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

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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
JournalEnvironmental Modelling & Software
Volume103
Pages (from-to)105-119
ISSN1364-8152
DOIs
Publication statusPublished - 2018

Keywords

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

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