Comprehensive validation of experimental and numerical natural ventilation predictions based on field measurement with experimental house

Hu, Hengshan; Kikumoto, Hideki; Ooka, Ryozo; Lin, Chao; Zhang, Bingchao

doi:10.1016/j.buildenv.2021.108433

Cited by 20 publications

(5 citation statements)

References 36 publications

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“…Fan et al [55] implemented a full-scale field study of an office room in London, UK, and the accuracy of simple analytical ventilation models was validated. Hu et al [56] conducted field measurements of a cross-ventilated experiment house with a sloping roof (7.28 m(W) × 12.74 m(D) × .555 m(H)) under diverse wind attack angles in Chiba, Japan. A compressive comparative study among full-scale experiment, wind tunnel test and CFD results were performed.…”

Section: Full-scale Experimentsmentioning

confidence: 99%

A literature review of cross ventilation in buildings

Jiang

Kobayashi

Yamanaka

et al. 2023

Energy and Buildings

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Section: Full-scale Experimentsmentioning

confidence: 99%

A literature review of cross ventilation in buildings

Jiang

Kobayashi

Yamanaka

et al. 2023

Energy and Buildings

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“…The experimental house is located at the Kashiwa Campus of the University of Tokyo (Institute of Industrial Science, Chiba Experiment Station) [6]. A schematic of the building is shown in Fig.…”

Section: Experimental Housementioning

confidence: 99%

A numerical study on natural ventilation promotion and control in experimental house with fluid diode window

Kikumoto

Zhang

2022

E3S Web Conf.

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The objective of this study is to investigate the effects of installing a fluid diode window (FDW) in buildings to promote natural ventilation by controlling ventilation paths. An FDW is a porous plate with an internal structure that provides varying resistance to airflow depending on the flow direction. An FDW was installed in the bathroom of an experimental house to prevent polluted air from flowing into the adjacent multipurpose room during ventilation. Computational fluid dynamics simulations with a steady Reynoldsaveraged turbulence model and tracer gas method were performed to evaluate the performance of the FDW. The results show that an open window or FDW in the bathroom reduced the concentration and increased the ventilation rate. In the same wind direction at which the airflow exits through the window or FDW, it flows out at almost the same volumetric flow rate. In the cases where the airflow enters the bathroom through the window or FDW, the effect of preventing backflow from the bathroom window to the multipurpose room can be observed when the FDW was utilised, resulting in a reduction or even prevention of the gas entering the multipurpose room.

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“…WTEs are often conducted in a constant cross-section wind tunnel. [16][17][18][19] In addition, pressure gradient was also found to occur in computational fluid dynamics (CFD) simulations, which brought additional concerns in the prediction of surface pressure. 20 A pressure gradient may result in a certain degree of discrepancy in the flow regimes and turbulence properties.…”

Section: Introductionmentioning

confidence: 99%

“…However, an adjustable ceiling was not adopted in all the wind tunnels. WTEs are often conducted in a constant cross‐section wind tunnel 16–19 . In addition, pressure gradient was also found to occur in computational fluid dynamics (CFD) simulations, which brought additional concerns in the prediction of surface pressure 20 …”

Section: Introductionmentioning

confidence: 99%

Investigation on favorable pressure gradient in an atmospheric boundary layer wind tunnel using large‐eddy simulation and its impact on wind field and surface pressure measurement

Zhang

Ooka

Kikumoto

et al. 2023

Japan Architectural Review

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A constant cross‐section wind tunnel usually experiences a negative pressure gradient (ie, favorable pressure gradient, FPG), resulting in a certain degree of discrepancy between the simulated and idealized atmospheric boundary layer (ABL) flows. To investigate its impact, three large‐eddy simulation (LES) cases were conducted in this study: one simply reproduced a wind tunnel, one removed the FPG by adjusting the ceiling height, and one reduced the FPG by canceling unnecessary boundary layers associated with the tunnel sidewalls and ceiling. The required ceiling height in the second case was estimated based on the pressure gradient in the first case. The FPG was found mainly generated by the contraction effect induced by the boundary layers over the tunnel walls because it can be largely removed in the third case. In addition, we investigated the mean and standard deviation of the surrounding wind field and surface pressure coefficient of an isolated square‐section building model. Because the FPG in the macroscale ABL is negligible compared with the adverse pressure gradient in the microscale near‐wall boundary layers of the building, the influence of the FPG is negligible in a wind tunnel experiment conducted in a relatively large wind tunnel with a safe blockage ratio.

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Comprehensive validation of experimental and numerical natural ventilation predictions based on field measurement with experimental house

Cited by 20 publications

References 36 publications

A literature review of cross ventilation in buildings

A literature review of cross ventilation in buildings

A numerical study on natural ventilation promotion and control in experimental house with fluid diode window

Investigation on favorable pressure gradient in an atmospheric boundary layer wind tunnel using large‐eddy simulation and its impact on wind field and surface pressure measurement

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