The role of near-façade flow in wind-dominant single-sided natural ventilation for an isolated three-storey building: An LES study

Ziarani, Nima Najafi; Cook, Malcolm; Freidooni, Farnood; O’Sullivan, Paul

doi:10.1016/j.buildenv.2023.110210

Cited by 12 publications

(3 citation statements)

References 59 publications

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“…The plot of the relationship after the data fitting and the Pearson's correlation coefficient are shown in Figure 19, and its Pearson's correlation coefficient (R 2 ) is 0.993. It indicates that there is a strong linear correlation between the ventilation flow rates and the wind speeds Warren [5] previously proposed a unilateral natural ventilation model, which was considered the most accurate model suitable for single-sided ventilation [5,24]. In addition, Daish [7] carried out special research about the pumping ventilation.…”

Section: The Influence Of Different Wind Speedsmentioning

confidence: 99%

“…The results of QDaish were closer to the numerical data than the Warren model, with the relative error smaller than 15%, except for the wind speed of 1 m/s. It indicated that the Warren model Warren [5] previously proposed a unilateral natural ventilation model, which was considered the most accurate model suitable for single-sided ventilation [5,24]. In addition, Daish [7] carried out special research about the pumping ventilation.…”

Section: The Influence Of Different Wind Speedsmentioning

confidence: 99%

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The Numerical Simulation Study of Pumping Airflow Driven by Wind Pressure for Single- and Multi-Room Buildings

Qiu,

Zhou,

Xiao

et al. 2023

Buildings

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Pumping airflow occurs in single-sided natural ventilation buildings when the openings are located on the leeward side; the direction of airflow through the building then changes periodicity. In order to propose a calculation method of the ventilation rates for single-room buildings and analyze the pumping ventilation for multi-room buildings, the CFD method with an SST k-ω turbulence model was used to conduct numerical simulation in this study, which is verified by other experimental results. Firstly, the qualitative and quantitative characteristics of pumping ventilation were investigated for a single-room building with two openings. The results show that the steady-state method underestimates the ventilation flow rates, and the unsteady-state method captures the microstructures of the flow better. Secondly, the vortex-shedding and indoor airflow oscillation frequencies were analyzed based on transient simulation for a single-room building. It was found that both of them increase with air speed. Then, the factors affecting ventilation flow rates were analyzed. A calculation method for dimensionless ventilation rates is proposed. Finally, the pumping ventilation for a multi-room building was numerically simulated. The ventilation rate for a middle room is greater than that for a corner room, and the ventilation rate for any room in a multi-room building is greater than the single-room building given the same room size and the same incoming wind speed. The findings of this paper are helpful for the design and evaluation of natural ventilation.

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Section: The Influence Of Different Wind Speedsmentioning

confidence: 99%

Section: The Influence Of Different Wind Speedsmentioning

confidence: 99%

The Numerical Simulation Study of Pumping Airflow Driven by Wind Pressure for Single- and Multi-Room Buildings

Qiu,

Zhou,

Xiao

et al. 2023

Buildings

View full text Add to dashboard Cite

show abstract

“…Currently, research on natural ventilation primarily focuses on the building envelope [11][12][13][14][15][16][17], building energy consumption [18][19][20] and the thermal comfort of occupants [13,[21][22][23]. The natural ventilation problems of caves differ from those of traditional buildings due to differences in their architectural forms, research contents and boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

A New Correlation for Single-Sided Natural Ventilation Rate Based on Full-Scale Experimental Study in Mogao Grottoes, Dunhuang, China

et al. 2023

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Although research on the natural ventilation of single-sided buildings is progressing, research on the natural ventilation of the Mogao Grottoes, which have special shapes and structures, is relatively limited. The purpose of this paper is to develop a correlation for calculating the natural ventilation rates of such grottoes. Field experiments were carried out on two typical caves to measure their meteorological parameters and natural ventilation rates to verify the validity of the proposed correlation. The results show that our correlation has good reliability and stability when predicting the natural ventilation rates of the caves. First, the new correlation has a small average deviation of 16.35%. The average deviations in the natural ventilation rates predicted by seven established correlations are as low as 17.85% and as high as 59.39%, revealing a large gap compared with the correlation proposed herein. Second, the maximum deviation in the outputs of the proposed correlation is only 7.70% between each case. Finally, a comparison between the calculated results and the values measured in Cave 328 shows that the correlation is also suitable for large-volume caves. The developed correlation provides theoretical support and a scientific method for preventive protection and a quantitative analysis method for the study of natural ventilation in caves.

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Enhancing building sustainability through aerodynamic shading devices: an integrated design methodology using finite element analysis and optimized neural networks

Al-Haddad,

Al-Muslim,

Hammood

et al. 2024

Asian J Civ Eng

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The role of near-façade flow in wind-dominant single-sided natural ventilation for an isolated three-storey building: An LES study

Cited by 12 publications

References 59 publications

The Numerical Simulation Study of Pumping Airflow Driven by Wind Pressure for Single- and Multi-Room Buildings

The Numerical Simulation Study of Pumping Airflow Driven by Wind Pressure for Single- and Multi-Room Buildings

A New Correlation for Single-Sided Natural Ventilation Rate Based on Full-Scale Experimental Study in Mogao Grottoes, Dunhuang, China

Enhancing building sustainability through aerodynamic shading devices: an integrated design methodology using finite element analysis and optimized neural networks

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