About Book

Computational fluid dynamics is a branch of fluid mechanics that uses numerical analysis and algorithms to solve and analyse problems that involve fluid flows. Computers are used to perform the calculations required to simulate the interaction of liquids and gases with surfaces defined by boundary conditions. Computational Fluid dynamics has a wide range of applications, including calculating forces and moments on aircraft, determining the mass flow rate of petroleum through pipelines, predicting weather patterns, understanding nebulae in interstellar space and modelling fission weapon detonation. Computational Fluid Dynamics (CFD) is the intersection of three main disciplines: Fluid Dynamics, Computational Methods, and Numerical Algorithms. It is an essential ingredient in the modern engineering of stable aerodynamic, hemodynamic and hydraulic systems, as it has the capability to predict the flow motions for a specific system design, but also enables the researcher the opportunity to study the system's reaction to additional sets of physical conditions. This book elucidates new techniques and the applications in the field of computational fluid dynamics in a multidisciplinary approach. It elaborates on the different theories and concepts related to this area. It deals with model of flow, coupling algorithm of computational fluid, CFD modelling, CFD analysis, CFD simulations, CFD applications, heat transfer and particle dynamics. Different approaches, evaluations and methodologies have been included in this book. Coherent flow of topics, student- friendly language and extensive use of examples make this book an invaluable source of knowledge. In this book, effort has been made to present the explanation in various methods, easy and simple way. It will serve as a valuable source of reference for those interested in this field.

Preface............................................................................................................v

Chapter 1 A Coupling Algorithm of Computational Fluid and Particle Dynamics (CFPD).......................................................................................1

Abstract...................................................................................................1

1. Introduction............................................................................................2

2. Dissipative hydrodynamics as unified particle dynamics............4

3. Computational fluid dynamics coupled with dissipative

hydrodynamics....................................................................................10

4. Concluding remarks...........................................................................16

Acknowledgements.............................................................................17

A. Appendix.........................................................................................17

Chapter 2 Transition Modeling for Low to High Speed Boundary Layer Flows with CFD Applications...............................................................21

Abstract.................................................................................................21

1. Introduction..........................................................................................22

2. Review of transition models.............................................................24

3. Two- and three-dimensional test cases for low to high

speeds....................................................................................................32

4. Conclusions..........................................................................................43

Chapter 3 Three-Dimensional CFD Simulations of Hydrodynamics for the Lowland Dam Reservoir.........................................................................48

Abstract.................................................................................................48

1. Introduction..........................................................................................48

2. Study area.............................................................................................50

3. Generation of three-dimensional geometry...................................52

4. Mathematical model...........................................................................59

5. Model verification...............................................................................65

6. Conclusions..........................................................................................69

Chapter 4 Use of CFD Codes for Calculation of Radiation Heat Transfer:

From Validation to Application............................................................72

Abstract.................................................................................................72

1. Introduction..........................................................................................72

2. Analytical solution method for thermal radiation in an

enclosure...............................................................................................74

3. Numerical simulation methods........................................................80

4. Application on the vacuum vessel of the fusion reactor...........88

5. Conclusions..........................................................................................92

Acknowledgements.............................................................................93

Chapter 5 Applications of CFD for Process Safety ............................................95

Abstract.................................................................................................95

1. Introduction..........................................................................................95

2. Fire modeling.....................................................................................100

3. CFD modeling...................................................................................104

4. Results.................................................................................................108

5. Conclusions........................................................................................115

Nomenclatures...................................................................................115

Chapter 6 Food Chilling Methods and CFD Analysis of a Refrigeration

Cabinet as a Case Study.......................................................................121

Abstract...............................................................................................121

1. Introduction........................................................................................121

2. Cooling rate and duration..............................................................122

3. Chilling equipment...........................................................................123

4. CFD modeling and simulation in a vertical refrigeration

cabinet.................................................................................................136

5. Conclusions........................................................................................151

Nomenclature....................................................................................152

Chapter 7 Solving Inverse Heat Transfer Problems When Using CFD

Modeling...................................................................................................155

Abstract .............................................................................................155

1. Introduction........................................................................................156

2. Measurements of heat flux absorbed by water walls in combustion

chambers.............................................................................................157

3. Identification of thermal boundary conditions in heat exchangers

of fluidized bed boilers....................................................................183

4. Description of the numerical method...........................................188

5. Results of the superheater modeling using ANSYS//CFX........192

6. Inverse problem.................................................................................200

7. Conclusions........................................................................................204

Nomenclature.....................................................................................206

Greek letters.......................................................................................207

Chapter 8 A Computational Fluid Dynamics Model of Flow and Settling in Sedimentation Tanks..............................................................................213

1. Introduction........................................................................................213

2. Scope and objectives.........................................................................215

3. Modelling the settling tank.............................................................216

4. Numerical techniques used in Fluent...........................................217

5. Experimental techniques for model calibration and

validation............................................................................................218

6. Model development, applications and results............................219

7. Simple improvements to the existing sedimentation tank in

WTP ....................................................................................................224

8. Modelling the scraper mechanism.................................................225

9. Design procedures and guidelines................................................226

10. Temperature effect ...........................................................................226

11. Validation of the model...................................................................228

12. Conclusions........................................................................................229

13. Acknowledgement ...........................................................................230

Chapter 9 Computational Fluid Dynamics .........................................................232

1. Introduction........................................................................................232

2. Pre-processing ..................................................................................236

3. Simulation .........................................................................................241

4. Post-processing .................................................................................250

5. Closing.................................................................................................252

Citation......................................................................................................259

Index...........................................................................................................261

About Author

Aaron Zieger obtained his Ph.D. in Fluid Mechanics from University College, Copenhagen. He is a Guest Lecturer at Science University, Vilnius. His current research topics are fluid dynamics, mathematical methods, large-scale physics flows and industrial applications. He has written several articles and journals on diffusion of pollutants, computational fluid dynamics and atmospheric meteorology. Zieger is an active member of several scientific and technical societies, where he shares his expertise and knowledge in this vast field. He is also working as an independent researcher, technical writer, and editor in the fields of mathematics, physics, astronomy and astrophysics.