scholarly journals Analysis and Research on Ventilation Strategy of the Common Forms of Windows Based on CFD Simulation

2021 ◽  
Author(s):  
Huifang Liu ◽  
Yi Hu ◽  
Yang Wang
Keyword(s):  
Wind Speed ◽  
Cfd Simulation ◽  
Ventilation Strategy ◽  
Open Area ◽  
Strategy Analysis ◽  
Wind Environment ◽  
Window Opening ◽  
The Common

Based on the common forms of window opening in board hotels, PHOENICS software and CFD technology were used to simulate a variety of indoor wind environment. The open area, height of window sill, window form, position and shape of the window were varied for the simulation. The freshness of the air, relative to the appropriate wind speed, and the number of ventilation in the bathroom were adopted to evaluate the strategy analysis of the ventilation from different forms of windows. Suggestion strategy was given according to different needs for specific window.

Application of CFD Simulations in Studying Outdoor Wind Environment in Different Community Building Layouts and Open Space Designs

2013 ◽  
Vol 433-435 ◽  
pp. 2317-2324
Author(s):  
Kang Li Wu ◽  
I An Hung ◽  
Hsien Te Lin
Keyword(s):  
Open Space ◽  
Cfd Simulation ◽  
Community Building ◽  
Cfd Simulations ◽  
Wind Environment ◽  
Study Region ◽  
Field Surveys ◽  
Building Layout ◽  
The Common ◽  
Tainan City

This study explored the ventilation conditions of community atriums for selected housing prototypes in Tainan City, Taiwan. Employing field surveys and CFD simulations, the atrium ventilation of the selected housing building layouts were studied and compared. Through the CFD simulation using the common wind direction in the autumn of the study region, this study found that among the four community building layouts selected, the atrium space of the double-side opening townhouse building layout has the best outdoor ventilation. In addition, the study also revealed that when the arrangement of the building layout and the openings of the atrium are coordinated with the local wind environment, the outdoor ventilation will be significantly improved. Finally, this paper provides suggestions for building layouts and the design of community open space in order to enhances the ventilation of community atrium and its user comfort.

Further Investigation upon the Water Movements in the English Channel. Drift-Bottle Experiments in the Summers of 1927, 1928 and 1929, with Critical Notes on Drift-Bottle Experiments in General.

1930 ◽  
Vol 17 (1) ◽  
pp. 241-275 ◽  
Author(s):  
J. N. Carruthers
Keyword(s):  
Wind Speed ◽  
North Sea ◽  
English Channel ◽  
The North ◽  
Different Types ◽  
The North Sea ◽  
The Common ◽  
Relationship Of ◽  
Great Simplicity ◽  
Simple Surface

In July–August of three different years common surface-floating bottles were set adrift at International Station E2 (49° 27' N.—4° 42' W.). With them, various types of drag-fitted bottles were also put out. The journeys accomplished are discussed, and the striking differences as between year and year in the case of the common surface floaters, and as between the different types in the same year, are commented upon in the light of the prevailing winds. An inter-relationship of great simplicity is deduced between wind speed and the rate of travel of simple surface floating bottles up-Channel and across the North Sea from the results of experiments carried out in four different summers.

Reconstruction Strategy of a Data Center based on CFD Simulation of outdoor wind environment

2021 ◽  
Author(s):  
Gao Meng ◽  
Zhang Lubingbing ◽  
Lu Dongmei ◽  
Zhang Qingke ◽  
Wang Wanjiang
Keyword(s):  
Data Center ◽  
Cfd Simulation ◽  
Wind Environment ◽  
Reconstruction Strategy

Computer Analysis of S822 Aerofoil Section for Blades of Small Wind Turbines at Low Wind Speed

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Prachi R. Prabhukhot ◽  
Aditya R. Prabhukhot
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Cfd Simulation ◽  
Maximum Velocity ◽  
Small Scale ◽  
Blade Profile ◽  
Ansys Fluent ◽  
Low Wind Speed ◽  
Upward Direction ◽  
Computational Fluid Dynamics Cfd

The power generated in wind turbine depends on wind speed and parameters of blade geometry like aerofoil shape, blade radius, chord length, pitch angle, solidity, etc. Aerofoil selection is the crucial factor in establishing the efficient wind turbine. More than one aerofoil in a blade can increase the efficiency further. Previous studies of different aerofoils have shown that efficiency of small scale wind turbine increases when NREL S822 aerofoil is used for wind speed on and above 10 m/s. This paper introduces a study on effect of low wind speed (V = 5 m/s) on performance of blade profile. Aerofoils NREL S822/S823 are used for microwind turbine with S823 near root and S822 near tip. Blade of 3 m radius with spherical tubercles over entire span is analyzed considering 5 deg angle of attack. The computational fluid dynamics (CFD) simulation was carried out using ANSYS fluent to study the behavior of blade profile at various contours. The study shows that blade experiences maximum turbulence and minimum pressure near trailing edge of the tip of blade. The region also experiences maximum velocity of the flow. These factors result in pushing the aerofoil in upward direction for starting the wind turbine to rotate at the speed as low as 5 m/s.

