Simulation of the transition of respiratory droplets to aerosol states: Implications for pathogen spread

Physics of Fluids, Год журнала: 2025, Номер 37(1)

Опубликована: Янв. 1, 2025

Airborne viruses constitute a real threat to the world and will continue do so in foreseeable future. Despite intensive research this field, physical mechanisms of droplet dynamics aerosols carrying these are far from being fully understood. Among many variables that have critical impact on dispersion virus droplets temperature relative humidity, as primarily determine longevity liquid phase droplets. While previous studied due different boundary conditions, we focus range below 10 μm shown be most likely pathway for airborne transmission. In study, spatial size evolution injected by mouth through coughing analyzed numerically compared combinations humidity. Of special interest would tracking aerosol part an indoor location serves volume conversation partner draw breath from. We present quantitative data dependence humidity plotted against time assisting quantifying possibility An Eulerian–Lagrangian approach is used study multiphase flow consisting continuous fluid formed air water vapor discrete water. analysis number aerosolized reaching depending It was concluded transmission partner, has largest influence

Язык: Английский

---

Personalized air exhaust combined with mixing ventilation for environmental management and airborne droplets in a train cabin

Physics of Fluids, Год журнала: 2025, Номер 37(3)

Опубликована: Март 1, 2025

The enclosed space and high passenger density in high-speed train cabins pose substantial challenges providing a safe, healthy, comfortable indoor environment, especially during pandemics such as COVID-19 influenza. High ventilation rates, while beneficial reducing pathogen transmission, may compromise airflow field quality result great energy consumption. Therefore, understanding the tradeoffs between transmission risk, thermal comfort, saving is critical for devising cabin systems. As primary method of regulating environments, heating, ventilation, air conditioning systems are central to this study, which proposes an improved personalized mode that combines exhaust with various supply strategies. results indicate considerably reduces longitudinal spread particles rapidly decreases their concentration air. When paired higher proportion entering through sidewall outlets, primarily diffuses upward. proposed enhances balances consumption quality, delivers significant performance improvements, including 22.4% increase utilization efficiency over 23.3% reduction suspended droplets. This study provides theoretical foundation optimizing post-pandemic era.

Язык: Английский

---

Aerosol dynamics in dental clinics: effects of ventilation mode on the mitigation of airborne diseases transmission

Environmental Pollution, Год журнала: 2025, Номер 367, С. 125645 - 125645

Опубликована: Янв. 5, 2025

Язык: Английский

---

Assessment of Aerosol Infection Risk and Airflow Organization Optimization in Biosafety Level 4 Laboratories

Journal of Building Engineering, Год журнала: 2025, Номер unknown, С. 112059 - 112059

Опубликована: Фев. 1, 2025

Язык: Английский

---

Spatial distribution of bioaerosols and evaluation of four ventilation method on controlling their diffusion in a typical enhanced biosafety level 2 laboratory

Journal of Hazardous Materials, Год журнала: 2024, Номер 475, С. 134942 - 134942

Опубликована: Июнь 16, 2024

Язык: Английский

---

Aerosol Dynamics in Dental Clinics: Effects of Ventilation Mode on the Mitigation of Infectious Respiratory Diseases Transmission

Опубликована: Янв. 1, 2024

Язык: Английский

---

Susceptibility and risk to inhalation of pathogen-laden aerosol in large public spaces: Evidence from Fangcang shelter hospitals under multiple ventilation rates

Sustainable Cities and Society, Год журнала: 2024, Номер unknown, С. 106003 - 106003

Опубликована: Ноя. 1, 2024

Язык: Английский

---

Severity and risk to inhalation of pathogen-laden aerosol in large public spaces: Insights from Fangcang Shelter Hospitals under multi-location release

Journal of Hazardous Materials, Год журнала: 2024, Номер 483, С. 136695 - 136695

Опубликована: Ноя. 27, 2024

Язык: Английский

---

Aerosol Risk Assessment and Optimization of Biosafety Level 4 Laboratory Based on Aerosol Infection Risk Zoning Analysis

Опубликована: Янв. 1, 2024

Язык: Английский

---