Computational Fluid Dynamics Applied to Waste-to-Energy Processes: A Hands-On Approach

✍ Scribed by Valter Bruno Reis e Silva, João Cardoso

• Publisher: Butterworth-Heinemann
• Year: 2020
• Tongue: English
• Leaves: 204
• Edition: 1
• Category: Library

✦ Synopsis

Computational Fluid Dynamics Applied to Waste-to-Energy Processes: A Hands-On Approach provides the key knowledge needed to perform CFD simulations using powerful commercial software tools. The book focuses on fluid mechanics, heat transfer and chemical reactions. To do so, the fundamentals of CFD are presented, with the entire workflow broken into manageable pieces that detail geometry preparation, meshing, problem setting, model implementation and post-processing actions. Pathways for process optimization using CFD integrated with Design of Experiments are also explored. The book’s combined approach of theory, application and hands-on practice allows engineering graduate students, advanced undergraduates and industry practitioners to develop their own simulations.

✦ Table of Contents

Cover
COMPUTATIONAL
FLUID DYNAMICS
APPLIED TO
WASTE-TO-ENERGY
PROCESSES:
A Hands-On Approach
Copyright
Dedication
Preface
Acknowledgments
Section I: CFD workflow implementation
1
Introduction and overview of using computational fluid dynamics tools
Introduction
History of fluid mechanics
CFD companies and resources
Simulation workflow
Hydrodynamics in a fluidized bed gasifier-A case study
CFD applied to waste-to-energy processes
Conclusions
References
2
How to approach a real CFD problem-A decision-making process for gasification
Introduction
Problem identification
Identifying the domain
Preprocessing
Creating a solid model
Designing and creating a mesh
Mesh sensitivity analysis
Setting up the solver
Mathematical model formulation
Modeling approaches for multiphase flows
General governing equations
Hydrodynamic model
Turbulent flow
Chemical reactions model
Devolatilization submodel
Homogeneous gas-phase reactions submodels
Heterogeneous reactions submodels
Radiation model
Solution setup and calculation tasks
Model validation
Postprocessing
Conclusions, limitations, and future prospects
References
Section II: Combustion modeling
3
Overview of biomass combustion modeling: Detailed analysis and case study
Introduction
Experimental setup
Creating the geometry
Creating the mesh
Model considerations and implementation
Results display
NOx formation
Final remarks
References
4
Overview of biomass gasification modeling: Detailed analysis and case study
Introduction
Problem specification
Creating the geometry
Meshing the geometry
Setting-up the solver
Postprocessing
Final remarks
References
5
Gasification optimization using CFD combined with Design of Experiments
Introduction
Experimental set-up and substrates characterization
Experimental design
Some considerations
Discussion
Design of Experiments-Single optimization
Robustness
Some insights about Monte Carlo
Robust operating conditions
Some final thoughts
Conclusions
References
Section III: Gasification modeling
6
Advanced topics-Customization
Introduction
Sample function
Interpreting and compiling UDF
Creating a custom field functions
References
7
Advanced topics-Postprocessing
Introduction
Problem description
Solution display in CFD-Post application
Creating an animation video
Final remarks
Reference
Appendix
Appendix A
Mathematical model
Mass balance model
Momentum equations
Turbulence model
Granular Eulerian model
Granular Eulerian model
Devolatilization
Homogeneous gas-phase reactions
Species transport equations
Heterogeneous reaction rate
Energy conservation
Appendix B
Mathematical model
Energy conservation
Momentum model
Mass balance model
Turbulence model
Granular Eulerian model
Chemical reactions model
Pyrolysis
References
Index
Back Cover