The Modelling of Ventilation-related Flows Using Computational Fluid Dynamics PDF Download
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Author: Norman Rhodes
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Norman Rhodes
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Hyoung Woo Oh
Publisher: BoD – Books on Demand
ISBN: 9537619591
Category : Computers
Languages : en
Pages : 430
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Book Description
This book is intended to serve as a reference text for advanced scientists and research engineers to solve a variety of fluid flow problems using computational fluid dynamics (CFD). Each chapter arises from a collection of research papers and discussions contributed by the practiced experts in the field of fluid mechanics. This material has encompassed a wide range of CFD applications concerning computational scheme, turbulence modeling and its simulation, multiphase flow modeling, unsteady-flow computation, and industrial applications of CFD.
Author: Riccardo Buccolieri
Publisher: MDPI
ISBN: 303897806X
Category : Science
Languages : en
Pages : 448
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Book Description
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.
Author:
Publisher:
ISBN: 9782960046892
Category : Ventilation
Languages : en
Pages : 104
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Author: Jiyuan Tu
Publisher: Springer Science & Business Media
ISBN: 9400744870
Category : Technology & Engineering
Languages : en
Pages : 383
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Traditional research methodologies in the human respiratory system have always been challenging due to their invasive nature. Recent advances in medical imaging and computational fluid dynamics (CFD) have accelerated this research. This book compiles and details recent advances in the modelling of the respiratory system for researchers, engineers, scientists, and health practitioners. It breaks down the complexities of this field and provides both students and scientists with an introduction and starting point to the physiology of the respiratory system, fluid dynamics and advanced CFD modeling tools. In addition to a brief introduction to the physics of the respiratory system and an overview of computational methods, the book contains best-practice guidelines for establishing high-quality computational models and simulations. Inspiration for new simulations can be gained through innovative case studies as well as hands-on practice using pre-made computational code. Last but not least, students and researchers are presented the latest biomedical research activities, and the computational visualizations will enhance their understanding of physiological functions of the respiratory system.
Author: Li Xi
Publisher: MDPI
ISBN: 3036512667
Category : Technology & Engineering
Languages : en
Pages : 296
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Book Description
Computational fluid dynamics (CFD), which uses numerical analysis to predict and model complex flow behaviors and transport processes, has become a mainstream tool in engineering process research and development. Complex chemical processes often involve coupling between dynamics at vastly different length and time scales, as well as coupling of different physical models. The multiscale and multiphysics nature of those problems calls for delicate modeling approaches. This book showcases recent contributions in this field, from the development of modeling methodology to its application in supporting the design, development, and optimization of engineering processes.
Author: Parham A. Mirzaei
Publisher: John Wiley & Sons
ISBN: 1119743532
Category : Technology & Engineering
Languages : en
Pages : 629
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Book Description
COMPUTATIONAL FLUID DYNAMICS AND ENERGY MODELLING IN BUILDINGS A Comprehensive Overview of the Fundamentals of Heat and Mass Transport Simulation and Energy Performance in Buildings In the first part of Computational Fluid Dynamics and Energy Modelling in Buildings: Fundamentals and Applications, the author explains the fundamentals of fluid mechanics, thermodynamics, and heat transfer, with a specific focus on their application in buildings. This background knowledge sets the scene to further model heat and mass transport in buildings, with explanations of commonly applied simplifications and assumptions. In the second part, the author elaborates how the fundamentals explained in part 1 can be used to model energy flow in buildings, which is the basis of all commercial and educational building energy simulation tools. An innovative illustrative nodal network concept is introduced to help readers comprehend the basics of conservation laws in buildings. The application of numerical techniques to form dynamic simulation tools are then introduced. In general, understanding these techniques will help readers to identify and justify their choices when working with building energy simulation tools, rather than using default settings. Detailed airflow information in buildings cannot be obtained in building energy simulation techniques. Therefore, part three is focused on introducing computational fluid dynamics (CFD) as a detailed modelling technique for airflow in buildings. This part starts with an introduction to the fundamentals of the finite volume method used to solve the governing fluid equations and the related challenges and considerations are discussed. The last chapter of this part covers the solutions to some practical problems of airflow within and around buildings. The key aspect of Computational Fluid Dynamics and Energy Modelling in Buildings: Fundamentals and Applications is that it is tailored for audiences without extensive past experience of numerical methods. Undergraduate or graduate students in architecture, urban planning, geography, architectural engineering, and other engineering fields, along with building performance and simulation professionals, can use this book to gain additional clarity on the topics of building energy simulation and computational fluid dynamics.
Author: Bjørn H. Hjertager
Publisher: MDPI
ISBN: 3038426687
Category : Technology & Engineering
Languages : en
Pages : 211
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Book Description
This book is a printed edition of the Special Issue "Engineering Fluid Dynamics" that was published in Energies
Author: Yingchun Ji
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Natural ventilation is widely recognised as contributing towards low-energybuilding design. The requirement to reduce energy usage in new buildings hasrejuvenated interest in natural ventilation. This thesis deals with computer modelling of natural displacement ventilationdriven either by buoyancy or buoyancy combined with wind forces. Twobenchmarks have been developed using computational fluid dynamics (CFD)in order to evaluate the accuracy with which CFD is able to model naturaldisplacement ventilation flow. The first benchmark considers the naturalventilation of a single ventilated space with high and low level openingsconnected to the exterior driven by combined forces of wind and buoyancy. The second benchmark considers natural ventilation flow in a single spaceconnected to an atrium driven by pure buoyancy. Simulation results of keyventilation parameters (stratification depth, temperature gradient andventilation flow rate) have been compared with analytical and experimentalmodels and close agreements have been achieved. The two benchmarks are defined using the RNG k-epsilon turbulence model. A pressure boundary is applied onto the ventilation openings directly and aporous medium boundary is used to assist the development of the thermalplume. This method has proved to be robust and the close agreementbetween the three modelling techniques indicates that CFD is able to modelnatural ventilation flows in simple geometries with acceptable accuracy andreliability. Using the benchmarks the influences of key CFD modelling parameters andbuilding design issues have been investigated. For example, representingopenings, heat source representation, stack height, and air inlet strategies. Natural displacement ventilation of a multi-storey building comprising anatrium is also addressed. Simple analytical models have been developed todescribe the key air flow features within the ventilation system.
Author: Ravi Nabar
Publisher:
ISBN:
Category :
Languages : en
Pages : 482
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