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E-book: Coupled CFD-DEM Modeling: Formulation, Implementation and Application to Multiphase Flows

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  • Format: PDF+DRM
  • Pub. Date: 14-Sep-2016
  • Publisher: John Wiley & Sons Inc
  • Language: eng
  • ISBN-13: 9781119005254
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Coupled CFD-DEM Modeling: Formulation, Implementation and Application to Multiphase FlowsLarger Image
  • Format: PDF+DRM
  • Pub. Date: 14-Sep-2016
  • Publisher: John Wiley & Sons Inc
  • Language: eng
  • ISBN-13: 9781119005254
Other books in subject:

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Discusses the CFD-DEM method of modeling which combines both the Discrete Element Method and  Computational Fluid Dynamics to simulate fluid-particle interactions.





Deals with both theoretical and practical concepts of CFD-DEM, its numerical implementation accompanied by a hands-on numerical code in FORTRAN Gives examples of industrial applications
About the Authors xi
Preface xiii
1 Introduction
1(14)
1.1 Multiphase Coupling
2(1)
1.2 Modeling Approaches
2(3)
1.3 Modeling with DEM
5(2)
1.4 CFD-DEM Modeling
7(3)
1.5 Applications
10(1)
1.6 Scope and Overall Plan
10(2)
1.7 Online Content
12(3)
References
12(3)
Part I DEM
15(242)
2 DEM Formulation
17(51)
2.1 Hard-Sphere
18(6)
2.1.1 Equation of Motion
19(1)
2.1.2 Collision Model
19(3)
2.1.3 Interparticle Forces
22(2)
2.2 Soft-Sphere
24(3)
2.2.1 Equations of Motion
25(2)
2.3 Force-Displacement Laws
27(29)
2.3.1 Linear Viscoelastic Model
29(7)
2.3.2 Nonlinear Viscoelastic Models
36(9)
2.3.3 Comparison of Viscoelastic Force-Displacement Models
45(4)
2.3.4 Elastic Perfectly Plastic Models
49(7)
2.4 Torque Expressions
56(2)
2.4.1 Model A: Constant Torque Model
56(1)
2.4.2 Model B: Viscous Model
57(1)
2.4.3 Model C: Spring-Dashpot Model
57(1)
2.5 Boundary and Initial Conditions
58(10)
2.5.1 Boundary Conditions
58(2)
2.5.2 Initial Condition
60(1)
Nomenclature
60(4)
References
64(4)
3 DEM Implementation
68(84)
3.1 Computational View
68(3)
3.2 Program Structure
71(5)
3.3 Contact Search Algorithms
76(27)
3.3.1 Definition of Problem
79(1)
3.3.2 Cell-Based Algorithms
80(16)
3.3.3 Sort-Based Algorithms
96(3)
3.3.4 Tree-Based Broad Search Algorithms
99(4)
3.3.5 Fine Search for Spherical Particles
103(1)
3.4 Integration Methods
103(16)
3.4.1 Single-Step Methods
106(4)
3.4.2 Multi-Step Algorithms
110(2)
3.4.3 Predictor-Corrector Methods
112(2)
3.4.4 Evaluation of Integration Methods
114(5)
3.5 Spring Stiffness
119(4)
3.5.1 Maximum Overlap
122(1)
3.5.2 Collision Time and Maximum Contact Force
123(1)
3.6 Wall Implementation
123(15)
3.6.1 Definition of Wall Elements
125(3)
3.6.2 Contact Detection
128(8)
3.6.3 Moving Wall
136(2)
3.7 Parallelization
138(14)
3.7.1 Distributed Memory Parallelization
138(3)
3.7.2 Shared-Memory Parallelization
141(4)
Nomenclature
145(2)
References
147(5)
4 Non-Spherical Particles
152(37)
4.1 Shape Representation
153(3)
4.2 Kinematics and Dynamics of a Rigid Body
156(8)
4.2.1 Euler Angles and Transformation Matrix
157(2)
4.2.2 Equations of Motion
159(4)
4.2.3 Quaternions for Rigid Body Dynamics
163(1)
4.3 Superellipsoids
164(14)
4.3.1 Contact Forces
166(3)
4.3.2 Effective Radius and Curvatures
169(4)
4.3.3 Torque Calculations
173(1)
4.3.4 Contact Detection
174(4)
4.4 Multi-Sphere Method
178(11)
Nomenclature
184(2)
References
186(3)
5 DEM Applications to Granular Flows
189(68)
5.1 Packing of Particles
189(7)
5.1.1 Confined Packing
189(3)
5.1.2 Pile Formation
192(2)
5.1.3 Rigid and Flexible Fibers
194(2)
5.2 Flow in Hoppers
196(7)
5.2.1 Flow Patterns
197(2)
5.2.2 Segregation
199(2)
5.2.3 Discharge Rate
201(2)
5.3 Solid Mixing
203(31)
5.3.1 Mechanisms of Mixing and Segregation
203(2)
5.3.2 Mixing Index
205(4)
5.3.3 Rotating Drums
209(11)
