Qun Wang

TL;DR: In this paper, the authors employed computational fluid dynamic simulations with RNG k-e model to investigate the flow, and passive pollutant dispersion within scale-model two-dimensional street canyons.

TL;DR: In this paper, the authors investigated the effect of shape on the urban heat island (UHI) effect and found that strong UHIs prefer stable background conditions, while the Nusselt number is significantly lower in a stable environment than in a neutral environment.

TL;DR: Wang et al. as discussed by the authors investigated two such outbreaks of COVID-19 in Hong Kong, identified the probable role of chimney effect-induced airflow in a building drainage system in the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), and injected tracer gas (SF6) into the drainage stacks via the water closet of the index case.

TL;DR: In this article, the authors studied the urban heat island circulations and other local atmospheric circulations over Beijing and Tianjin during a severe UHI event in 2012 and found that the presence of either of those urban areas modified the penetration of the sea-breeze circulation.

TL;DR: In this paper, two distinct wind regimes are found depending on the ratio of the horizontal convective scale velocity to the background velocity, referred to as the buoyancy velocity ratio, and coherent asymmetric vortex rings are exhibited, similar to the UHIC structure under calm conditions.