Research on the Influence of Building Layout Forms on Wind Environment in Urumqi City Based on CFD Simulation

2021 ◽  
Author(s):  
Meng Gao ◽  
Lubingbing Zhang ◽  
Pingan Ni ◽  
Yongwang Zhang ◽  
Wanjiang Wang
Keyword(s):  
Cfd Simulation ◽  
Wind Environment ◽  
Building Layout

The Common Highway

2018 ◽  
pp. 74-106
Author(s):  
Jason W. Smith
Keyword(s):  
Wind Speed ◽  
Scientific Community ◽  
Physical Geography ◽  
Ocean Temperature ◽  
Maritime Culture ◽  
The Common ◽  
Ship Tracks ◽  
Theoretical Science ◽  
Maritime Community ◽  
The U.S

This chapter examines the hydrographic work of the U.S. Naval Observatory and Hydrographical Office under the leadership of Lieutenant Matthew Fontaine Maury, 1842-1861, a tenure in which Maury brought the Navy to the forefront of antebellum American applied and theoretical science and embarked upon revolutionary new cartographic conventions in his Wind and Current Charts series. Maury pushed and considerably expanded the boundaries of the hydrographic chart to include wind speed, ocean temperature, ship tracks, and whales, among other things, creating a partnership with American and foreign mariners to collect and systematize data about the marine environment thereby significantly shortening the length of voyages under sail, and breaking down the rule-of-thumb navigational methods deeply-rooted in maritime culture. With Maury’s publication of The Physical Geography of the Sea in 1855, he became the intellectual and political rival and sometime enemy of key leaders in the American civilian scientific community. Nevertheless, this chapter argues that at a time when the U.S. Navy, the American maritime community, and civilian science were diverging, Maury was just the sort of figure who could bridge increasingly widening intellectual, cultural, and institutional gaps between them.

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

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 406 ◽  
Author(s):  
Xiaoyu Ying ◽  
Yanling Wang ◽  
Wenzhe Li ◽  
Ziqiao Liu ◽  
Grace Ding
Keyword(s):  
Natural Ventilation ◽  
Cfd Simulation ◽  
Simulation Software ◽  
Office Building ◽  
Wind Environment ◽  
Site Model ◽  
Advantages And Disadvantages ◽  
Building Layout ◽  
Ventilation Performance ◽  
Group Layout

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.

scholarly journals Characteristics of the Wind Environment above Bridge Deck near the Pylon Zone and Wind Barrier Arrangement Criteria

2020 ◽  
Vol 10 (4) ◽  
pp. 1437 ◽  
Author(s):  
Dalei Wang ◽  
Yiquan Zhang ◽  
Mengjin Sun ◽  
Airong Chen
Keyword(s):  
Wind Speed ◽  
Evaluation Method ◽  
Bridge Deck ◽  
Sudden Change ◽  
Safety Evaluation ◽  
Longitudinal Direction ◽  
Optimal Arrangement ◽  
Wind Environment ◽  
Wind Barrier ◽  
Sutong Bridge

Due to the complex arrangement of structural components in the vicinity of bridge pylon zones, the wind environment above bridge decks is very complicated. A sudden change in wind speed exerts an adverse effect on vehicle control stability. In order to investigate the characteristics of the flow field in the vicinity of the bridge pylon, the wind environment near an inverted Y-shaped pylon is studied by experimental and numerical methods. From the flow visualization and the wind speed measurement in the wind tunnel and the numerical simulation created using Fluent software, specific patterns of the direction and magnitude of wind speed at a range of vehicle height above the bridge deck near the pylon zone were observed along the longitudinal direction. This distribution pattern of the wind environment can effectively guide the wind barrier arrangement near the bridge pylon zone. Combined with the two safety evaluation indicators proposed in this paper, the optimal arrangement scheme of wind barriers in the bridge pylon zone of Sutong Bridge is determined. This paper deepens the understanding of the wind environment near the pylon zone and proposes an evaluation method for the wind environment near the pylon zone, which can serve as the basis for wind barrier arrangement in similar research projects.

scholarly journals Analysis of the Wind Environment to Improve the Thermal Comfort in the Colonnade Space of a Qilou Street Based on the Relative Warmth Index

2019 ◽  
Vol 11 (16) ◽  
pp. 4402 ◽  
Author(s):  
Xianfeng Huang ◽  
Zhen Lu ◽  
Zhixiang Zhuang
Keyword(s):  
Wind Speed ◽  
Thermal Comfort ◽  
Architectural Design ◽  
Thermal Environment ◽  
Transitional Space ◽  
Wind Environment ◽  
Warmth Index ◽  
Research Findings ◽  
Building Components ◽  
Computational Fluid Dynamics Cfd

By analyzing measurements of the thermal environment of a qilou (arcade building) street, this study used the relative warmth index (RWI) to evaluate the thermal comfort in the colonnade space of a qilou. The analysis of the influence of the temperature, humidity, and wind speed on the thermal comfort in the colonnade space of a qilou street was conducted, and it was shown that the ambient wind speed had a strong influence on the RWI, indicating that a proper increase in the wind speed positively affected thermal comfort in this space. Then, this study also analyzed the effects of different forms of qilou streets on the wind environment by employing computational fluid dynamics (CFD) and summarized the architectural design measures that can improve the thermal comfort, including adopting back chamfer, street gaps, and the appropriate sizing of building components. It was concluded that the wind environment of a qilou could be optimized in terms of these measures, and the average RWI value decreased by 0.06, effectively enhancing the thermal comfort in the colonnade space. The research findings are applicable toward designing a thermally comfortable environment in the transitional space.

scholarly journals A study on wind speed correction method of lattice tower mast using CFD simulation

2018 ◽  
Vol 84 (862) ◽  
pp. 18-00042-18-00042
Author(s):  
Nobutoshi NISHIO ◽  
Shinichi INABA ◽  
Yuta YOSHIDA ◽  
Akihiro SATO ◽  
Tsuyoshi TAMUKAI ◽  
...  
Keyword(s):  
Wind Speed ◽  
Cfd Simulation ◽  
Correction Method ◽  
Lattice Tower
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