5.3.4 Tumbling Blenders
220(3)
5.3.5 Shaft Batch Mixers
223(6)
5.3.6 Continuous Mixers
229(5)
5.4 Screw Conveying
234(7)
5.4.1 Simulation of Screw Conveyor
237(1)
5.4.2 Results of the Simulations
238(1)
5.4.3 Literature
239(2)
5.5 Film Coating
241(16)
5.5.1 Phenomenological Models
243(1)
5.5.2 Monte-Carlo Method
244(3)
Nomenclature
247(2)
References
249(8)
Part II CFD-DEM
257(155)
6 CFD-DEM Formulation and Coupling
259(82)
6.1 Multiphase Coupling
260(7)
6.1.1 Coupling Strategies
260(2)
6.1.2 Types of Coupling
262(3)
6.1.3 Interphase Interactions
265(2)
6.2 Momentum Coupling
267(36)
6.2.1 Single Phase Flow of Fluids
267(7)
6.2.2 Fluid Resolution in CFD-DEM
274(1)
6.2.3 Unresolved Surface CFD-DEM
275(12)
6.2.4 Surface Force Decomposition
287(16)
6.3 Energy Coupling
303(16)
6.3.1 Governing Equations
304(4)
6.3.2 Rates of Heat Transfer for Particles
308(8)
6.3.3 Rates of Heat Transfer for Fluid
316(1)
6.3.4 Sequence of Calculations
317(2)
6.4 Mass Coupling
319(22)
6.4.1 Governing Equations
319(5)
6.4.2 Rates of Mass Transfer for Particles
324(5)
6.4.3 Rates of Change in Fluid
329(1)
6.4.4 Sequence of Calculations
329(1)
Nomenclature
329(6)
References
335(6)
7 CFD-DEM Applications to Multiphase Flow
341(31)
7.1 Fluidization
341(6)
7.1.1 Macro-Scale Phenomena
342(2)
7.1.2 Meso-Scale Phenomena
344(1)
7.1.3 Micro-Scale Phenomena
345(2)
7.2 Spouting
347(8)
7.3 Pneumatic Conveying
355(4)
7.3.1 Dilute Phase and Dense Phase Conveying
356(1)
7.3.2 Horizontal Conveying
357(2)
7.3.3 Vertical Conveying
359(1)
7.4 Non-Isothermal Flows
359(3)
7.5 Reactive Flows
362(2)
7.6 Miscellaneous
364(8)
Nomenclature
365(1)
References
366(6)
8 Interparticle Forces and External Fields
372(40)
8.1 Governing Equations
373(3)
6.1.1 Sequence of Calculations
375(1)
8.2 Interparticle Forces
376(14)
8.2.1 van der Waals Force
376(3)
8.2.2 Liquid Bridge Force
379(7)
8.2.3 Electrostatic Force
386(4)
8.3 External Fields
390(9)
8.3.1 Electric Field
390(3)
8.3.2 Magnetic Field
393(4)
8.3.3 Vibration Field
397(1)
8.3.4 Acoustic Field
398(1)
8.4 Applications
399(13)
Nomenclature
404(3)
References
407(5)
Index 412
Hamid Reza Norouzi holds a PhD from the University of Tehran in chemical engineering. His research interests are discrete element modeling, computational fluid dynamics and multiphase flows in chemical and pharmaceutical processes.

Reza Zarghami is Head of the Pharmaceutical Engineering program and Assistant Professor at the School of Chemical Engineering at the University of Tehran. His research interests include pharmaceutical processing and manufacturing, powder technology, advanced fluid mechanics and CFD in chemical engineering, and he has published over 70 articles.

Rahmat Sotudeh-Gharebagh is Director of Standard Research Institute, ISIRI, Tehran, Iran and a Professor of Chemical Engineering, at the University of Tehran. He founded the Pharmaceutical Engineering program there. His research interests include fluidization engineering, process modeling and simulation, chemical engineering education, pharmaceutical engineering and information technology. He has published three books, over 230 articles, and serves as editor-in-chief of Chemical Product and Process Modeling, and Journal of Industrial Technology Development.

Navid Mostoufi is a Professor at the School of Chemical Engineering at the University of Tehran in Iran where he has taught for 14 years. His industry experience has included developing operator training simulators and feasibility studies for several companies. He is the author of more than 140 journal articles and 115 conference papers on process engineering and modeling, and is an editor for three journals including Chemical Product and Process Modeling where he is joint editor-in-chief with Professor Rahmat Sotudeh-Gharebagh.
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