Implicit Large eddy simulation of wind flow over rough terrain

Bofu Wang; Fei Chen; Hui Xu; Xuerui Mao

Implicit Large eddy simulation of wind flow over rough terrain

Bofu Wang, Fei Chen, Hui Xu, Xuerui Mao^*

^*Corresponding author for this work

Research output: Contribution to conference › Paper › peer-review

1 Citation (Scopus)

Abstract

Atmospheric boundary layer (ABL) flow over a rough terrain is studied numerically. A drag force model is employed to represent surface roughness. The spectral vanishing viscosity (SVV) method is adopted for implicit large eddy simulation (ILES). These techniques enable us to capture the dominant features of turbulent flow over non-smooth terrain with inhomogeneous roughness at high Reynolds number without resolving the very fine scale turbulence near the wall. We then run a test case of wind resource assessment on rough terrain, namely ABL flow over a hill with small-scale surface roughness at Re = 10⁶ (Re is defined based on hill height). The instantaneous flow, mean flow and Reynolds stress are analysed in order to interprete the obtained turbulent flow. The effect of roughness length and associated drag coefficient are also evaluated.

Original language	English
Publication status	Published - 2017
Externally published	Yes
Event	17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2017 - Maui, United States Duration: 16 Dec 2017 → 21 Dec 2017

Conference

Conference	17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2017
Country/Territory	United States
City	Maui
Period	16/12/17 → 21/12/17

Keywords

Large eddy simulation
Rough terrain
Spectral element method
Spectral vanishing viscosity
Wind energy

Cite this

@conference{4e52ff8ef1d941a3b2d7066613de7100,

title = "Implicit Large eddy simulation of wind flow over rough terrain",

abstract = "Atmospheric boundary layer (ABL) flow over a rough terrain is studied numerically. A drag force model is employed to represent surface roughness. The spectral vanishing viscosity (SVV) method is adopted for implicit large eddy simulation (ILES). These techniques enable us to capture the dominant features of turbulent flow over non-smooth terrain with inhomogeneous roughness at high Reynolds number without resolving the very fine scale turbulence near the wall. We then run a test case of wind resource assessment on rough terrain, namely ABL flow over a hill with small-scale surface roughness at Re = 106 (Re is defined based on hill height). The instantaneous flow, mean flow and Reynolds stress are analysed in order to interprete the obtained turbulent flow. The effect of roughness length and associated drag coefficient are also evaluated.",

keywords = "Large eddy simulation, Rough terrain, Spectral element method, Spectral vanishing viscosity, Wind energy",

author = "Bofu Wang and Fei Chen and Hui Xu and Xuerui Mao",

note = "Publisher Copyright: {\textcopyright} ISROMAC 2017. All rights reserved.; 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2017 ; Conference date: 16-12-2017 Through 21-12-2017",

year = "2017",

language = "English",

}

TY - CONF

T1 - Implicit Large eddy simulation of wind flow over rough terrain

AU - Wang, Bofu

AU - Chen, Fei

AU - Xu, Hui

AU - Mao, Xuerui

PY - 2017

Y1 - 2017

N2 - Atmospheric boundary layer (ABL) flow over a rough terrain is studied numerically. A drag force model is employed to represent surface roughness. The spectral vanishing viscosity (SVV) method is adopted for implicit large eddy simulation (ILES). These techniques enable us to capture the dominant features of turbulent flow over non-smooth terrain with inhomogeneous roughness at high Reynolds number without resolving the very fine scale turbulence near the wall. We then run a test case of wind resource assessment on rough terrain, namely ABL flow over a hill with small-scale surface roughness at Re = 106 (Re is defined based on hill height). The instantaneous flow, mean flow and Reynolds stress are analysed in order to interprete the obtained turbulent flow. The effect of roughness length and associated drag coefficient are also evaluated.

AB - Atmospheric boundary layer (ABL) flow over a rough terrain is studied numerically. A drag force model is employed to represent surface roughness. The spectral vanishing viscosity (SVV) method is adopted for implicit large eddy simulation (ILES). These techniques enable us to capture the dominant features of turbulent flow over non-smooth terrain with inhomogeneous roughness at high Reynolds number without resolving the very fine scale turbulence near the wall. We then run a test case of wind resource assessment on rough terrain, namely ABL flow over a hill with small-scale surface roughness at Re = 106 (Re is defined based on hill height). The instantaneous flow, mean flow and Reynolds stress are analysed in order to interprete the obtained turbulent flow. The effect of roughness length and associated drag coefficient are also evaluated.

KW - Large eddy simulation

KW - Rough terrain

KW - Spectral element method

KW - Spectral vanishing viscosity

KW - Wind energy

UR - http://www.scopus.com/inward/record.url?scp=85083945888&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85083945888

T2 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2017

Y2 - 16 December 2017 through 21 December 2017

ER -

Implicit Large eddy simulation of wind flow over rough terrain

Abstract

Conference

Keywords

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