Assessing Pedestrian Exposure to Heat via the Wet-Bulb Globe Temperature Using Mobile Phone Location Data and Urban Thermal Simulations

Buildings, Год журнала: 2025, Номер 15(5), С. 676 - 676

Опубликована: Фев. 21, 2025

The recent rise in temperatures urban areas has raised concerns about various health problems, such as heat-related illnesses. This study quantified the number of individuals exposed to outdoor heat during daytime summertime waterfront area Tokyo. Conventional meteorological observation and administrative data are insufficient for high-resolution analyses people flow conditions environments. Therefore, this introduced a new methodology combining computational fluid dynamics (CFD) mobile phone global positioning system (GPS) data. A numerical simulation was performed estimate wet-bulb globe temperature (WBGT) by analyzing radiation models. WBGT parks determined be approximately 27 °C, while on-road exceeded 29 °C. Simultaneously, pedestrian density assessed collecting GPS data, revealing that pedestrians concentrated near stations, office areas, shopping districts within 5 km × area. Furthermore, review stroke cases (2010–2020) indicated yielded stronger correlations with than considering alone. Finally, risk index established, integrating heat, flow, aging rate, which more accurately predicted cases.

Язык: Английский

---

Recent progress in optimization of RANS turbulence models for accurate urban airflow and contaminant dispersion simulations

Sustainable Cities and Society, Год журнала: 2025, Номер unknown, С. 106336 - 106336

Опубликована: Март 1, 2025

Язык: Английский

---

Identifying the effect of architecture morphology on wind fields and PM2.5 dispersion at the urban block scale via a combined scheme

Urban Climate, Год журнала: 2025, Номер 61, С. 102443 - 102443

Опубликована: Май 6, 2025

Язык: Английский

---

Effects of aeroelasticity and wind direction on the aerodynamic characteristics and structural responses of blades for horizontal-axis wind turbines under typhoons

Journal of Wind Engineering and Industrial Aerodynamics, Год журнала: 2025, Номер 263, С. 106125 - 106125

Опубликована: Май 13, 2025

Язык: Английский

---

Turbulent characteristics in the atmospheric boundary layer under neutral and unstable thermal stratifications based on LES

Journal of Wind Engineering and Industrial Aerodynamics, Год журнала: 2025, Номер 263, С. 106126 - 106126

Опубликована: Май 14, 2025

Язык: Английский

---

Approximating wind speed probability distributions around a building by mixture weibull distribution with the methods of moments and L-moments

Journal of Wind Engineering and Industrial Aerodynamics, Год журнала: 2024, Номер 257, С. 106001 - 106001

Опубликована: Дек. 25, 2024

Язык: Английский

---

Stream-wise wind penetration of urban areas under the influence of thermal buoyancy

Building and Environment, Год журнала: 2024, Номер 264, С. 111929 - 111929

Опубликована: Авг. 8, 2024

Язык: Английский

---

Pedestrian-level low-occurrence wind speeds in an urban area predicted by artificial neural networks from fundamental statistics

Sustainable Cities and Society, Год журнала: 2024, Номер 115, С. 105828 - 105828

Опубликована: Сен. 16, 2024

Язык: Английский

---

Influence of Urban Morphologies on the Effective Mean Age of Air at Pedestrian Level and Mass Transport Within Urban Canopy Layer

Buildings, Год журнала: 2024, Номер 14(11), С. 3591 - 3591

Опубликована: Ноя. 12, 2024

This study adapted the mean age of air, a time scale widely utilized in evaluating indoor ventilation, to assess impact building layouts on urban ventilation capacity. To distinguish it from its applications enclosed environments, index was termed effective air (τ¯E). Based an experimentally validated method, computational fluid dynamic (CFD) simulations were performed for parametric studies four generic parameters that describe morphologies, including height, density, and variations heights or frontal areas adjacent buildings. At breathing level (z = 1.7 m), results indicated three distinct distribution patterns insufficiently ventilated areas: within recirculation zones behind buildings, downstream sections main road, near lateral facades. The spatial heterogeneity capacity emphasized through statistical distributions τ¯E. In most cases, convective transport dominates purging process whole canopy zone, while turbulent prevails pedestrian zone. Additionally, comparisons with reference case simulating open area highlighted dual effects buildings notably enhanced dilution promoted by helical flows between also serves as preliminary CFD practice utilizing τ¯E homogenous emission demonstrates capability assessing potential planning.

Язык: Английский

---

Evaluation of the CFD simulation method for wind prediction in complex urban spatial forms

International Journal of Environmental Science and Technology, Год журнала: 2024, Номер unknown

Опубликована: Дек. 18, 2024

Язык: Английский

---