Chapter 1Background
Chapter2 Literature Survey
2.1Introduction
2.2Complex pipe systems
2.2.1Industrial scale circulating fluidized bed (CFB)
2.2.2Long-distance high-pressure dense-phase (LHD) pneumatic conveying system
2.2.3Bypass pneumatic conveying system
2.3 Numericalmethods
2.3.1 Twofluid model (TFM)
2.3.2Discrete element method (DEM)
2.3.3Coupling of DEM and CFD
2.3.4Coarse-grained (CG) /parcel CFD-DEM approach
2.4Summary and proposed research
Chapter3 Simulation of Industrial Scale CFB Using Coarse Grained CFD-DEM Model
3.1Introduction
3.2Experiments and simulation conditions
3.2.1Backgrounds
3.2.2Experimental set up and measurements
3.2.3Mathematical model
3.2.4Simulation conditions
3.3 Resultsand discussion
3.3.1Axia] pressure gradient
3.3.2Solid velocity and concentration
3.3.3Particle cluster and solids back mixing
3.3.4Analysis of the interaction forces
3.3.5 Effectsof different model particle sizes
3.3.6 Effectsof different solid mass flow rate
3.4Conclusions
Chapter 4Computational Study of Gas-solid Flow in LHD Pneumatic Conveying Systems
4.1Introduction
4.2Mathematical model
4.2.1TFM
4.2.2CFD-DEM
4.3Simulation conditions
4.4 Modelvalidation
4.5Results and discussion
4.5.1Pressure drop
4.5.2Gas velocity
4.5.3Solid velocity
4.5.4Forces governing the motion of solids
4.6Conclusion2<2r>
Chapter 5Numerical Study of Gas-solid Flow in Stepped Pipe with Inserts
5.1Introduction
5.2Mathematical model
5.2.1TFM
5.2.2 CFD-DEM
5.3Simulation conditions
5.4 Resultsand discussion
5.4.1Single pipe with inserts
5.4.2 Steppedpipe with inserts
5.4.3Different shape of inserts
5.5Conclusions
Chapter 6Particle-scale Modelling of Gas-solid Flow in Bypass System
6.1Introduction
6.2Mathematical model
6.3Simulation conditions
6.4 Resultsand discussion
6.4.1Grid study
6.4.2Pressure drop
6.4.3Gas velocity
6.4.4Solid velocity and general flow pattern
6.4.5Forces governing particle motion
6.5Conclusions
Chapter 7Effects Geometrical Parameters on the Gas-solid Flow in Bypass System
7.1Introduction
7.2Simulation method
7.3Simulation conditions
7.4 Resultsand discussion
7.4.1Effect of flute spacing
7.4.2Effect of small internal pipe diameters
7.4.3 Effectof orifice path diameter
7.5Conclusions
Chapter 8Summary and Future Work
8.1Summary
8.2Future work
References
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