Comparison of les and durbin type k-ε model for gas diffusion in weak wind region behind a building

Taichi Shirasawa; Yoshinobu Endo; Ryuichiro Yoshie; Akashi Mochida; Hideyuki Tanaka

doi:10.3130/aije.73.615

Comparison of les and durbin type k-ε model for gas diffusion in weak wind region behind a building

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

ENG - Architecture and Building Science

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Flow and diffusion fields around a building were predicted by LES and Durbin type k-ε model. The prediction accuracy of the both models was assessed by comparing their results with those obtained by wind tunnel test. The results of LES showed good agreement with experimental data in terms of mean wind velocity, turbulence statistics and mean gas concentration, while the significant differences were observed between the results of the experiment and the Durbin type k-ε model concerning the flow and diffusion fields in the wake region behind the building. This is mainly due to the fact that the periodic motions caused by the vortex shedding were not reproduced by this model.

Original language	English
Pages (from-to)	615-622
Number of pages	8
Journal	Journal of Environmental Engineering
Volume	73
Issue number	627
DOIs	https://doi.org/10.3130/aije.73.615
Publication status	Published - 2008 May

Keywords

High rise building
Large eddy simulation
Pollutant diffusion
Turbulent diffusion flux
Vortex shedding
Wind tunnel experiment

ASJC Scopus subject areas

Environmental Engineering

Access to Document

10.3130/aije.73.615

Fingerprint Dive into the research topics of 'Comparison of les and durbin type k-ε model for gas diffusion in weak wind region behind a building'. Together they form a unique fingerprint.

Cite this

@article{b0d1ef773c194727be22235385624ca5,

title = "Comparison of les and durbin type k-ε model for gas diffusion in weak wind region behind a building",

abstract = "Flow and diffusion fields around a building were predicted by LES and Durbin type k-ε model. The prediction accuracy of the both models was assessed by comparing their results with those obtained by wind tunnel test. The results of LES showed good agreement with experimental data in terms of mean wind velocity, turbulence statistics and mean gas concentration, while the significant differences were observed between the results of the experiment and the Durbin type k-ε model concerning the flow and diffusion fields in the wake region behind the building. This is mainly due to the fact that the periodic motions caused by the vortex shedding were not reproduced by this model.",

keywords = "High rise building, Large eddy simulation, Pollutant diffusion, Turbulent diffusion flux, Vortex shedding, Wind tunnel experiment",

author = "Taichi Shirasawa and Yoshinobu Endo and Ryuichiro Yoshie and Akashi Mochida and Hideyuki Tanaka",

year = "2008",

month = may,

doi = "10.3130/aije.73.615",

language = "English",

volume = "73",

pages = "615--622",

journal = "Journal of Environmental Engineering, ASCE",

issn = "1348-0685",

publisher = "American Society of Civil Engineers (ASCE)",

number = "627",

}

TY - JOUR

T1 - Comparison of les and durbin type k-ε model for gas diffusion in weak wind region behind a building

AU - Shirasawa, Taichi

AU - Endo, Yoshinobu

AU - Yoshie, Ryuichiro

AU - Mochida, Akashi

AU - Tanaka, Hideyuki

PY - 2008/5

Y1 - 2008/5

N2 - Flow and diffusion fields around a building were predicted by LES and Durbin type k-ε model. The prediction accuracy of the both models was assessed by comparing their results with those obtained by wind tunnel test. The results of LES showed good agreement with experimental data in terms of mean wind velocity, turbulence statistics and mean gas concentration, while the significant differences were observed between the results of the experiment and the Durbin type k-ε model concerning the flow and diffusion fields in the wake region behind the building. This is mainly due to the fact that the periodic motions caused by the vortex shedding were not reproduced by this model.

AB - Flow and diffusion fields around a building were predicted by LES and Durbin type k-ε model. The prediction accuracy of the both models was assessed by comparing their results with those obtained by wind tunnel test. The results of LES showed good agreement with experimental data in terms of mean wind velocity, turbulence statistics and mean gas concentration, while the significant differences were observed between the results of the experiment and the Durbin type k-ε model concerning the flow and diffusion fields in the wake region behind the building. This is mainly due to the fact that the periodic motions caused by the vortex shedding were not reproduced by this model.

KW - High rise building

KW - Large eddy simulation

KW - Pollutant diffusion

KW - Turbulent diffusion flux

KW - Vortex shedding

KW - Wind tunnel experiment

UR - http://www.scopus.com/inward/record.url?scp=79951808640&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79951808640&partnerID=8YFLogxK

U2 - 10.3130/aije.73.615

DO - 10.3130/aije.73.615

M3 - Article

AN - SCOPUS:79951808640

VL - 73

SP - 615

EP - 622

JO - Journal of Environmental Engineering, ASCE

JF - Journal of Environmental Engineering, ASCE

SN - 1348-0685

IS - 627

ER -