Pollutant dispersion simulation for low wind speed condition by the ILS method

Low airflow or poor outdoor ventilation around building blocks can negatively influence pollutant dispersion in the surroundings and indoor air quality, and increase the risks of airborne transmission of infectious diseases. However, there have been few studies addressing the wind environment, thermal comfort and other concerns at the pedestrian level. Buildings with a lift-up design may have a number of impacts on the pedestrian-level wind and thermal environments. Three building configurations that resulted in the lowest wind speed zones were identified from a previous study. A 3.5 m high open ground floor was added to each of the three configurations, and scale models of the three designs were studied in a wind tunnel to assess their influences on airflow and ventilation around the buildings. Undesirable areas of low wind speed leading to poor air ventilation and, on the other side of extreme, areas of discomfort due to strong wind conditions were both identified, and their practical implications are discussed.

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Performance Investigation of A Mix Wind Turbine Using A Clutch Mechanism At Low Wind Speed Condition

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/217/1/012020 ◽

2017 ◽

Vol 217 ◽

pp. 012020 ◽

Cited By ~ 2

Author(s):

M J Jamanun ◽

M S Misaran ◽

M Rahman ◽

W K Muzammil

Keyword(s):

Wind Speed ◽

Wind Turbine ◽

Speed Condition ◽

Low Wind Speed ◽

Clutch Mechanism

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Performance prediction of asymmetrical bladed H-Darrieus VAWT rotors in low wind speed condition using CFD

10.1063/1.5032002 ◽

2018 ◽

Cited By ~ 1

Author(s):

Hussain Mahamed Sahed Mostafa Mazarbhuiya ◽

Agnimitra Biswas ◽

Kaushal Kumar Sharma

Keyword(s):

Wind Speed ◽

Performance Prediction ◽

Speed Condition ◽

Low Wind Speed

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Simulation on Computational Fluid Dynamics of Flow Field and Pollutant Dispersion in Block of Buildings

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.327.250 ◽

2013 ◽

Vol 327 ◽

pp. 250-255

Author(s):

Rong Huang ◽

Kai Hua Li ◽

Bo Wang

Keyword(s):

Fluid Dynamics ◽

Wind Speed ◽

Motor Vehicle ◽

Flow Distribution ◽

Pollutant Dispersion ◽

Vehicle Exhaust ◽

Low Wind Speed ◽

The Social ◽

Opposite Situation ◽

Pollutants Dispersion

With the social development, motor vehicle exhaust has become a major source of pollution in the city today, so it is necessary to research the effect of the wind field around buildings and pollutants dispersion on human health. In this paper, we using Fluid Dynamics method to simulate the pollutants dispersion under different wind direction. The results showed that the maximum wind speed of the buildings in the same horizontal plane appeared in the entrance of the street. When the inflow velocity, wind directions are different, the air flow distribution is different in group of buildings. Pollutants are prone to accumulate in the place of low wind speed, atmospheric instability, and weak turbulence intensity. The concentration of pollutants from lower to upper gradually reduced, but it will appear opposite situation in the vortex.

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