Effect of granular properties on hydrodynamics in coarse-grid riser flow simulation of Geldart A and B particles

In this work, a three-dimensional coarse-grid two-fluid model (TFM) simulation by varying granular properties like granular viscosity, frictional viscosity, and solids pressure has been performed. Simulated predictions were subsequently compared with experimental results in the case of Geldart A or...

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Veröffentlicht in:Powder technology Jg. 359; S. 126 - 144
Hauptverfasser: Rashid, Taha Abbas Bin, Zhu, Li-Tao, Luo, Zheng-Hong
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Lausanne Elsevier B.V 01.01.2020
Elsevier BV
Schlagworte:
Coarse-grid simulation
Computational fluid dynamics
Computer applications
Computer simulation
Fast fluidization
Flow simulation
Fluid flow
Fluidization
Fluidizing
Granular properties
Hydrodynamics
Laminar flow
powders
prediction
Pressure
Properties (attributes)
Simulation
Three dimensional models
turbulent flow
Two fluid models
Two-fluid model (TFM)
Two-phase flow
Viscosity
Fast fluidization
Coarse-grid simulation
Two-fluid model (TFM)
Granular properties
Two-phase flow
ISSN:0032-5910, 1873-328X
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Zusammenfassung:In this work, a three-dimensional coarse-grid two-fluid model (TFM) simulation by varying granular properties like granular viscosity, frictional viscosity, and solids pressure has been performed. Simulated predictions were subsequently compared with experimental results in the case of Geldart A or B particles. Laminar flow behavior is also studied and coarse-grid simulation predictions were less realistic for laminar flow. This flow regime which although consumes less computational resources falls short for large-scale riser scale up. Flow regime in our simulation was fast fluidization and simulation predicts with minimum error near riser inlet. More specifically, granular viscosity, frictional viscosity and solids pressure for Type A particles predict with minimum error especially near riser inlet at a lower height. For Type B particles, these three solid properties correspond closely with experimental results near inlet at a lower height whereas, at a higher height, turbulence increases and simulation results deviate from experimental studies. [Display omitted] •A sub-grid drag model has been used.•Coarse-grid two-fluid simulation has been performed.•Laminar and turbulent flow behavior has been compared.•Granular property effect on flow behavior has been systematically assessed.
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ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2019.09.060