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About this book

This book introduces readers to the fundamentals of simulating and analyzing built and natural environments using the Computational Fluid Dynamics (CFD) method. CFD offers a powerful tool for dealing with various scientific and engineering problems and is widely used in diverse industries. This book focuses on the most important aspects of applying CFD to the study of urban, buildings, and indoor and outdoor environments. Following the logical procedure used to prepare a CFD simulation, the book covers e.g. the governing equations, boundary conditions, numerical methods, modeling of different fluid flows, and various turbulence models. Furthermore, it demonstrates how CFD can be applied to solve a range of engineering problems, providing detailed hands-on exercises on air and water flow, heat transfer, and pollution dispersion problems that typically arise in the study of buildings and environments. The book also includes practical guidance on analyzing and reporting CFD results, as well as writing CFD reports/papers.

Table of Contents

Frontmatter

Chapter 1. Introduce CFD

Abstract
The essence of world and human life is fluids and flow. We all pass through life surrounded—and even sustained—by the flow of fluids. Blood moves through the vessels in our bodies, and air flows into our lungs.
Zhiqiang (John) Zhai

Chapter 2. Model Real Problems

Abstract
Most commercial CFD programs now come along with powerful user-friendly graphic interfaces and detailed user manuals; however, proper and efficient usage of these programs still requires sufficient expertise in fluid mechanics and its numerical methods. The first crucial element in CFD simulation is a procedure or method of abstracting, simplifying, and reconstructing the real world into a computer model, which directly determine the correctness and accuracy of final predictive solutions.
Zhiqiang (John) Zhai

Chapter 3. Select Equations to Be Solved

Abstract
Fluid mechanics mainly applies three conservation laws of mass, energy, and momentum to the fluid flow (called governing equations of flow) and predicts the flow characteristics and the interactions among fluids as well as with solids.
Zhiqiang (John) Zhai

Chapter 4. Select Turbulence Modeling Method

Abstract
Turbulence is a phenomenon of immense practical importance in nature and has therefore been extensively studied in the context of its applications, by both engineers and applied scientists.
Zhiqiang (John) Zhai

Chapter 5. Select Numerical Methods

Abstract
The basic concept of the numerical simulation is to discretize the accurate, spatially and temporally continuous differential equations into approximate, discrete algebraic equations that can be solved by a compute
Zhiqiang (John) Zhai

Chapter 6. Specify Boundary Conditions

Abstract
The governing equations of incompressible turbulent flow with the k-ε turbulence model can be expressed in the following general form:
Zhiqiang (John) Zhai

Chapter 7. Generate Grid

Abstract
The fundamentals of CFD is to solve the continuous governing equations of fluid flows in a discrete numerical manner.
Zhiqiang (John) Zhai

Chapter 8. Solve Case

Abstract
Chapter 5 presents the final universal form of the discretized governing equations for all flow conservations (e.g., mass, momentum, energy).
Zhiqiang (John) Zhai

Chapter 9. Analyze Results

Abstract
With the nick name of “Colorful Fluid Dynamics”, CFD is able to provide direct rendering of flow conditions that delivers the first impression on fluid trend, structure, characteristics and guides the design of fluid field or field-interacted objects.
Zhiqiang (John) Zhai

Chapter 10. Write CFD Report

Abstract
ASHRAE produces the Guideline 33 for Documenting Indoor Airflow and Contaminant Transport Modeling (ASHRAE in Guideline 33-2013: Guideline for Documenting Indoor Airflow and Contaminant Transport Modeling, 2013). This can be used as the ground for general requirements for reporting engineering CFD simulation and results. In general, four parts are required to form a complete CFD report.
Zhiqiang (John) Zhai
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