Two-dimensional Time-dependent Numerical Simulation of Atmospheric Flow Over an Urban Area PDF Download
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Author: Tsann-wang Yu
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 228
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Author: Tsann-wang Yu
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 228
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Book Description
Author: Maddukuri, C. Subbarao
Publisher: 1977.
ISBN:
Category : Boundary layer (Meteorology)
Languages : en
Pages : 274
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Ix, 97 l graphs, tables.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Ix, 97 l graphs, tables.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
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Book Description
Author: Helmut E. Landsberg
Publisher: Academic Press
ISBN: 0080924190
Category : Political Science
Languages : en
Pages : 289
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Book Description
The Urban Climate aims to summarize analytical studies directed toward physical understanding of the rural-urban differences in the atmospheric boundary layer. Attempts to quantify conditions have met with some success. There is certainly a clear understanding of the physical relations that create the climatic differences of urbanized areas. Although some of the earlier classical studies are cited here, the emphasis is on the work done during the last decade and a half. This volume comprises 11 chapters, beginning with an introductory chapter discussing the literature surrounding the topic, its historical development, and the problem of local climate modification. The second chapter presents an assessment of the urban atmosphere on a synoptic and local scale, and examines the observational procedures involved. The following chapters then go on to discuss urban air composition; urban energy fluxes; the urban heat island; the urban wind field; models of urban temperature and wind fields; moisture, clouds, and hydrometeors; urban hydrology; special aspects of urban climate; and finally, urban planning. This book will be of interest to practitioners in the fields of meteorology, urban planning, and urban climatology.
Author: Raymond Viskanta
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 128
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 71
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A numerical simulation has been performed of turbulent flow near and through a two-dimensional array of rectangular buildings (bluff bodies) in a neutrally stratified background flow. The model used for the simulation was the steady-state Reynolds-averaged Navier-Stokes equations with an isotropic, linear eddy viscosity formulation for the Reynolds stresses; and, the eddy viscosity was determined using a high-Reynolds number form of the kappa-epsilon turbulence-closure model with the boundary conditions at the wall obtained with the wall-function approach. The resulting system of partial differential equations along with the concomitant boundary conditions for the problem was solved using the SIMPLE algorithm in conjunction with a non-orthogonal, collocated, cell-centered, finite volume procedure. The predictive capabilities of the numerical simulation of urban flow are validated against a very detailed and comprehensive wind tunnel data set. Vertical profiles of the mean streamwise and vertical velocities and the turbulence kinetic energy are presented and compared to those measured in the wind tunnel simulation. In addition to the comparison between modeled and measured results, the numerical simulation is used to aid in the interpretation of certain features of the flow observed in the wind tunnel simulation. it is found that the overall performance of the model is good--most of the qualitative features in the disturbed turbulent flow field in and near the building array are correctly reproduced, and the quantitative agreement is also generally fairly good (especially for the mean velocity field). The underestimation of the turbulence energy levels may arise from the inability of the model to capture the subtle effects of secondary strain, especially those associated with curvature, on the turbulence.
Author:
Publisher:
ISBN:
Category : Urban climatology
Languages : en
Pages : 390
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Book Description
Author: John Peschier (Jr.)
Publisher:
ISBN:
Category : Anemometer
Languages : en
Pages : 82
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