Effect of moving vehicles on pollutant dispersion in street canyon by using dynamic mesh updating method

Wang, Qiankun; Fang, Weijie; Richter, Renaud de; Peng, Chong; Ming, Tingzhen

doi:10.1016/j.jweia.2019.01.014

Cited by 38 publications

(10 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang et al [137] studied vehicle-induced turbulence using dynamic mesh technology. The moving vehicles were assumed to have the same geometric shape (4 m length, 1.6 m width, and 1.4 m height), representing a small passenger car in China.…”

Section: Vehicle Speedmentioning

confidence: 99%

Review on pollutant dispersion in urban areas-part A: Effects of mechanical factors and urban morphology

Ming

Liu

et al. 2021

Building and Environment

Self Cite

View full text Add to dashboard Cite

Section: Vehicle Speedmentioning

confidence: 99%

Review on pollutant dispersion in urban areas-part A: Effects of mechanical factors and urban morphology

Ming

Liu

et al. 2021

Building and Environment

Self Cite

View full text Add to dashboard Cite

“…The dimensions of the car model were identical to those of a real Proton Saga. The wheels were not included in the simplified model as the flow field was small, and thus, the influence of the wheels could be ignored in the simulation [11]. The overall dimensions of the car were 4.3m × 1.7m × 1.5m (length × width × height).…”

Section: Modelling Of Carmentioning

confidence: 99%

Performance Analysis of Highway Wind Turbine Enhanced with Wind Guide Vanes Using the Taguchi Method

Mazlan

Zawawi

Tahzib

et al. 2021

CFDL

View full text Add to dashboard Cite

Considerable efforts have been made by researchers to study the interaction between moving vehicles and wind turbines. The Savonius vertical-axis wind turbine was chosen due to its effectiveness in low-wind speed conditions. Speeding vehicles produce a scattered and non-uniform wind flow with disturbances. Hence, to prevent a negative torque, a row of wind guide vane panels was arranged in front of the blades of a wind turbine. The wind guide vane had the shape of an NACA4412 aerofoil to reduce the loss of wind energy, and to further increase wind velocity. A number of CFD simulations were designed using the Taguchi method to determine the optimum conditions for the power coefficient of the wind turbine in terms of the effects of three factors, namely, the distance between the guide vanes (d), the angle of the guide vanes (?), and the speed of the moving car (VC). An orthogonal array of L9(33) was designed. In addition, to observe the effects of the wind velocity induced by the moving vehicle, the wind turbine was incorporated with one degree of freedom (1DOF). The results showed that the speed of the moving car played a major role in determining the power coefficient. The order of influence of each factor was ranked as VC > ? > d. The performance of the wind turbine was sensitive to the speed of the car and the angle of the guide vanes, whereas it was insensitive to the distance between the guide vanes. Furthermore, the analysis of the signal-to-noise (S/N) ratio suggested that the optimal combination of factors for a maximum power coefficient were d = 0.4m, ? = 30°, and VC =30m/s. The optimum setting increased the Cp to 26% compared to the Cp that was produced without the installation of the guide vanes.

show abstract

“…CFD simulations, under the premises of validation by the first two methods, are more and more applied to study the dispersion of traffic pollutants in street canyons because of their economical, comprehensive data and less constrained by external conditions. Previous numerical simulation studies focused on the investigation of effects of street-canyon geometry (Assimakopoulos et al 2003;Llaguno-Munitxa et al 2017), ambient wind direction/speed (Jeanjean et al 2015;Kwak et al 2016;Zhang et al 2018;Huang et al 2019a), traffic-induced turbulence (Sahlodin et al 2007;Solazzo et al 2016;Wang et al 2019), thermal conditions due to solar radiation (Allegrini et al 2014;Mei et al 2017;, and green infrastructure (Jeanjean et al 2015;Huang et al 2019b) on the flow and pollutant dispersion in street canyons.…”

Section: Introductionmentioning

confidence: 99%

Impacts of specific street geometry on airflow and traffic pollutant dispersion inside a street canyon

Huang

Ren

et al. 2021

Air Qual Atmos Health

View full text Add to dashboard Cite

In this study, a validated CFD model is used to analyze the flow field and pollutant distribution in an isolated canyon (street aspect ratio, W/H = 1) by considering different street categories and arrangements of void deck under a perpendicular inflow wind. The results reveal that the street geometry affects significantly the in-canyon flow structures and thus the pollutant distributions. Comparing with the regular street canyon (a main clockwise vortex is obtained therein), the void deck can cause several vortices when a strong stream of air passes through the canyon. It is the most conducive to pollutant removal for the void decks at both buildings, while the construction with void deck at the upstream building causes pollutant accumulation on the windward side. Moreover, a larger high-pollution zone is generated above the elevated road due to the wind recirculation therein, and for the two-level street and the street with depressed road, the weak wind leads to the accumulation of traffic pollutants in the underground space. This study will provide technical support for urban street planning and design to alleviate traffic pollution.

show abstract

Effect of moving vehicles on pollutant dispersion in street canyon by using dynamic mesh updating method

Cited by 38 publications

References 55 publications

Review on pollutant dispersion in urban areas-part A: Effects of mechanical factors and urban morphology

Review on pollutant dispersion in urban areas-part A: Effects of mechanical factors and urban morphology

Performance Analysis of Highway Wind Turbine Enhanced with Wind Guide Vanes Using the Taguchi Method

Impacts of specific street geometry on airflow and traffic pollutant dispersion inside a street canyon

Contact Info

Product

Resources

About