Effects of building lift-up design on pedestrian pollutant dispersion

Qian Xia, Xiaoping Liu, Jianlei Niu, K. C.S. Kwok

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


This study focuses on the pedestrian-level wind environment and pollutant dispersion from an upstream or downstream line source representing vehicular emission from a line of stopped buses. Buildings with a lift-up design may have a number of impacts on the pedestrian-level wind and pollutant dispersion environment. Three building configurations that resulted in the lowest wind speed zones were identified from a previous study. A 3.5 meter 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, ventilation and pollutant dispersion around the buildings. Undesirable areas of low wind speed and excessively high wind at the other extreme, pollutant dispersions from the respective line sources upstream and downstream were compared, and the practical implications to the wind and thermal comfort and pollutant dispersions are discussed.
Original languageEnglish
Title of host publicationIndoor Air 2014 - 13th International Conference on Indoor Air Quality and Climate
PublisherInternational Society of Indoor Air Quality and Climate
Number of pages8
Publication statusPublished - 1 Jan 2014
Event13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014 - Hong Kong, Hong Kong
Duration: 7 Jul 201412 Jul 2014


Conference13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014
Country/TerritoryHong Kong
CityHong Kong


  • Lift-up design
  • Line source
  • Pedestrian-level pollutant dispersion
  • Wind tunnel

ASJC Scopus subject areas

  • Pollution
  • Building and Construction
  • Health, Toxicology and Mutagenesis
  • Computer Science Applications

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