Dispersion Modelling in a Dense City – Microscale Transport among Buildings and Its Implication to a Healthy Environment
Speaker: Dr C.H. Liu Associate Professor, Department of Mechanical Engineering, HKU
Facilitator: Professor S.C. Wong Associate Dean (Development and External Relations), Faculty of Engineering, HKU
Date: 17 December, 2020 (Thursday)
Time: 18:00 – 19:00 (HK Time)
Medium of the talk: English
Via Zoom | Registration: https://bit.ly/39PCvp4
In this lecture, Dr Liu will share about the transport of constituents, such as heat, aerosol and bacteria, is a key component in atmospheric modeling. Mesoscale modelling is the current practice but is merely applicable to the microscale processes around the buildings in dense cities. The challenge is handling the broad spectra of motion scales induced by individual obstacles. In this talk, he will share the experience of using engineering computational fluid dynamics (CFD) to examine the effluent dispersion from a roof-level stack vent and its possibility of entrainment down to the lower floors. The collective effects of winds, buildings and topography on the transport processes are demonstrated to enrich our interpretation of the current practice. All are welcome!