Search Results - "Chun-Ho Liu"

A review of strategies for mitigating roadside air pollution in urban street canyons by Huang, Yuhan, Lei, Chengwang, Liu, Chun-Ho, Perez, Pascal, Forehead, Hugh, Kong, Shaofei, Zhou, John L.

“…Urban street canyons formed by high-rise buildings restrict the dispersion of vehicle emissions, which pose severe health risks to the public by aggravating…”
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High-frequency fluctuation of air temperature during a heatwave event in urban environment and the physical mechanism behind by Du, Ruiqing, Liu, Chun-Ho, Liu, Yixun

“…Heatwaves threaten human health and power systems. Urban climate is non-stationary and wide-spectrum, with high-frequency temperature and wind-speed variations…”
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Effect of local climate zone (LCZ) and building category (BC) classification on the simulation of urban climate and air-conditioning load in Hong Kong by Du, Ruiqing, Liu, Chun-Ho, Li, Xian-Xiang, Lin, Chuan-Yao

“…Reliable energy models are required to predict urban-scale air-conditioning (AC) load under extreme outdoor temperatures which is crucial to power security. In…”
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Wavelet analysis of the atmospheric flows over real urban morphology by Liu, Yixun, Liu, Chun-Ho, Brasseur, Guy P., Chao, Christopher Y.H.

“…Winds are the basic forces for atmospheric transport such as pollutant removal and pedestrian thermal comfort. The transport capability is commonly measured in…”
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Inertial and roughness sublayer flows over real urban morphology: A comparison of wind tunnel experiment and large-eddy simulation by Mo, Ziwei, Liu, Chun-Ho

“…Turbulent flows in the inertial sublayer (ISL) and the roughness sublayer (RSL) are highly complicated by real urban surfaces with various building heights and…”
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On the Flow Response to an Abrupt Change in Surface Roughness by Li, Wenye, Liu, Chun-Ho

“…Aerodynamic resistance changes in the atmospheric surface layers (ASLs), such as coastal zones and rural–urban interface, complicate the transport processes…”
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Dust resuspension from fabrics exposed to airflow by Feng, Jie, Lai, Tsz Wai, Fu, Sau Chung, Chan, Ka Chung, Liu, Chun-Ho, Chao, Christopher Y.H.

“…Dust resuspension from four typical fabrics (cotton, linen, silk, and polyester) exposed to airflow with common velocities within 0-10 m/s, including a moving…”
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Study of Urban Thermal Environment and Local Circulations of Guangdong‐Hong Kong‐Macao Greater Bay Area Using WRF and Local Climate Zones by Xin, Rui, Li, Xian‐Xiang, Shi, Yurong, Li, Lei, Zhang, Yuejuan, Liu, Chun‐Ho, Dai, Yongjiu

“…The Guangdong‐Hong Kong‐Macao Greater Bay Area (GBA), a cluster of world‐class cities, is undergoing rapid urbanization. However, the heterogeneity of the…”
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Coupled mesoscale-microscale modeling of air quality in a polluted city using WRF-LES-Chem by Wang, Yuting, Ma, Yong-Feng, Muñoz-Esparza, Domingo, Dai, Jianing, Li, Cathy Wing Yi, Lichtig, Pablo, Tsang, Roy Chun-Wang, Liu, Chun-Ho, Wang, Tao, Brasseur, Guy Pierre

“…To perform realistic high-resolution air quality modeling in a polluted urban area, the Weather Research and Forecasting (WRF) model is used with an embedded…”
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Pedestrian wind comfort near a super-tall building with various configurations in an urban-like setting by Zhang, Xinyue, Weerasuriya, Asiri Umenga, Zhang, Xuelin, Tse, Kam Tim, Lu, Bin, Li, Cruz Yutong, Liu, Chun-Ho

“…Pedestrian wind comfort near a 400 m super-tall building in high and low ambient wind speeds, referred to as Windy and Calm climates, is evaluated by…”
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Large-eddy simulation of turbulent transports in urban street canyons in different thermal stabilities by Cheng, W.C., Liu, Chun-Ho

“…Five sets of large-eddy simulations (LES) were performed to examine the characteristics of flows and pollutant dispersion in two-dimensional (2D) urban street…”
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Temporal Evolution of Vehicle Exhaust Plumes in a Congested Street Canyon Environment by Meng-Yuan Chu, Peter Brimblecombe, Peng Wei, Chun-Ho Liu, Zhi Ning

“…Air pollutants from traffic make an important contribution to human exposure, with pedestrians likely to experience rapid fluctuation and high concentrations…”
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Large-Eddy Simulation of Flow and Pollutant Transports in and Above Two-Dimensional Idealized Street Canyons by Cheng, W. C., Liu, Chun-Ho

“…A large-eddy simulation (LES) model, using the one-equation subgrid-scale (SGS) parametrization, was developed to study the flow and pollutant transport in and…”
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Association between NO2 concentrations and spatial configuration: a study of the impacts of COVID-19 lockdowns in 54 US cities by Wong, Man Sing, Zhu, Rui, Yin Tung Kwok, Coco, Kwan, Mei-Po, Santi, Paolo, Ho Liu, Chun, Qin, Kai, Lee, Kwon Ho, Heo, Joon, Li, Hon, Ratti, Carlo

“…The massive lockdown of global cities during the COVID-19 pandemic is substantially improving the atmospheric environment, which for the first time, urban…”
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NOx and CO Fluctuations in a Busy Street Canyon by Peter Brimblecombe, Meng-Yuan Chu, Chun-Ho Liu, Zhi Ning

“…Busy street canyons can have a large flow of vehicles and reduced air exchange and wind speeds at street level, exposing pedestrians to high pollutant…”
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Impact of building facades and ground heating on wind flow and pollutant transport in street canyons by Xie, Xiaomin, Liu, Chun-Ho, Leung, Dennis Y.C.

“…This paper investigates the impacts of building facades and ground heating on the wind flow and pollutant transport in street canyons using the computational…”
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Numerical investigation of pollutant transport characteristics inside deep urban street canyons by Li, Xian-Xiang, Liu, Chun-Ho, Leung, Dennis Y.C.

“…A validated LES model was employed to simulate the street canyons of aspect ratio (AR) 3, 5, and 10. Three, five, and eight vertically aligned primary…”
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Physio-chemical modeling of the NOx-O3 photochemical cycle and the air pollutants’ reactive dispersion around an isolated building by Fu, Yunfei, Lin, Xisheng, Zheng, Xing, Wang, Liangzhu, Liu, Chun-Ho, Zhang, Xuelin, Li, Cruz Y., Tse, K. T.

“…A numerical physio-chemical model of the NO x -O 3 photochemical cycle in the near-wake region of an isolated residential/office building has been presented in…”
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Impact of Lockdowns on Air Pollution: Case Studies of Two Periods in 2022 in Guangzhou, China by Zhao, Xinlei, Li, Xian-Xiang, Xin, Rui, Zhang, Yuejuan, Liu, Chun-Ho

“…The photochemical mechanisms of ozone (O3) formation are complex, and simply reducing nitrogen oxide (NOx) emissions is insufficient to reduce O3…”
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The simulation of the multi-pass and die-less spinning process by Liu, Chun-Ho

“…In the ending of the twenty century, the numerical simulations of metal forming are developed rapidly and widely, while the simulation of conventional spinning…”
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