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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