Pedestrian Level Turbulent Wind Flow around an Elevated Building

Jianlin Liu, Jianlei Niu, Cheuk Ming Mak, Qian Xia

Research output: Journal article publicationConference articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Published by Elsevier Ltd. Wind flow turbulence plays a critical role in the pedestrian level wind environment, particularly for the airflow around buildings with specific architectural features. The elevated design, a feature was proved to improve the pedestrian level weak wind conditions in high-density cities in our earlier study. This present study aims to further investigate the pedestrian level wind flow turbulence in an elevated building surrounding. The predictions were conducted by comparing the CFD simulation and a wind tunnel experiment. Specifically, the Detached Eddy Simulation (DES), the Steady-state and the Unsteady-state RANS (SRANS and URANS), were assessed. The effects of mesh resolutions and inflow fluctuating algorithms on the performance of the DES model were thoroughly evaluated. DES can better reproduce the mean flow fields than the other two models. The unsteady flow fluctuations around the elevated building are analyzed with energy spectral density. Meanwhile, the periodical wind flow fields around the elevated building are accurately obtained.
Original languageEnglish
Pages (from-to)1004-1010
Number of pages7
JournalProcedia Engineering
Volume205
DOIs
Publication statusPublished - 1 Jan 2017
Event10th International Symposium on Heating, Ventilation and Air Conditioning, ISHVAC 2017 - Jinan, China
Duration: 19 Oct 201722 Oct 2017

Keywords

  • CFD simulation
  • DES (Detached eddy simulation)
  • Elevated building
  • Pedestrian level wind (PLW)
  • Unsteady-state RANS (URANS)

ASJC Scopus subject areas

  • Engineering(all)

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