DEVELOPMENT OF CFD METHOD FOR PREDICTING WIND ENVIRONMENT AROUND A HIGH-RISE BUILDING : Part2 : The cross comparison of CFD results using various k-ε models for the flowfield around a building model with 4:4:1 shape(Environmental Engineering)

白澤, 多一; 富永, 禎秀; 義江, 龍一郎; 持田, 灯; 吉野, 博; 片岡, 浩人; 野津, 剛

doi:10.3130/aijt.9.169_2

Cited by 16 publications

(2 citation statements)

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“…This paper used a no-slip wall boundary condition at all the wall surfaces and a normal zero gradient boundary condition at the domain outlet and the domain top as well as symmetrical boundary conditions at the two lateral boundaries of the domain. The boundary conditions for lateral and upper surfaces do not have significant influences on the calculated results around the target building because the computational domain is large enough [22][23][24].…”

Section: Boundary Conditions Of All the Wall Surfacesmentioning

confidence: 99%

“…Baetke et al [27] defined the blockage ratio as the ratio of the frontal area of the cube to the vertical cross-sectional area of the computational domain. On the advice of Mochida et al [22] and Shirasawa et al [23], the lateral and the top boundary should be set 5 H or more away from the building, where H is the height of the target building. The outflow boundary should be set at least 10 H behind the building.…”

Section: Domain Sizementioning

confidence: 99%

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Group Layout Pattern and Outdoor Wind Environment of Enclosed Office Buildings in Hangzhou

et al. 2020

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This paper presents a study of the effects of wind-induced airflow through the urban built layout pattern using statistical analysis. This study investigates the association between typically enclosed office building layout patterns and the wind environment. First of all, this study establishes an ideal site model of 200 m × 200 m and obtains four typical multi-story enclosed office building group layouts, namely the multi-yard parallel opening, the multi-yard returning shape opening, the overall courtyard parallel opening, and the overall courtyard returning shape opening. Then, the natural ventilation performance of different building morphologies is further evaluated via the computational fluid dynamics (CFD) simulation software Phoenics. This study compares wind speed distribution at an outdoor pedestrian height (1.5 m). Finally, the natural ventilation performance corresponding to the four layout forms is obtained, which showed that the outdoor wind environment of the multi-yard type is more comfortable than the overall courtyard type, and the degree of enclosure of the building group is related to the advantages and disadvantages of the outdoor wind environment. The quantitative relevance between building layout and wind environment is examined, according to which the results of an ameliorated layout proposal are presented and assessed by Phoenics. This research could provide a method to create a livable urban wind environment.

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Section: Boundary Conditions Of All the Wall Surfacesmentioning

confidence: 99%