Impact of impinging jet ventilation on thermal comfort and aerosol transmission: A numerical investigation in a densely-occupied classroom with solar effect

Journal of Building Engineering, Год журнала: 2024, Номер 94, С. 109872 - 109872

Опубликована: Июнь 19, 2024

Язык: Английский

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Influence of indoor airflow on airborne disease transmission in a classroom

Building Simulation, Год журнала: 2024, Номер 17(3), С. 355 - 370

Опубликована: Янв. 19, 2024

Язык: Английский

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On Euler-Lagrange URANS turbulence models for predicting the transient dispersion of aerosols indoors

Building and Environment, Год журнала: 2025, Номер unknown, С. 112601 - 112601

Опубликована: Янв. 1, 2025

Язык: Английский

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Optimization of ventilation and dust removal parameters in plateau extra-long tunnel inclined shaft based on orthogonal numerical simulation test method

Construction and Building Materials, Год журнала: 2024, Номер 455, С. 139131 - 139131

Опубликована: Ноя. 13, 2024

Язык: Английский

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Optimization strategy for minimizing energy consumption of air conditioning terminal system in the Internet data center

Journal of Building Engineering, Год журнала: 2024, Номер 96, С. 110315 - 110315

Опубликована: Июль 30, 2024

Язык: Английский

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An Experimental Study on the Efficacy of Local Exhaust Systems for the Mitigation of Exhaled Contaminants in a Meeting Room

Buildings, Год журнала: 2024, Номер 14(5), С. 1272 - 1272

Опубликована: Май 1, 2024

In industrial applications, local exhaust systems have been used extensively for capturing and confining contaminants at their source. The present study investigates the efficacy of these in mitigating spread exhaled pollutants by combining them with mixing displacement ventilation. Experiments were conducted a simulated meeting room six closely situated workstations, featuring five exposed persons (simulated heated dummies) one infected person breathing manikin). Six overhead units, merged panels, corresponding to installed using lowered false ceiling. Additionally, table plenum setting air inlets was introduced enhance ventilation effectiveness along systems. Results from 16 experimental cases are presented, quality index zone. system improved measuring locations closest infector almost all test scenarios. improvement, particularly significant ventilation, marked maximum 35% increase adjacent 25% entire zone tested room. Moreover, settings, coupled further enhanced conditions Under specific this investigation, number operational exhausts had marginal impact on but tests. also influenced levels heat gains Overall, aims contribute ongoing efforts identify sustainable solutions mitigate indoor airborne diseases combination supply units.

Язык: Английский

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Study on the characteristics of dust diffusion during a truck travelling in an open-pit coal mine affected by the vertical wind shear

Journal of Hazardous Materials, Год журнала: 2024, Номер 483, С. 136611 - 136611

Опубликована: Ноя. 20, 2024

Язык: Английский

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Factors influencing the results of air samplers in closed, air-conditioned patient rooms—a numerical study

Environmental Science and Pollution Research, Год журнала: 2025, Номер unknown

Опубликована: Март 5, 2025

Several air sampling studies have been conducted to assess the risk of airborne transmission since outbreak SARS-CoV-2 in late 2019. However, differences sampler positioning and positive collection results more distant locations suggest an interaction between indoor flow, altering aerosol distribution. This study aims investigate this influence by studying multiple collector positions, patient exhalation modes, two ventilation setups a 3D simulation model using implicit large-eddy simulations along with evaporative Lagrangian particles. The show higher total particle amount room deployment device, possibly increasing infection for medical personal during shortly after procedure. Furthermore, variation position reveals impact on yield, thus rendering even positions viable potentially beneficial terms maintaining performance comfort. Moreover, was investigated suggesting deactivation increase concentration campaigns efficient sampling. Additionally, indicate flow samplers subsequent necessitating reassessments conclusions drawn from previous studies. Finally, it can be concluded that future campaigns, which are preliminarily assessed numerical simulation, could benefit advantageous aid success.

Язык: Английский

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Numerical modeling of particle transport in an allergen exposure chamber

Aerosol Science and Technology, Год журнала: 2025, Номер unknown, С. 1 - 16

Опубликована: Май 27, 2025

Язык: Английский

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Quantifying airborne transmission in ventilated settings: A review

Building and Environment, Год журнала: 2024, Номер 266, С. 112049 - 112049

Опубликована: Сен. 3, 2024

As mandatory masking and social distancing measures decrease post-COVID-19, the risk of airborne pathogen transmission in crowded indoor spaces remains a significant public health concern. The pandemic highlighted critical role air quality ventilation mitigating spread infectious diseases, underscoring urgent need to improve our understanding prediction airflow minimize transmission. In this review, studies on settings were systematically reviewed identify research gaps recommend changes approach. analysis is categorized into airflow, dynamics respiratory particles (IRPs), investigation methodologies. Findings reveal that almost 40% literature does not specify type setting, with only 3% focusing restaurant environments. Additionally, conditions are typically assumed be constant, activities often limited coughing breathing. review identifies challenge replicating complex behaviour IRPs experiments computational expense predicting turbulent flows. Recommendations for future include: i) like restaurants, ii) considering varying temperatures humidity, iii) examining speech-related flows, iv) employing visual accurate tools investigate particle-laden airflow. These insights aim enhance guidelines building designs reduce diseases.

Язык: Английский

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