Modelling of pedestrian level wind environment on a high-quality mesh: A case study for the HKPolyU campus

Yaxing Du, Cheuk Ming Mak, Zhengtao Ai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)


Quality and efficiency of computational fluid dynamics (CFD) simulation of pedestrian level wind environment in a complex urban area are often compromised by many influencing factors, particularly mesh quality. This paper first proposes a systematic and efficient mesh generation method and then performs detailed sensitivity analysis of some important computational parameters. The geometrically complex Hong Kong Polytechnic University (HKPolyU) campus is taken as a case study. Based on the high-quality mesh system, the influences of three important computational parameters, namely, turbulence model, near-wall mesh density and computational domain size, on the CFD predicted results of pedestrian level wind environment are quantitatively evaluated. Validation of CFD models is conducted against wind tunnel experimental data, where a good agreement is achieved. It is found that the proposed mesh generation method can effectively provide a high-quality and high-resolution structural grid for CFD simulation of wind environment in a complex urban area.

Original languageEnglish
Pages (from-to)105-119
Number of pages15
JournalEnvironmental Modelling and Software
Publication statusPublished - 1 May 2018


  • Complex urban environment
  • Computational fluid dynamics (CFD) simulation
  • Mesh generation method
  • Pedestrian level wind environment
  • Sensitivity analysis

ASJC Scopus subject areas

  • Software
  • Environmental Engineering
  • Ecological Modelling

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