Numerical Simulation Of Flows Near And Through A Two Dimensional Array Of Buildings

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Numerical Simulation of Flows Near and Through a Two-Dimensional Array of Buildings

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)

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Download or read book Numerical Simulation of Flows Near and Through a Two-Dimensional Array of Buildings written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Numerical Simulation of the Disturbed Flow Through a Three-Dimensional Building Array

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Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)

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Download or read book Numerical Simulation of the Disturbed Flow Through a Three-Dimensional Building Array written by and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the neutrally-stratified flow within and over an array of three-dimensional (3-D) buildings (cubes) was undertaken using simple Reynolds-averaged Navier-Stokes (RANS) flow models. These models consist of a general solution of the ensemble-averaged, steady-state, three-dimensional Navier-Stokes equations, where the k-E turbulence model (k is turbulence kinetic energy and E is viscous dissipation rate) has been used to close the system of equations. Two turbulence closure models were tested; namely, the standard and Kato-Launder k-E models. The latter model is a modified k-E model designed specifically to overcome the stagnation point anomaly in flows past a bluff body where the standard k-E model overpredicts the production of turbulence kinetic energy near the stagnation point. Results of a detailed comparison between a wind tunnel experiment and the RANS flow model predictions are presented. More specifically, vertical profiles of the predicted mean streamwise velocity, mean vertical velocity, and turbulence kinetic energy at a number of streamwise locations that extend from the impingement zone upstream of the array, through the array interior, to the exit region downstream of the array are presented and compared to those measured in the wind tunnel experiment. Generally, the numerical predictions show good agreement for the mean flow velocities. The turbulence kinetic energy was underestimated by the two different closure models. After validation, the results of the high-resolution RANS flow model predictions were used to diagnose the dispersive stress, within and above the building array. The importance of dispersive stresses, which arise from point-to-point variations in the mean flow field, relative to the spatially-averaged Reynolds stresses are assessed for the building array.

Numerical Analysis of Heat and Mass Transfer in Porous Media

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Author : J.M.P.Q. Delgado
Publisher : Springer Science & Business Media
ISBN 13 : 3642305326
Total Pages : 317 pages
Book Rating : 4.6/5 (423 download)

Book Synopsis Numerical Analysis of Heat and Mass Transfer in Porous Media by : J.M.P.Q. Delgado

Download or read book Numerical Analysis of Heat and Mass Transfer in Porous Media written by J.M.P.Q. Delgado and published by Springer Science & Business Media. This book was released on 2012-06-25 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of ‘Numerical Analysis of Heat and Mass Transfer in Porous Media’ is to provide a collection of recent contributions in the field of computational heat and mass transfer in porous media. The main benefit of the book is that it discusses the majority of the topics related to numerical transport phenomenon in engineering (including state-of-the-art and applications) and presents some of the most important theoretical and computational developments in porous media and transport phenomenon domain, providing a self-contained major reference that is appealing to both the scientists, researchers and the engineers. At the same time, these topics encounter of a variety of scientific and engineering disciplines, such as chemical, civil, agricultural, mechanical engineering, etc. The book is divided in several chapters that intend to be a resume of the current state of knowledge for benefit of professional colleagues.

Numerical Simulation of Flow and Dispersion Around Buildings

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Author : YanQing Zhang
Publisher :
ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.:/5 (32 download)

Book Synopsis Numerical Simulation of Flow and Dispersion Around Buildings by : YanQing Zhang

Download or read book Numerical Simulation of Flow and Dispersion Around Buildings written by YanQing Zhang and published by . This book was released on 1993 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Numerical Simulation in Fluid Dynamics

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Author : Michael Griebel
Publisher : SIAM
ISBN 13 : 0898713986
Total Pages : 222 pages
Book Rating : 4.8/5 (987 download)

Book Synopsis Numerical Simulation in Fluid Dynamics by : Michael Griebel

Download or read book Numerical Simulation in Fluid Dynamics written by Michael Griebel and published by SIAM. This book was released on 1998-01-01 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this translation of the German edition, the authors provide insight into the numerical simulation of fluid flow. Using a simple numerical method as an expository example, the individual steps of scientific computing are presented: the derivation of the mathematical model; the discretization of the model equations; the development of algorithms; parallelization; and visualization of the computed data. In addition to the treatment of the basic equations for modeling laminar, transient flow of viscous, incompressible fluids - the Navier-Stokes equations - the authors look at the simulation of free surface flows; energy and chemical transport; and turbulence. Readers are enabled to write their own flow simulation program from scratch. The variety of applications is shown in several simulation results, including 92 black-and-white and 18 color illustrations. After reading this book, readers should be able to understand more enhanced algorithms of computational fluid dynamics and apply their new knowledge to other scientific fields.

Numerical Simulation of Two-dimensional Flow for a Spiral Channel

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Author : Constantinos Stylianos Nicolaides
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.:/5 (243 download)

Book Synopsis Numerical Simulation of Two-dimensional Flow for a Spiral Channel by : Constantinos Stylianos Nicolaides

Download or read book Numerical Simulation of Two-dimensional Flow for a Spiral Channel written by Constantinos Stylianos Nicolaides and published by . This book was released on 1991 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Engineering to Adapt

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Author : David S-K. Ting
Publisher : Springer Nature
ISBN 13 : 3031472373
Total Pages : 236 pages
Book Rating : 4.0/5 (314 download)

Book Synopsis Engineering to Adapt by : David S-K. Ting

Download or read book Engineering to Adapt written by David S-K. Ting and published by Springer Nature. This book was released on 2023-11-25 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collates important contributions from Engineering to Adapt (ETA2023). Eta, η, the 7th letter of the Greek alphabet, is scrupulously used to denote efficiency and this is what ETA2023 strives for. In context, efficiency, η, is about avoiding waste, may this be energy, time, money, or material, in accomplishing something useful. As such, ETA2023 aims at bringing experts and future leaders together to forge more efficient ways to engineer and live. In other words, ETA2023 strives to synergise and catalyse all stakeholders, enthusiasts, and experts from academia, industry, policy arenas, and the general public, to formulate novel ways to improve tomorrow. This symposium will disseminate recent progress and promote collaborations to maximize opportunities for innovative integrated solutions. Topics of interest include resource and energy efficiency, waste reduction, and eco-friendly agriculture, architecture, engineering, and living.

