Numerical study of tree canopy impact on building local wind environment

2014 ◽  
Author(s):  
Z.Q. Li ◽  
X.W. Fan ◽  
S.F. Wei
Keyword(s):  
Numerical Study ◽  
Tree Canopy ◽  
Local Wind ◽  
Wind Environment

scholarly journals A Numerical Study of “Hijikawa-Arashi”: A Thermally Driven Gap Wind Visualized by Nocturnal Fog

2019 ◽  
Vol 58 (6) ◽  
pp. 1293-1307
Author(s):  
Junshi Ito ◽  
Toshiyuki Nagoshi ◽  
Hiroshi Niino
Keyword(s):  
Land Surface ◽  
Numerical Study ◽  
Sea Breeze ◽  
Early Morning ◽  
Horizontal Resolution ◽  
Local Wind ◽  
The Seto Inland Sea ◽  
Thermally Driven ◽  
Fine Resolution ◽  
Autumn And Winter

AbstractA renowned local wind in Japan, “Hijikawa-Arashi,” is a thermally driven nocturnal gap wind accompanied by fog. The wind is visually identified by the fog along the valley of the Hijikawa River between the Ozu basin and the Seto Inland Sea during the early morning in autumn and winter. A fine-resolution numerical model is employed to reproduce the main observed features of Hijikawa-Arashi. A vertical resolution of 10 m or less at the lowest level is required to express the nocturnal radiative cooling of the land that is required for fog formation in the basin, and fine horizontal resolution is necessary to express a realistic valley through which the fog is advected to the sea. Multiple hydraulic jumps accompanied by supercritical flow occur because of the complex topography. Both moisture transport by the sea breeze during the daytime and evaporation from the land surface are important for accumulating moisture to produce the fog.

Verification of a tree canopy model and an example of its application in wind environment optimization

2012 ◽  
Vol 15 (5) ◽  
pp. 409-421 ◽  
Author(s):  
Yi Yang ◽  
Zhuangning Xie ◽  
Tim K.T. Tse ◽  
Xinyang Jin ◽  
Ming Gu
Keyword(s):  
Tree Canopy ◽  
Wind Environment ◽  
Canopy Model

Diao Bingshan Sun City Endowment Community Wind Environment Design

2012 ◽  
Vol 178-181 ◽  
pp. 741-746
Author(s):  
Yao Fu ◽  
Xian Jing Yang
Keyword(s):  
The Elderly ◽  
Building Energy ◽  
Project Design ◽  
Environment Design ◽  
Local Wind ◽  
Wind Environment ◽  
Factors Affecting ◽  
Energy Evaluation ◽  
The Impact

For the elderly special physiological needs, used of building energy evaluation software named Autodesk Vasari to simulate the wind environment of the planning area. Explored the impact of the wind environment on choosing the location of Diao Bingshan Sun city endowment community. And used software to simulate and contrast, optimized local wind environment from layout view. Finally, use the conclusions to guide this project design and summarize the factors affecting the outdoor wind environment in order to guide the design of similar projects.

scholarly journals A Numerical Study of Coastal-Trapped Waves in Jervis Bay, Australia

2018 ◽  
Vol 48 (11) ◽  
pp. 2555-2569
Author(s):  
Fanglou Liao ◽  
Xiao Hua Wang
Keyword(s):  
Wind Stress ◽  
Numerical Study ◽  
Ocean Model ◽  
Local Wind ◽  
Trapped Waves ◽  
Temperature Oscillations ◽  
Coastal Trapped Waves ◽  
Level Data ◽  
Typical Temperature ◽  
Observational Program

AbstractCoastal-trapped waves (CTWs) in Jervis Bay were investigated using a Jervis Bay Ocean Model (JBOM), based on the Princeton Ocean Model. Under the typical temperature stratification in Jervis Bay in summer, the first three modes of external CTWs can scatter into the bay. The wind stress inside Jervis Bay can generate CTWs, and the wind stress on the adjacent shelf can also generate CTWs in the bay by oscillations at the bay's opening, which are associated with temperature fluctuations there. The actual subinertial CTWs in Jervis Bay are a result of the interference of these CTWs. The amplitudes of the first three CTW modes were calculated from the observed sea level data. Three numerical experiments were designed to identify the major forcing for the observed subinertial temperature oscillations in Jervis Bay during an observational program in the summer of 1988/89. It was found that the local wind stress was the major contributor to the observed oscillations.

Numerical Modeling of Wind around Buildings of Different Heights

2015 ◽  
Vol 789-790 ◽  
pp. 1129-1133
Author(s):  
Ahmed M.A. Sattar ◽  
Mohamed Elhakeem
Keyword(s):  
Numerical Modeling ◽  
Standard Deviation ◽  
Flow Pattern ◽  
Numerical Study ◽  
Tall Buildings ◽  
Turbulence Level ◽  
3D Flow ◽  
Wind Environment ◽  
Velocity Magnitude

This paper presents a numerical study to simulate airflow around an array of buildings with different heights. The simulation showed a complex 3D flow pattern around the buildings. The velocity and standard deviation around the short buildings increased by about 30% compared to the same arrangement with buildings of the same height. Thus, the existence of the tall buildings increased the turbulence level and velocity magnitude around the short buildings. This suggests that the proposed buildings arrangement and spacing were effective in improving the wind environment around the buildings.

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