Jiawei1Li Lei12Lu Xiaoxia1Zhao Shoutian1Chai Mingming1
1.State Key Laboratory of NBC Protection for Civilian,Beijing 102205,China;
2.Aerospace School,Tsinghua University,Beijing 100084,China
Keywords:
gas-liquid two-phase flow discrete phase model aerosol droplets horizontal and downward airflow
PACS:
O359
DOI:
-
Abstract:
Considering the droplets collision-breakup model and the effects of horizontal and downward airflow,the flow of aerosol released from the air to the open environment is investigated numerically by applying the discrete phase model of the gas-liquid two-phase flow.The motion characteristics of aerosol droplets in open environment are obtained and verified by experiments.The numerical and experimental results show that when the velocities of the horizontal and downward airflow are both small(less than 1 m/s),the ejecting angle is larger than 30°,the initial size of the particles is 100 μm,and the ejecting speed is about 80 m/s,the generated aerosol particles sedimentate to the ground in a short time.When the velocity of the horizontal airflow reaches 3 m/s,aerosol particles released under the same conditions show more difficulty to fall to the ground.In the two above cases,increasing the ejecting angle or the downward airflow velocity can make the aerosol particles sedimentate to the ground more easily.

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Last Update: 2015-10-31