Why do ventilation strategies matter in controlling infectious airborne particles? A comprehensive numerical analysis in isolation ward

Building and Environment, Journal Year: 2023, Volume and Issue: 231, P. 110048 - 110048

Published: Jan. 26, 2023

Language: Английский

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Assessment of Building Energy Simulation Tools to Predict Heating and Cooling Energy Consumption at Early Design Stages

Sustainability, Journal Year: 2023, Volume and Issue: 15(3), P. 1920 - 1920

Published: Jan. 19, 2023

Recent developments in dynamic energy simulation tools enable the definition of performance buildings at design stage. However, there are deviations among building (BES) due to algorithms, calculation errors, implementation non-identical inputs, and different weather data processing. This study aimed analyze several modeling same characteristic office cell comparing heating cooling loads on a yearly, monthly, hourly basis for climates Boston, USA, Madrid, Spain. First, general classification was provided, from basic online with limited capabilities inputs more advanced engines. General-purpose engines, such as TRNSYS IDA ICE, allow users develop new mathematical models disruptive materials. Special-purpose tools, EnergyPlus, work predefined standard problems permit high speed. The process reaching good agreement between all required iterations. After analyzing differences outputs software cross-validation methodology applied assess demand tools. In this regard, statistical analysis used evaluate reliability simulations, deviation thresholds indicated by ASHRAE Guideline 14-2014 were identify results that suggested an acceptable level disagreement outcomes models. highlighted only yearly not enough find annual analysis, mean percentage error values showed programs, ranging 0.1% 5.3% average values. monthly load calculated studied ranged 12% 20% Madrid 10% 14% which still considered satisfactory. normalized root square 35% 50%, far standards.

Language: Английский

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Does human movement-induced airflow elevate infection risk in burn patient’s isolation ward? A validated dynamics numerical simulation approach

Energy and Buildings, Journal Year: 2023, Volume and Issue: 283, P. 112810 - 112810

Published: Jan. 20, 2023

Language: Английский

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Particle dispersion for indoor air quality control considering air change approach: A novel accelerated CFD-DNN prediction

Energy and Buildings, Journal Year: 2024, Volume and Issue: 306, P. 113938 - 113938

Published: Jan. 26, 2024

Language: Английский

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A tracking algorithm for finite-size particles

Biomicrofluidics, Journal Year: 2025, Volume and Issue: 19(3)

Published: May 1, 2025

Particle-wall interaction is important in various applications such as cell sorting, particle separation, the entire class of hydrodynamic filtration and its derivatives, etc. Yet, accurate implementation interactions between wall finite-size particles not trivial when working with currently available tracking algorithms/packages they typically work point-wise particles. Herein, we report a algorithm that takes into account finite size nearby solid objects. A modeled set circumferential points. While fluid-particle are captured during track center, objects explicitly by examining points applying reflection scheme needed to ensure impenetrability We also modified variant auxiliary structured grid method locate hosting cells, which conjunction boundary condition enables capture As proof-of-concept, numerically experimentally study particles' motion within deterministic lateral displacement microfluidic device. The results successfully demonstrate zigzag bump modes observed our experiments. device pinched flow validate against experimental data from literature. By demonstrating an almost 8 × speedup on system eight performance threads, investigations suggest can benefit parallel processing multi-thread systems. believe proposed framework pave way for designing related chips precisely conveniently.

Language: Английский

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Ventilation strategies for mitigating airborne infection in healthcare facilities: A review and bibliometric analysis (1993–2022)

Energy and Buildings, Journal Year: 2023, Volume and Issue: 295, P. 113323 - 113323

Published: June 28, 2023

Language: Английский

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Utilising localised exhaust and air curtain to reduce airborne particle settlement on surgical patients: potential future application in operating rooms?

Journal of Thermal Analysis and Calorimetry, Journal Year: 2024, Volume and Issue: 149(19), P. 11323 - 11336

Published: April 23, 2024

Language: Английский

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Revolutionizing indoor air quality monitoring through IoT innovations: a comprehensive systematic review and bibliometric analysis

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(32), P. 44463 - 44488

Published: June 28, 2024

Language: Английский

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A CFD assessment on ventilation strategies in mitigating healthcare-associated infection in single patient ward

Progress in Energy and Environment, Journal Year: 2023, Volume and Issue: 24(1), P. 35 - 45

Published: March 27, 2023

A promising ventilation strategy is an effective measure to enhance indoor air quality and protect the patients against healthcare-acquired infection. The Computational Fluid Dynamics (CFD) model represents a patient ward that was constructed using Computer-Aided Design (CAD) software. simulated results were verified validated based on published data. Renormalization Group (RNG) k-epsilon Eulerian approach used simulate airflow turbulence, while discrete phase (DPM) Lagrangian predict dispersion of airborne particles. This study examined four cases strategies, with varying rates, positioning supply diffusers, location exhaust grilles. revealed installation curtain jet coupled ceiling-mounted diffuser (case 3) above patient-occupying zone has highest wiping efficiency infectious utilization in case 3 managed reduce particle by approximately 3.3 times as compared baseline case. outcome also suggested grilles should be placed upper wall, ensure proper mixing fresh entire ward.

Language: Английский

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Computational Fluid Dynamics as a Digital Tool for Enhancing Safety Uptake in Advanced Manufacturing Environments Within a Safe-by-Design Strategy

Materials, Journal Year: 2025, Volume and Issue: 18(2), P. 262 - 262

Published: Jan. 9, 2025

In modern manufacturing environments, pollution management is critical as exposure to harmful substances can cause serious health issues. This study presents a two-stage computational fluid dynamic (CFD) model estimate the distribution of pollutants in indoor production spaces. first stage, Reynolds-averaged Navier-Stokes (RANS) method was used simulate airflow and temperature. second Lagrangian applied for particle tracing. The theoretical acrylonitrile butadiene styrene (ABS) filament 3D printing process evaluate factors affecting ultrafine particles (30 nm). Key parameters such ventilation system effects, presence cooling fans print bed, nozzle temperatures were considered. results show that highest flow velocities (1.97 × 10-6 m/s 3.38 m/s) occur near system's inlet outlet, accompanied by regions high turbulent kinetic energy (0.66 m2/s2). These conditions promote airflow, facilitating particulate removal reducing stagnant zones prone pollutant buildup. effect thermal sources investigated, showing limited contribution on removal. findings emphasize importance digital twins better worker safety air quality environments.

Language: Английский

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