Accuracy of CFD simulations in urban aerodynamics and microclimate: Progress and challenges

Tominaga, Yoshihide; Wang, Liangzhu (Leon); Zhai, Zhiqiang (John); Stathopoulos, Ted

doi:10.1016/j.buildenv.2023.110723

Cited by 31 publications

(2 citation statements)

References 94 publications

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“…The accuracy and reliability of ENVI-met in predicting microclimatic variables have been affirmed through the meticulous validation against field measurements. This aligns with the recommendations and challenges outlined by [64,65] in their recent guidelines and reviews on the urban microclimate simulation accuracy. The study builds upon earlier works [51][52][53], reinforcing ENVI-met as a reliable tool for thermal analysis and microclimate prediction.…”

Section: Field Measurements For Envi-met Model Validationsupporting

confidence: 77%

Urban Green Systems for Improving Pedestrian Thermal Comfort and Walkability in Future Climate Scenarios in London

Taher,

Elsharkawy,

Rashed

2024

Buildings

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The purpose of this research is to investigate the thermal impact of urban green systems (UGS) (trees and living facades) and high albedo pavements on reducing the urban heat island (UHI) effect in London at the pedestrian street level. The research assesses the impact of UGS by suggesting practicable urban greenery-covering densities (25% and 50%) and using high albedo pavement in current and future climatic scenarios (2050 and 2080). This approach is intended to encourage pedestrians to walk longer distances for longer durations during the warmer months, following the Transport for London’s (TfL) 2017 Healthy Streets initiative. The research seeks to measure the advantages and assess the possible impact on the comfort and activities within urban streets. The study adopts a quantitative research design using ENVI-met modelling and questionnaires. Simulation results, the subject of this paper, confirmed that, across three climatic scenarios, the optimal UGS for thermal comfort is 50% trees followed by 25% trees, dependent on street orientation and solar access. Living facades (LF) with 25% and 50% covering had no discernible effect on the comfort of pedestrians, whereas high albedo pavement increases heat stress.

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Section: Field Measurements For Envi-met Model Validationsupporting

confidence: 77%

Urban Green Systems for Improving Pedestrian Thermal Comfort and Walkability in Future Climate Scenarios in London

Taher,

Elsharkawy,

Rashed

2024

Buildings

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“…CFD's accuracy in modeling fluid flows and heat transfer is highly dependent on several factors. It requires validation with experimental data 35 . A range of educational and research institutes have developed and utilized CFD software for teaching and research purposes.…”

Section: Methodsmentioning

confidence: 99%

Integrating physical experiments with computational fluid dynamics to transform mosque minarets into efficient solar chimneys

Awad,

Desouki

2024

Sci Rep

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This study explores the potential of repurposing mosque minarets as solar chimneys in hot arid regions to facilitate natural ventilation and diminish the reliance on energy-intensive cooling systems. Originating as a means to call the faithful to prayer, minarets have become iconic landmarks within Islamic cities. This research focuses on Cairo, Egypt, as a representative hot arid environment. The paper traces the evolution of the minaret, underscoring the variations in form that influence the experimental design. The investigation proceeded in two stages: the construction of physical mosque models with variably positioned minarets for laboratory testing, ensuring standardized measurements, followed by computational fluid dynamics (CFD) simulations for comparison. Findings indicate that mosque minarets can be effectively adapted for passive ventilation, with their performance significantly influenced by orientation and placement. This study concludes that traditional mosque minarets offer a viable, sustainable option for passive cooling in hot climates.

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Developing modified k–ε turbulence models for neutral atmospheric boundary layer flow simulation using OpenFOAM

Wang,

Li,

Liu

et al. 2024

Build. Simul.

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Accuracy of CFD simulations in urban aerodynamics and microclimate: Progress and challenges

Cited by 31 publications

References 94 publications

Urban Green Systems for Improving Pedestrian Thermal Comfort and Walkability in Future Climate Scenarios in London

Urban Green Systems for Improving Pedestrian Thermal Comfort and Walkability in Future Climate Scenarios in London

Integrating physical experiments with computational fluid dynamics to transform mosque minarets into efficient solar chimneys

Developing modified k–ε turbulence models for neutral atmospheric boundary layer flow simulation using OpenFOAM

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