Analysis of Cross Ventilation Airflow in and Around Simple House Model Considering Flow Fluctuation

高野, 康夫; 赤林, 伸一; 富永, 禎秀; 坂口, 淳; 本田, 美穂; 有波, 裕貴

doi:10.3130/aije.80.925

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Many previous studies have noted that the ventilation rate cannot be estimated from the time‐averaged velocity at the openings. This is because it becomes zero based on the continuous equation in the LAT case, where the openings are facilitated symmetrically in the streamwise direction 24 . However, the maximum and minimum velocities (which reflect non‐stationary instantaneous wind events) are considered as qualitatively predictable if the indoor scalar velocity is obtained in the steady‐state analysis.…”

Section: Resultsmentioning

confidence: 99%

“…This is because it becomes zero based on the continuous equation in the LAT case, where the openings are facilitated symmetrically in the streamwise direction. 24 However, the maximum and minimum velocities (which reflect nonstationary instantaneous wind events) are considered as qualitatively predictable if the indoor scalar velocity is obtained in the steady-state analysis. The scalar velocity could be useful for evaluating the dynamic natural ventilation rate.…”

Section: Distributions Of Area-averaged Indoor Velocitymentioning

confidence: 99%

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Computational fluid dynamics for cross‐ventilated airflow in an urban building

Hirose

Ikegaya

Hagishima

et al. 2022

Japan Architectural Review

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In this study, the velocity field in a naturally ventilated building within an urban‐like array was explored using large‐eddy simulations. Reduced‐scale building models were used to examine the impacts of the geometric conditions in the surrounding buildings and cross‐ventilating windows on the flow statistics and instantaneous velocity fields in the sheltered building. The instantaneous velocity components averaged in the opening area were calculated for each condition of the building arrays and openings. The results indicate that the surrounding urban geometry significantly affects the turbulent opening velocities. Additionally, the three‐dimensional instantaneous velocity distributions within the target building clearly demonstrate considerable differences under the different building and opening conditions. Such differences also affect the mean, maximum, and minimum wind speeds within the indoor regions. Moreover, the distributions of the two‐point correlation coefficient (defined by the velocities normal to the windows at the center of the windward opening and inside the building) were compared for each condition. The strong correlations near the two openings indicate that the instantaneous velocity generated by the surrounding buildings is an important factor in determining the statistical and instantaneous features of indoor ventilating airflows.

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Section: Resultsmentioning

confidence: 99%

Section: Distributions Of Area-averaged Indoor Velocitymentioning

confidence: 99%

Computational fluid dynamics for cross‐ventilated airflow in an urban building

Hirose

Ikegaya

Hagishima

et al. 2022

Japan Architectural Review

View full text Add to dashboard Cite

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Performance evaluation of single-sided natural ventilation for generic building using large-eddy simulations: Effect of guide vanes and adjacent obstacles

Arinami

Akabayashi

Tominaga

et al. 2019

Building and Environment

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130 Year History of Building Natural Ventilation Research in Japan － a Narrative Review

Kobayashi

2018

Journal of Environmental Engineering (Transactions of AIJ)

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This article gives a brief history of building natural ventilation research over 130 years in Japan based on the author's perspective, aiming to provide a bac ground for researchers in this eld The scienti c research on ventilation as rst seen in the 1 0s and it had been studied mainly in the eld of public health research until the 1 0s any or s came to be seen in the architectural engineering after ard, and it is no adays regarded as a mature research eld The article concludes ith an interpretation of the meanings and importance of the research or s conducted in such a ell-developed eld

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Analysis of Cross Ventilation Airflow in and Around Simple House Model Considering Flow Fluctuation

Cited by 4 publications

References 2 publications

Computational fluid dynamics for cross‐ventilated airflow in an urban building

Computational fluid dynamics for cross‐ventilated airflow in an urban building

Performance evaluation of single-sided natural ventilation for generic building using large-eddy simulations: Effect of guide vanes and adjacent obstacles

130 Year History of Building Natural Ventilation Research in Japan － a Narrative Review

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