Inflow condition sensitivity in the CFD simulation of wind flow in the urban environment

A. Ricci; I.M. Kalkman; B. Blocken; M. Burlando; A. Freda; M.P. Repetto

Inflow condition sensitivity in the CFD simulation of wind flow in the urban environment

A. Ricci, I.M. Kalkman, B. Blocken, M. Burlando, A. Freda, M.P. Repetto

Building Physics

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

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Abstract

Wind flow modeling in urban areas is influenced by many uncertainties, such as geometric detailing, inflow and boundary conditions, numerical approach (RANS, LES, and DNS) and turbulence model. This study aims to investigate how the different inflow conditions that are usually adopted to simulate urban wind flows may affect the accuracy of the results. CFD simulations were performed on a selected urban area - “Quartiere La Venezia” in Livorno (Italy) - using a steady-state RANS approach. Two types of inflow profiles were considered for one wind direction (α = 240° from the North). Wind tunnel tests performed on the same urban model were used as a benchmark to validate the numerical simulations. Mean wind profiles at 25 locations were compared and the statistical performance in terms of four different metrics was quantified for both inflow conditions. The results show that slightly different inflow conditions can greatly affect the results in terms of mean wind speed and turbulent kinetic energy.

Original language	English
Title of host publication	8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), 7-11 June 2016, Boston, USA
Pages	1-10
Number of pages	10
Publication status	Published - 2016
Event	8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), June 7-11, 2016, Northeastern University, Boston, Massachusetts, USA - Northeastern University, Boston, United States Duration: 7 Jun 2016 → 11 Jun 2016 Conference number: VIII http://www.northeastern.edu/bbaa8/

Conference

Conference	8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), June 7-11, 2016, Northeastern University, Boston, Massachusetts, USA
Abbreviated title	BBAA VIII
Country/Territory	United States
City	Boston
Period	7/06/16 → 11/06/16
Internet address	http://www.northeastern.edu/bbaa8/

Keywords

CFD
urban wind flow
inflow conditions
mean wind profiles
statistical performance

Cite this

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title = "Inflow condition sensitivity in the CFD simulation of wind flow in the urban environment",

abstract = "Wind flow modeling in urban areas is influenced by many uncertainties, such as geometric detailing, inflow and boundary conditions, numerical approach (RANS, LES, and DNS) and turbulence model. This study aims to investigate how the different inflow conditions that are usually adopted to simulate urban wind flows may affect the accuracy of the results. CFD simulations were performed on a selected urban area - “Quartiere La Venezia” in Livorno (Italy) - using a steady-state RANS approach. Two types of inflow profiles were considered for one wind direction (α = 240° from the North). Wind tunnel tests performed on the same urban model were used as a benchmark to validate the numerical simulations. Mean wind profiles at 25 locations were compared and the statistical performance in terms of four different metrics was quantified for both inflow conditions. The results show that slightly different inflow conditions can greatly affect the results in terms of mean wind speed and turbulent kinetic energy.",

keywords = "CFD, urban wind flow, inflow conditions, mean wind profiles, statistical performance",

author = "A. Ricci and I.M. Kalkman and B. Blocken and M. Burlando and A. Freda and M.P. Repetto",

year = "2016",

language = "English",

pages = "1--10",

booktitle = "8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), 7-11 June 2016, Boston, USA",

note = "8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), June 7-11, 2016, Northeastern University, Boston, Massachusetts, USA, BBAA VIII ; Conference date: 07-06-2016 Through 11-06-2016",

url = "http://www.northeastern.edu/bbaa8/",

}

Ricci, A, Kalkman, IM, Blocken, B, Burlando, M, Freda, A & Repetto, MP 2016, Inflow condition sensitivity in the CFD simulation of wind flow in the urban environment. in 8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), 7-11 June 2016, Boston, USA., 154, pp. 1-10, 8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), June 7-11, 2016, Northeastern University, Boston, Massachusetts, USA, Boston, United States, 7/06/16.

Inflow condition sensitivity in the CFD simulation of wind flow in the urban environment. / Ricci, A.; Kalkman, I.M.; Blocken, B. et al.
8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), 7-11 June 2016, Boston, USA. 2016. p. 1-10 154.

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

TY - CHAP

T1 - Inflow condition sensitivity in the CFD simulation of wind flow in the urban environment

AU - Ricci, A.

AU - Kalkman, I.M.

AU - Blocken, B.

AU - Burlando, M.

AU - Freda, A.

AU - Repetto, M.P.

N1 - Conference code: VIII

PY - 2016

Y1 - 2016

N2 - Wind flow modeling in urban areas is influenced by many uncertainties, such as geometric detailing, inflow and boundary conditions, numerical approach (RANS, LES, and DNS) and turbulence model. This study aims to investigate how the different inflow conditions that are usually adopted to simulate urban wind flows may affect the accuracy of the results. CFD simulations were performed on a selected urban area - “Quartiere La Venezia” in Livorno (Italy) - using a steady-state RANS approach. Two types of inflow profiles were considered for one wind direction (α = 240° from the North). Wind tunnel tests performed on the same urban model were used as a benchmark to validate the numerical simulations. Mean wind profiles at 25 locations were compared and the statistical performance in terms of four different metrics was quantified for both inflow conditions. The results show that slightly different inflow conditions can greatly affect the results in terms of mean wind speed and turbulent kinetic energy.

AB - Wind flow modeling in urban areas is influenced by many uncertainties, such as geometric detailing, inflow and boundary conditions, numerical approach (RANS, LES, and DNS) and turbulence model. This study aims to investigate how the different inflow conditions that are usually adopted to simulate urban wind flows may affect the accuracy of the results. CFD simulations were performed on a selected urban area - “Quartiere La Venezia” in Livorno (Italy) - using a steady-state RANS approach. Two types of inflow profiles were considered for one wind direction (α = 240° from the North). Wind tunnel tests performed on the same urban model were used as a benchmark to validate the numerical simulations. Mean wind profiles at 25 locations were compared and the statistical performance in terms of four different metrics was quantified for both inflow conditions. The results show that slightly different inflow conditions can greatly affect the results in terms of mean wind speed and turbulent kinetic energy.

KW - CFD

KW - urban wind flow

KW - inflow conditions

KW - mean wind profiles

KW - statistical performance

M3 - Chapter

SP - 1

EP - 10

BT - 8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), 7-11 June 2016, Boston, USA

T2 - 8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII), June 7-11, 2016, Northeastern University, Boston, Massachusetts, USA

Y2 - 7 June 2016 through 11 June 2016

ER -

Inflow condition sensitivity in the CFD simulation of wind flow in the urban environment

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