Numerical studies of flow through a windbreak

Wilson, John D.

doi:10.1016/0167-6105(85)90001-7

Cited by 197 publications

(144 citation statements)

References 27 publications

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“…Quantitative observation of wind direction is more difficult than the observation of windspeed, (Kaiser 1959, Plate 1971, Taylor 1988, Counihan et al 1974, Hagen et al 1981, Wilson 1985, Wang & Shen 1989, Wang 1991a,b, 1992, Wang & Takle 1995b,c,d, 1996a. We define the incidence angle (a) as an angle between undisturbed wind direction and the normal line (x axis) of the shelterbelt, and local wind angle (y) as an angle between local wind direction and the normal line of the shelterbelt.…”

Section: Variations Of Wind Direction Around Shelterbeltsmentioning

confidence: 99%

“…(lO), (11) and (12) is the parameterized drag force exerted by shelterbelts following Thom (1975), Wilson and Shaw (1977). Several investigators used this method to successfully simulate forest and crop flows (Wilson and Shaw 1977, Wilson 1985, Yamada 1982, Meyers and Paw U 1986, Naot and Mahrer 1991, Li et al 1989, Miller et al 1991. U is total mean windspeed, A(x,y,z)…”

Section: Simplification Of Governing Equationsmentioning

confidence: 99%

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SHELTERBELTS ANDWINDBREAKS:Mathematical Modeling and Computer Simulations of Turbulent Flows

Wang

Takle

Shen

2001

Annu. Rev. Fluid Mech.

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Shelterbelts or windbreaks have been used for centuries to reduce wind speed, to control heat and moisture transfer and pollutant diffusion, to improve climate and environment, and to increase crop yields; but only within the last few decades have systematic studies considered the aerodynamics and shelter mechanisms of shelterbelts and windbreaks. This is a review of recent modeling and numerical simulation studies as well as the mechanisms that control flow and turbulence around shelterbelts and windbreaks. We compare numerical simulations with experimental data and explain the relationships between sheltering effects and the structure of shelterbelts and windbreaks. We discuss how and why the desired effects are achieved by using numerical analysis. This chapter begins with the derivation of a general equation set for porous shelterbelts and windbreaks; the numerical model and simulation procedure are developed; unseparated and separated flows are predicted and characterized; the momentum budget and This article has been accepted for publication by Annual Reviews in a revised form. 23shelter mechanisms are analyzed; the effects of wind direction, density, width, and three dimensionality of shelterbelt structure on flow and turbulence are systematically described.Recent modeling and simulation of heat flux and évapotranspiration also are summarized.Finally, we discuss use of high-performance distributed and parallel computing as well as clusters of networked workstations to enhance performance of the model applied to simulations of shelterbelts and windbreaks.

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Section: Variations Of Wind Direction Around Shelterbeltsmentioning

confidence: 99%

Section: Simplification Of Governing Equationsmentioning

confidence: 99%

SHELTERBELTS ANDWINDBREAKS:Mathematical Modeling and Computer Simulations of Turbulent Flows

Wang

Takle

Shen

2001

Annu. Rev. Fluid Mech.

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“…The staggered grid for the second-order closure formulation, were here set up by specifying the locations of u, w, p and k (also e) in four points of as has mentioned by Wilson (1984).…”

Section: Methodsmentioning

confidence: 99%

A Numerical Model for the Study of Thermal Effect of Grass-Covered Parks in a Humid Urban Area

Madjidi

Bidokhti

Ghader

et al. 2011

SOLA

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“…The term (C ir ρ u mag u i /2) in Eqn (6) computes the inertial loss of the fluid flowing through the windbreak, which varies over the height of the tree depending on its shape (Wang & Takle, 1995;Wilson, 2004;Wilson, 1985). Poplars offer dense foliage at their top compared to conifers which offer more foliage at their base.…”

Section: Describing the Windbreakmentioning

confidence: 99%