Large eddy simulation of wind flow through an urban environment in its full-scale wind tunnel models

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Wind flow through urban areas is studied either by wind tunnel scale experiments or via computational fluid dynamics simulations through full-scale actual models. The large difference between the Reynolds numbers based on the geometries of actual cities and wind tunnel scale cities makes the dynamic similarity between the two models uncertain. In this study, the mean and turbulent flow parameters were investigated using a large eddy simulation for two models i.e. the actual urban area model and the wind tunnel scale (1:1000) model. Kuala Lumpur City Centre, Malaysia, was considered as the case study of an urban area. Vertical velocity profiles were plotted at five locations representing different building packing densities. The results of wind tunnel scale model largely agreed with the actual model with some discrepancies in the building vicinity and wakes. The dissimilarity of the wake patterns due to the large difference in Re was responsible for the deviations. Largest discrepancies were found in the lateral and wall-normal velocity components and turbulence stresses. The results casted a shadow on the applicability of the conclusions derived from the simulations on wind tunnel scale models to the actual urban environments they represented. The deviation between the two models should be assessed before proceeding with experimental or numerical simulations on small-sized models.

Original languageEnglish
Pages (from-to)2665-2678
Number of pages14
JournalJournal of Mechanical Engineering and Sciences
Volume11
Issue number2
DOIs
Publication statusPublished - 1 Jun 2017

Fingerprint

Large eddy simulation
Wind tunnels
Computer simulation
Turbulent flow
Computational fluid dynamics
Reynolds number
Turbulence
Geometry

Keywords

  • Atmospheric flow
  • Dynamic similarity
  • Full-scale model
  • Les
  • Turbulence
  • Wind tunnel model

ASJC Scopus subject areas

  • Computational Mechanics
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

@article{a7a382f0a88f4ebf9fca50496f92540d,
title = "Large eddy simulation of wind flow through an urban environment in its full-scale wind tunnel models",
abstract = "Wind flow through urban areas is studied either by wind tunnel scale experiments or via computational fluid dynamics simulations through full-scale actual models. The large difference between the Reynolds numbers based on the geometries of actual cities and wind tunnel scale cities makes the dynamic similarity between the two models uncertain. In this study, the mean and turbulent flow parameters were investigated using a large eddy simulation for two models i.e. the actual urban area model and the wind tunnel scale (1:1000) model. Kuala Lumpur City Centre, Malaysia, was considered as the case study of an urban area. Vertical velocity profiles were plotted at five locations representing different building packing densities. The results of wind tunnel scale model largely agreed with the actual model with some discrepancies in the building vicinity and wakes. The dissimilarity of the wake patterns due to the large difference in Re was responsible for the deviations. Largest discrepancies were found in the lateral and wall-normal velocity components and turbulence stresses. The results casted a shadow on the applicability of the conclusions derived from the simulations on wind tunnel scale models to the actual urban environments they represented. The deviation between the two models should be assessed before proceeding with experimental or numerical simulations on small-sized models.",
keywords = "Atmospheric flow, Dynamic similarity, Full-scale model, Les, Turbulence, Wind tunnel model",
author = "E. Reda and Rozli Zulkifli and Zambri Harun",
year = "2017",
month = "6",
day = "1",
doi = "10.15282/jmes.11.2.2017.9.0243",
language = "English",
volume = "11",
pages = "2665--2678",
journal = "Journal of Mechanical Engineering and Sciences",
issn = "2289-4659",
publisher = "Faculty of Mechanical Engineering, Universiti Malaysia Pahang",
number = "2",

}

TY - JOUR

T1 - Large eddy simulation of wind flow through an urban environment in its full-scale wind tunnel models

AU - Reda, E.

AU - Zulkifli, Rozli

AU - Harun, Zambri

PY - 2017/6/1

Y1 - 2017/6/1

N2 - Wind flow through urban areas is studied either by wind tunnel scale experiments or via computational fluid dynamics simulations through full-scale actual models. The large difference between the Reynolds numbers based on the geometries of actual cities and wind tunnel scale cities makes the dynamic similarity between the two models uncertain. In this study, the mean and turbulent flow parameters were investigated using a large eddy simulation for two models i.e. the actual urban area model and the wind tunnel scale (1:1000) model. Kuala Lumpur City Centre, Malaysia, was considered as the case study of an urban area. Vertical velocity profiles were plotted at five locations representing different building packing densities. The results of wind tunnel scale model largely agreed with the actual model with some discrepancies in the building vicinity and wakes. The dissimilarity of the wake patterns due to the large difference in Re was responsible for the deviations. Largest discrepancies were found in the lateral and wall-normal velocity components and turbulence stresses. The results casted a shadow on the applicability of the conclusions derived from the simulations on wind tunnel scale models to the actual urban environments they represented. The deviation between the two models should be assessed before proceeding with experimental or numerical simulations on small-sized models.

AB - Wind flow through urban areas is studied either by wind tunnel scale experiments or via computational fluid dynamics simulations through full-scale actual models. The large difference between the Reynolds numbers based on the geometries of actual cities and wind tunnel scale cities makes the dynamic similarity between the two models uncertain. In this study, the mean and turbulent flow parameters were investigated using a large eddy simulation for two models i.e. the actual urban area model and the wind tunnel scale (1:1000) model. Kuala Lumpur City Centre, Malaysia, was considered as the case study of an urban area. Vertical velocity profiles were plotted at five locations representing different building packing densities. The results of wind tunnel scale model largely agreed with the actual model with some discrepancies in the building vicinity and wakes. The dissimilarity of the wake patterns due to the large difference in Re was responsible for the deviations. Largest discrepancies were found in the lateral and wall-normal velocity components and turbulence stresses. The results casted a shadow on the applicability of the conclusions derived from the simulations on wind tunnel scale models to the actual urban environments they represented. The deviation between the two models should be assessed before proceeding with experimental or numerical simulations on small-sized models.

KW - Atmospheric flow

KW - Dynamic similarity

KW - Full-scale model

KW - Les

KW - Turbulence

KW - Wind tunnel model

UR - http://www.scopus.com/inward/record.url?scp=85042755727&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85042755727&partnerID=8YFLogxK

U2 - 10.15282/jmes.11.2.2017.9.0243

DO - 10.15282/jmes.11.2.2017.9.0243

M3 - Article

VL - 11

SP - 2665

EP - 2678

JO - Journal of Mechanical Engineering and Sciences

JF - Journal of Mechanical Engineering and Sciences

SN - 2289-4659

IS - 2

ER -