Recent Advances in Urban Ventilation Assessment and Flow Modelling

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Author : Riccardo Buccolieri
Publisher : MDPI
ISBN 13 : 303897806X
Total Pages : 448 pages
Book Rating : 4.0/5 (389 download)

Book Synopsis Recent Advances in Urban Ventilation Assessment and Flow Modelling by : Riccardo Buccolieri

Download or read book Recent Advances in Urban Ventilation Assessment and Flow Modelling written by Riccardo Buccolieri and published by MDPI. This book was released on 2019-04-23 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains twenty-one original papers and one review paper published by internationally recognized experts in the Atmosphere Special Issue "Recent Advances in Urban Ventilation Assessment and Flow Modelling", years 2017–2019. The Special Issue includes contributions on recent experimental and modelling works, techniques, and developments mainly tailored to the assessment of urban ventilation on flow and pollutant dispersion in cities. The study of ventilation is of critical importance, as it addresses the capacity with which a built urban structure is capable of replacing the polluted air with ambient fresh air. Here, ventilation is recognized as a transport process that improves local microclimate and air quality and closely relates to the term “breathability”. The efficiency with which street canyon ventilation occurs depends on the complex interaction between the atmospheric boundary layer flow and the local urban morphology. The individual contributions to this Issue are summarized and categorized into four broad topics: (1) outdoor ventilation efficiency and application/development of ventilation indices, (2) relationship between indoor and outdoor ventilation, (3) effects of urban morphology and obstacles to ventilation, and (4) ventilation modelling in realistic urban districts. The results and approaches presented and proposed will be of great interest to experimentalists and modelers, and may constitute a starting point for the improvement of numerical simulations of flow and pollutant dispersion in the urban environment, for the development of simulation tools, and for the implementation of mitigation strategies.

Scientific and Technical Aerospace Reports

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ISBN 13 :
Total Pages : 1102 pages
Book Rating : 4.X/5 (2 download)

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Applied Mechanics Reviews

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ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.3/5 (243 download)

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Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1987 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A Numerical Simulation of Two-dimensional Separated Flow in Symmetric Open Channel Expansion Using the Depth-integrated Two Eq

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Author : Raymond Scott Chapman
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (96 download)

Book Synopsis A Numerical Simulation of Two-dimensional Separated Flow in Symmetric Open Channel Expansion Using the Depth-integrated Two Eq by : Raymond Scott Chapman

Download or read book A Numerical Simulation of Two-dimensional Separated Flow in Symmetric Open Channel Expansion Using the Depth-integrated Two Eq written by Raymond Scott Chapman and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Air Pollution Modeling and its Application XIV

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Author : Sven-Erik Gryning
Publisher : Springer Science & Business Media
ISBN 13 : 0306474603
Total Pages : 737 pages
Book Rating : 4.3/5 (64 download)

Book Synopsis Air Pollution Modeling and its Application XIV by : Sven-Erik Gryning

Download or read book Air Pollution Modeling and its Application XIV written by Sven-Erik Gryning and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 737 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Millennium NATO/CCMS International Technical Meeting on Air Pollution Modeling and its Application, held May 15-19 in Boulder, Colorado. This volume is the latest in a series of proceedings dating back to 1971. The book addresses the problem of air pollution and reports the latest findings and developments in air pollution modeling, from a truly international list of contributors.

Noise and Vibration Mitigation for Rail Transportation Systems

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Author : Xiaozhen Sheng
Publisher : Springer Nature
ISBN 13 : 9819978521
Total Pages : 782 pages
Book Rating : 4.8/5 (199 download)

Book Synopsis Noise and Vibration Mitigation for Rail Transportation Systems by : Xiaozhen Sheng

Download or read book Noise and Vibration Mitigation for Rail Transportation Systems written by Xiaozhen Sheng and published by Springer Nature. This book was released on with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Numerical Simulation of Free Surface Flow in Two Dimensions

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Author : Chen-Shan Kung
Publisher :
ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (185 download)

Book Synopsis Numerical Simulation of Free Surface Flow in Two Dimensions by : Chen-Shan Kung

Download or read book Numerical Simulation of Free Surface Flow in Two Dimensions written by Chen-Shan Kung and published by . This book was released on 1988 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

ERDA Energy Research Abstracts

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Author : United States. Energy Research and Development Administration
Publisher :
ISBN 13 :
Total Pages : 776 pages
Book Rating : 4.3/5 (91 download)

Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1977 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

NASA Technical Memorandum

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ISBN 13 :
Total Pages : 492 pages
Book Rating : 4.:/5 (319 download)

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Download or read book NASA Technical Memorandum written by and published by . This book was released on 1994 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Energy

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ISBN 13 :
Total Pages : 1092 pages
Book Rating : 4.F/5 ( download)

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Download or read book Energy written by and published by . This book was released on 1980 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt: