Les analysis of impact of non-uniformity of building height in highly dense urban district on wind environment (part 1): Quantitative evaluation of drag force of urban district and streamwise momentum transport

Yasuyuki Ishida, Yoshinobu Endo, Akashi Mochida, Taichi Shirasawa, Ryuichiro Yoshie, Hideyuki Tanaka

Research output: Contribution to journalArticlepeer-review

Abstract

Non-uniformity of building height has the effect of improving the quality of outdoor environment by increasing wind velocity at the pedestrian-level within a focused urban district. However, the urban district with non-uniform height causes more momentum loss of streamwise wind than an urban district with uniform height. Consequently this leads to decreased wind velocity in leeward areas of the focused area. In this study, LESs were applied to flowfields in two districts consisting of rectangular buildings with uniform and non-uniform heights, and the influence of the non-uniformity on drag force of urban district and streamwise momentum transport was quantitatively evaluated.

Original languageEnglish
Pages (from-to)1005-1015
Number of pages11
JournalJournal of Environmental Engineering (Japan)
Volume85
Issue number778
DOIs
Publication statusPublished - 2020 Dec

Keywords

  • Drag force
  • Highly dense urban district
  • Large-eddy simulation
  • Momentum transport
  • Non-uniformity of building height

ASJC Scopus subject areas

  • Environmental Engineering

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